Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2013

Stockholders' Equity Note [Abstract]

Share-Based Compensation Expense Related to Stock Options and Restricted Stock

The share-based compensation expense related to stock options and restricted stock of continuing operations included in the accompanying condensed consolidated statements of operations and in the financial information by reportable business segment in Note 12 is:

	Fuel Storage & Vehicle Systems		Corporate		Total
Three Months Ended March 31, 2012:
Cost of product sales	$	8,483	$	—	$	8,483
Research and development	35,847		—		35,847
Selling, general and administrative	4,537		140,288		144,825
Total share-based compensation	$	48,867	$	140,288	$	189,155
Three Months Ended March 31, 2013:
Cost of product sales	$	5,466	$	—	$	5,466
Research and development	22,484		—		22,484
Selling, general and administrative	3,701		80,518		84,219
Total share-based compensation	$	31,651	$	80,518	$	112,169

Schedule of Share-based Compensation, Stock Options, Activity

Below is a summary of the options activity:

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (In Years)
Options outstanding at January 1, 2013	693,672
Granted	—
Forfeited	(23,100	)	$	7.93
Expired	(15,183	)	$	11.86
Options outstanding at March 31, 2013	655,389		$	6.05	7.9
Vested and expected to vest at March 31, 2013	615,320		$	6.31	7.9
Options exercisable at March 31, 2013	183,987		$	16.47	5.2

Warrant Activity and Warrant Outstanding

Warrant activity and warrants outstanding, reportable in the equivalent number of shares of our common stock that can be purchased upon exercise of the warrants, is as follows:

Warrants outstanding at December 31, 2012	38,332,389
Issued—original number	1,545,000
Issued—additional number (1)	1,154,659
Warrants outstanding at March 31, 2013	41,032,048

(1) Associated with reset provisions contained within the October 27, 2006 warrant contracts.

Summary of Outstanding Warrants

A summary of our outstanding warrants as of March 31, 2013 is as follows:

Issue Date	Expiration Date	Shares Subject to Outstanding Warrants	Exercise Price at End of Period		Exercise Price Reset Provision
October 27, 2006	April 27, 2014	4,563,640	$	0.62	(2)
June 22, 2007	December 22, 2014	257,583	$	41.80	(1)
August 25, 2008	August 25, 2015	1,398,964	$	38.60	(3)
August 3, 2009	August 3, 2014	32,005	$	17.00	(1)
September 4, 2009	September 4, 2014	83,476	$	17.00	(1)
April 30, 2010 through July 1, 2010	April 30, 2015 through July 1, 2015	222,217	$	18.20	(1)
July 22, 2010	July 22, 2013	96,859	$	18.20	(1)
October 13, 2010 and October 19, 2010	October 13, 2015 and October 19, 2015	36,197	$	13.40	(1)
January 3, 2011	February 18, 2014	277,777	$	9.00	(1)
January 12, 2011	January 12, 2014	131,892	$	9.20	(1)
February 18, 2011	February 18, 2016	759,370	$	6.57	(1)
February 18, 2011; Series “B”	February 18, 2016	393,933	$	6.00	(1)
May 9, 2011	May 8, 2014	78,455	$	2.92	(1)
May 20, 2011	May 19, 2014	90,313	$	2.92	(1)
June 15, 2011	June 15, 2016	1,445,862	$	3.85	(1)
June 15, 2011	June 15, 2018	45,000	$	3.12	(1)
June 15, 2011	June 15, 2018	120,271	$	3.85	(1)
June 20, 2011	June 20, 2016	57,079	$	3.90	(1)
June 20, 2011	June 20, 2018	132	$	3.90	(1)
July 6, 2011	July 6, 2016	419,729	$	3.85	(1)
August 23, 2011	August 23, 2016	115,000	$	3.85	(1)
September 29, 2011	September 29, 2016	550,703	$	0.83	(3)
October 12, 2011	October 12, 2016	564,348	$	0.83	(3)
October 17, 2011 through October 21, 2011	October 17, 2016 through October 21, 2016	76,555	$	2.64	(1)
November 2, 2011	November 2, 2014	540,000	$	2.12	(1)
December 21, 2011	December 21, 2016	6,315,789	$	1.22	(1)
January 19, 2012	January 19, 2017	132,750	$	1.22	(1)
March 20, 2012; Series “B”	March 20, 2017	5,244,000	$	1.02	(1)
March 21, 2012; Series “B”	March 21, 2017	6,624,000	$	1.02	(1)
May 3, 2012; Series “B”	May 3, 2017	110,450	$	1.02	(1)
June 4, 2012; Series “B”	June 4, 2017	204,450	$	1.02	(1)
May 7, 2012	May 7, 2013	917,839	$	2.12	(1)
May 7, 2012	May 7, 2019	555,556	$	0.90	(1)
May 8, 2012	May 8, 2019	200,000	$	0.90	(1)
June 22, 2012	June 22, 2017	4,029,851	$	0.85	(1)
June 28, 2012	June 28, 2017	719,178	$	0.85	(1)
July 25, 2012	July 25, 2017	2,075,825	$	0.89	(1)
January 24, 2013	July 25, 2018	1,545,000	$	1.00	(4)
Total warrants outstanding at March 31, 2013		41,032,048

(1) No; contract does not provide for an exercise price reset provision.

(2) Yes; contract provides for reset of exercise price along with increase in number of shares in connection with sales of future equity below current exercise price

(3) Yes; contract provides for a price reset provision; however, provision is no longer applicable.

(4) Yes; contract provides for reset of exercise price under certain conditions, subject to a floor of $0.71; contract also provides for the issuance of additional warrants to purchase up to 500,000 shares of common stock if the remaining principal on the January 2013 Bridge Notes is not paid in full on or before July 1, 2013.

Schedule of Stockholders' Equity Note, Shares Available

The number of authorized shares available for future issuance as of March 31, 2013 is as follows:

	Common Stock		Series B Common Stock		Preferred Stock
Shares Authorized	149,900,000		100,000		20,000,000
Less shares issued and outstanding at March 31, 2013	(49,799,198	)	(49,998	)
Less shares designated as of March 31, 2013 for issuance under:
Stock options (1)	(3,776,672	)
Warrants outstanding	(41,032,047	)
Undesignated shares available	55,292,083		50,002		20,000,000

(1) Includes all of the options outstanding plus 3,121,283 shares remaining that are available for issuance under the 2011 Plan.

Condensed Roll-Forward of Stockholders' Equity

The following table provides a condensed roll-forward of stockholders’ equity for the three months ended March 31, 2013:

	Common Stock Shares Outstanding	Total Equity
Balance at January 1, 2013	47,761,119	$	14,222,681
Share-based compensation	—	128,010
Issuance of common stock to investors	2,038,079	1,332,251
Foreign currency translation	—	(155,791		)
Net loss attributable to stockholders	—	(6,903,920		)
Balance at March 31, 2013	49,799,198	$	8,623,231