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padding-bottom: 2px; background-color: #cceeff; width: 1%; vertical-align: bottom;">&#160;</td><td valign="bottom" style="padding-bottom: 2px; background-color: #cceeff; width: 1%; vertical-align: bottom;">&#160;</td><td valign="bottom" style="border-bottom: #000000 2px solid; text-align: left; background-color: #cceeff; width: 1%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">$</div></td><td valign="bottom" style="border-bottom: #000000 2px solid; text-align: right; background-color: #cceeff; width: 9%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">3,092</div></td><td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 2px; background-color: #cceeff; width: 1%; vertical-align: bottom;">&#160;</td></tr><tr><td valign="bottom" style="padding-bottom: 4px; background-color: #ffffff; width: 42%; vertical-align: bottom;"><div style="text-align: left; text-indent: -9pt; 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text-align: left; background-color: #ffffff; width: 1%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">$</div></td><td valign="bottom" style="border-bottom: #000000 4px double; text-align: right; background-color: #ffffff; width: 9%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">-</div></td><td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 4px; background-color: #ffffff; width: 1%; vertical-align: bottom;">&#160;</td><td valign="bottom" style="padding-bottom: 4px; background-color: #ffffff; width: 1%; vertical-align: bottom;">&#160;</td><td valign="bottom" style="border-bottom: #000000 4px double; text-align: left; background-color: #ffffff; width: 1%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">$</div></td><td valign="bottom" style="border-bottom: #000000 4px double; text-align: right; background-color: #ffffff; width: 9%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">-</div></td><td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 4px; background-color: #ffffff; width: 1%; vertical-align: bottom;">&#160;</td><td valign="bottom" style="padding-bottom: 4px; background-color: #ffffff; width: 1%; vertical-align: bottom;">&#160;</td><td valign="bottom" style="border-bottom: #000000 4px double; text-align: left; background-color: #ffffff; width: 1%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">$</div></td><td valign="bottom" style="border-bottom: #000000 4px double; text-align: right; background-color: #ffffff; width: 9%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">3,092</div></td><td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 4px; background-color: #ffffff; width: 1%; vertical-align: bottom;">&#160;</td></tr></table><div style="text-align: left;"><br /></div><table border="0" cellpadding="0" cellspacing="0" style="width: 90%; 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width: 1%; vertical-align: bottom;"></td></tr><tr><td valign="bottom" style="padding-bottom: 2px; width: 42%; vertical-align: bottom;"><div style="text-align: left;">&#160;</div></td><td valign="bottom" style="vertical-align: bottom;"></td><td colspan="2" valign="bottom" style="border-bottom: #000000 2px solid; vertical-align: bottom;"><div style="text-align: center; font-family: ''Times New Roman'', Times, serif; font-size: 10pt; font-weight: bold;">Level 1</div></td><td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 2px; width: 1%; vertical-align: bottom;">&#160;</td><td valign="bottom" style="vertical-align: bottom;"></td><td colspan="2" valign="bottom" style="border-bottom: #000000 2px solid; vertical-align: bottom;"><div style="text-align: center; font-family: ''Times New Roman'', Times, serif; font-size: 10pt; font-weight: bold;">Level 2</div></td><td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 2px; width: 1%; vertical-align: bottom;">&#160;</td><td valign="bottom" style="vertical-align: bottom;"></td><td colspan="2" valign="bottom" style="border-bottom: #000000 2px solid; 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width: 9%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">-</div></td><td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 2px; background-color: #cceeff; width: 1%; vertical-align: bottom;">&#160;</td><td valign="bottom" style="padding-bottom: 2px; background-color: #cceeff; width: 1%; vertical-align: bottom;">&#160;</td><td valign="bottom" style="border-bottom: #000000 2px solid; text-align: left; background-color: #cceeff; width: 1%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">$</div></td><td valign="bottom" style="border-bottom: #000000 2px solid; text-align: right; background-color: #cceeff; width: 9%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">3,092</div></td><td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 2px; background-color: #cceeff; width: 1%; vertical-align: bottom;">&#160;</td></tr><tr><td valign="bottom" style="padding-bottom: 4px; 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font-size: 10pt;">$</div></td><td valign="bottom" style="border-bottom: #000000 4px double; text-align: right; background-color: #ffffff; width: 9%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">-</div></td><td nowrap="nowrap" valign="bottom" style="text-align: left; padding-bottom: 4px; background-color: #ffffff; width: 1%; vertical-align: bottom;">&#160;</td><td valign="bottom" style="padding-bottom: 4px; background-color: #ffffff; width: 1%; vertical-align: bottom;">&#160;</td><td valign="bottom" style="border-bottom: #000000 4px double; text-align: left; background-color: #ffffff; width: 1%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">$</div></td><td valign="bottom" style="border-bottom: #000000 4px double; text-align: right; background-color: #ffffff; width: 9%; vertical-align: bottom;"><div style="font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">3,092</div></td><td nowrap="nowrap" valign="bottom" style="text-align: left; 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font-size: 10pt;">For cash and cash equivalents, accounts receivable, and accounts payable, the carrying amount approximates fair value because of the relative short maturity of those instruments.</div></div> 0 29000 1134000 1544000 4354000 5307000 -1148000 5502000 0 100000 <div style="font-family: 'Times New Roman', Times, serif; font-size: 10pt;"><div style="text-align: left;"><table cellpadding="0" cellspacing="0" class="DSPFListTable" style="width: 100%; font-family: 'Times New Roman', Times, serif; font-size: 10pt;"><tr><td style="width: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt; vertical-align: top; font-weight: bold; align: right;">6.</td><td style="text-align: left; width: auto; font-family: ''Times New Roman'', Times, serif; font-size: 10pt; vertical-align: top; font-weight: bold;">Guarantees</td></tr></table></div><div style="text-align: left; text-indent: 29.7pt;"><br /></div><div style="text-align: justify; text-indent: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">In certain geographical regions, particularly EMEA, we are sometimes required to issue performance guarantees to our customers as a condition of sale. 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Our products and solutions are designed to deliver continuous clean power, protecting customers from voltage fluctuations, such as surges and sags, and frequency fluctuations, and also to provide ride-through, or temporary, power to bridge the gap between a power outage and the restoration of utility power. Our target customers are those global enterprises requiring &#8220;power insurance&#8221; because they have zero tolerance for downtime in their mission critical operations. The Uninterruptible Power Supply (&#8220;UPS&#8221;) products we manufacture use kinetic energy to provide short-term power as a cleaner alternative to electro-chemical battery-based energy. We sell stand-alone UPS products as well as complete continuous power and infrastructure solutions, including containerized continuous power systems that we brand as PowerHouse. We sell our products globally through direct, manufacturer&#8217;s representatives, Original Equipment Manufacturer (&#8220;OEM&#8221;) channels and IT partners. Our current principal markets are North America, Europe Middle East and Africa (&#8220;EMEA&#8221;), and Asia.</div><div><br /></div><div style="text-align: justify; text-indent: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">The accompanying condensed consolidated balance sheet as of December 31, 2012, which has been derived from audited financial statements, and the unaudited interim condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles and include the accounts of the Company and its consolidated subsidiaries. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting only of normal recurring items) necessary to present fairly the consolidated financial position of the Company and its consolidated results of operations and cash flows. These interim financial statements should be read in conjunction with the financial statements and accompanying notes included in the Company&#8217;s Annual Report on Form 10-K for the year ended December 31, 2012.</div></div> 755000 767000 182000 170000 25000 8000 388000 388000 0 0 0 0 0 102000 289144000 -144000 19000 -262817000 288619000 322000 25999000 19000 -264238000 21000 -180000 24766000 <div style="font-family: 'Times New Roman', Times, serif; font-size: 10pt;"><div style="text-align: left;"><table cellpadding="0" cellspacing="0" class="DSPFListTable" style="width: 100%; font-family: 'Times New Roman', Times, serif; font-size: 10pt;"><tr><td style="width: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt; vertical-align: top; font-weight: bold; align: right;">7.</td><td style="text-align: left; width: auto; font-family: ''Times New Roman'', Times, serif; font-size: 10pt; vertical-align: top; font-weight: bold;">Subsequent Events</td></tr></table></div><div><br /></div><div style="text-align: justify; text-indent: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">On April 30, 2013, we filed a &#8220;shelf&#8221; registration statement with the United States Securities and Exchange Commission. Under this registration statement, we may, from time to time, sell any combination of the securities described in such registration statement in one or more offerings up to a total dollar amount of $50.0 million. This filing became effective on June 26, 2013.</div><div><br /></div><div style="text-align: left; text-indent: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">On April 11, 2013, Lisa Brown resigned as our Vice President of Marketing and Sales Operations.</div><div><br /></div><div style="text-align: justify; text-indent: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">On September 10, 2013, a purported class action complaint was filed in the United States District Court for the Western District of Texas against the Company and certain of its current and former executives. The case is captioned <font style="font-style: italic; font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">Don Lee v. Active Power, Inc., et. al., </font>Civil Action No. 1:3-cv-00797. The complaint alleges that on April 30, 2013, the Company announced during a conference call that it had entered into a strategic distribution partnership with Digital China. &#160;However, on September 5, 2013, after the close of trading, the Company disclosed that its partnership was with Qiyuan Network System Limited, which is neither an affiliate nor a subsidiary of Digital China. &#160;The complaint asserts claims under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended, and Rule 10b-5 promulgated thereunder, and seeks unspecified damages on behalf of all stockholders.</div><div><br /></div><div style="text-align: justify; text-indent: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">On September 13 and October 14, 2013, two separate stockholders filed complaints in the District Court of Travis County, Texas purporting to bring derivative actions on behalf of the Company against certain current and former officers and directors of the Company. &#160;The first derivative action is captioned <font style="font-style: italic; font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">Okumura v. Almgren, et. al.</font>, Cause No. D-1-GN-13-003230 and the second derivative action is captioned <font style="font-style: italic; font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">David B. Shaev IRA v. Milner, et. al.</font>, Cause No. D-1-GN-13-003557. &#160;The allegations of each derivative complaint mirror those of the class action complaint, and they assert claims for breach of fiduciary duty, unjust enrichment, and/or abuse of control and seek damages on behalf of the Company. &#160;Defendants have entered into an agreement with each of the plaintiffs to stay both of the derivative actions pending the outcome of the motion to dismiss in the securities class action described above.</div><div><br /></div><div style="text-align: left; text-indent: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">As of November 18, 2013 we cannot assess the potential outcome of these lawsuits.</div></div> <div style="font-family: 'Times New Roman', Times, serif; font-size: 10pt;"><div style="text-align: left;"><table cellpadding="0" cellspacing="0" class="DSPFListTable" style="width: 100%; font-family: 'Times New Roman', Times, serif; font-size: 10pt;"><tr><td style="width: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt; vertical-align: top; font-weight: bold; align: right;">3.</td><td style="text-align: left; width: auto; font-family: ''Times New Roman'', Times, serif; font-size: 10pt; vertical-align: top; font-weight: bold;">Supplemental Balance Sheet Information</td></tr></table></div><div><br /></div><div style="text-align: left; text-indent: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt; font-weight: bold;">Restricted Cash</div><div><br /></div><div style="text-align: left; text-indent: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">Our restricted cash balance of $0.1 million as of March 31, 2013 consists primarily of secured performance and deposit guarantees given to customers. 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font-size: 10pt;">)</div></td></tr></table><div><br /></div><div style="text-align: justify; text-indent: 27pt; font-family: ''Times New Roman'', Times, serif; font-size: 10pt;">At March 31, 2013, because collectability was not reasonably assured on shipments to Qiyuan, revenue recognition has been deferred and will be recognized on a cost recovery basis as payments are received. 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