Common Stock And Warrant Sale And Common Stock Purchase Agreements (Imported)	12 Months Ended
Dec. 31, 2012
Common Stock And Warrant Sale And Common Stock Purchase Agreements [Abstract]
Common Stock And Warrant Sale And Common Stock Purchase Agreements	6. COMMON STOCK AND WARRANT SALE AND COMMON STOCK PURCHASE AGREEMENTS Common Stock Offering. On July 6, 2011 the Company closed the issuance and sale of 15,900,000 shares of its common stock and accompanying warrants to purchase a total of 7,950,000 shares of common stock. A combination of one share of common stock and a five year warrant to purchase 0.5 shares of common stock was sold in the offering for a combined public offering price of $1.58 per share, less underwriting discounts and commissions payable by the Company. The black-scholes valuation of the warrants granted is $11,614,000. The underwriter, JMP Securities LLC, purchased the common stock and warrants at a discounted price of $1.49 per combination, representing a 5.7% discount to the public offering price. Cash proceeds received by the Company, after the payment of underwriter commission and expenses and offering expenses, were approximately $23,538,000. Fletcher International Ltd. We and Fletcher entered into a Securities Purchase Agreement (the "Securities Purchase Agreement") dated October 14, 2009 whereby Fletcher could purchase up to $12,000,000 of our common stock at a price of approximately $2.6423 per share. With each common stock purchase, Fletcher also received a warrant, exercisable for a period of six years, to purchase the number of shares of our common stock equal to the product of 1.25 times the number of shares of our common stock purchased, with an exercise price of $3.30. On October 14, 2009, December 30, 2009 and April 20, 2010 Fletcher purchased a total of 4,541,497 shares of our common stock. Warrants were issued with each stock purchase to purchase a total of 5,676,871 shares of our common stock at an exercise price of $3.3029 per share. The warrants expire between October 14, 2015 and April 20, 2016. The warrants were deemed to have a fair value of approximately $10.2 million at the date of issuance and were recorded as additional paid-in capital. The Company received net proceeds of approximately $11.6 million, after deducting fees and expenses of the offering payable by us. Fletcher is subject to an ownership limitation of 4.95% of the outstanding shares of common stock ("Ownership Limitation"), under which Fletcher is prohibited from consummating any subsequent closing or exercising any warrant where such closing or exercise would cause Fletcher to exceed the Ownership Limitation, or from otherwise exceeding the Ownership Limitation through other avenues, including the purchase of shares in the public market. Energy Opportunity Ltd. On July 14, 2010, we entered into a Common Stock Purchase Agreement with Energy Opportunity Ltd. ("Energy") that provides that Energy is committed at our option to purchase up to $10,000,000 of our common stock over the 24-month term of the agreement. On August 5, 2010 we sold 1,058,201 shares of our common stock under the Purchase Agreement at a negotiated purchase price of $1.89 per share, based on current market prices. On December 29, 2010, we sold 2,890,173 shares of our common stock under the Purchase Agreement at a negotiated purchase price of $1.73 per share, based on current market prices. We have received $6,900,000 in net proceeds from this Purchase Agreement. An additional $3,000,000 remains under the Purchase Agreement.

6. COMMON STOCK AND WARRANT SALE AND COMMON STOCK PURCHASE AGREEMENTS

Common Stock Offering. On July 6, 2011 the Company closed the issuance and sale of 15,900,000 shares of its common stock and accompanying warrants to purchase a total of 7,950,000 shares of common stock. A combination of one share of common stock and a five year warrant to purchase 0.5 shares of common stock was sold in the offering for a combined public offering price of $1.58 per share, less underwriting discounts and commissions payable by the Company. The black-scholes valuation of the warrants granted is $11,614,000. The underwriter, JMP Securities LLC, purchased the common stock and warrants at a discounted price of $1.49 per combination, representing a 5.7% discount to the public offering price. Cash proceeds received by the Company, after the payment of underwriter commission and expenses and offering expenses, were approximately $23,538,000.

Fletcher International Ltd. We and Fletcher entered into a Securities Purchase Agreement (the "Securities Purchase Agreement") dated October 14, 2009 whereby Fletcher could purchase up to $12,000,000 of our common stock at a price of approximately $2.6423 per share. With each common stock purchase, Fletcher also received a warrant, exercisable for a period of six years, to purchase the number of shares of our common stock equal to the product of 1.25 times the number of shares of our common stock purchased, with an exercise price of $3.30. On October 14, 2009, December 30, 2009 and April 20, 2010 Fletcher purchased a total of 4,541,497 shares of our common stock. Warrants were issued with each stock purchase to purchase a total of 5,676,871 shares of our common stock at an exercise price of $3.3029 per share. The warrants expire between October 14, 2015 and April 20, 2016. The warrants were deemed to have a fair value of approximately $10.2 million at the date of issuance and were recorded as additional paid-in capital. The Company received net proceeds of approximately $11.6 million, after deducting fees and expenses of the offering payable by us.

Fletcher is subject to an ownership limitation of 4.95% of the outstanding shares of common stock ("Ownership Limitation"), under which Fletcher is prohibited from consummating any subsequent closing or exercising any warrant where such closing or exercise would cause Fletcher to exceed the Ownership Limitation, or from otherwise exceeding the Ownership Limitation through other avenues, including the purchase of shares in the public market.

Energy Opportunity Ltd. On July 14, 2010, we entered into a Common Stock Purchase Agreement with Energy Opportunity Ltd. ("Energy") that provides that Energy is committed at our option to purchase up to $10,000,000 of our common stock over the 24-month term of the agreement. On August 5, 2010 we sold 1,058,201 shares of our common stock under the Purchase Agreement at a negotiated purchase price of $1.89 per share, based on current market prices. On December 29, 2010, we sold 2,890,173 shares of our common stock under the Purchase Agreement at a negotiated purchase price of $1.73 per share, based on current market prices. We have received $6,900,000 in net proceeds from this Purchase Agreement. An additional $3,000,000 remains under the Purchase Agreement.