Condensed Balance Sheets (USD $)	Jun. 30, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 13,440,032	$ 11,298,885
Investments	0	12,616,097
Trade receivables, net of allowance for doubtful accounts of $5,839	127,883	342,087
Inventories	2,308,735	2,469,123
Prepaid expenses and other current assets	534,386	386,624
Total current assets	16,411,036	27,112,816
Property, Plant and Equipment:	42,790,281	36,897,531
Less accumulated depreciation and amortization	(10,940,731)	(7,964,875)
Net property, plant and equipment	31,849,550	28,932,656
Other Assets:
Restricted cash	468,662	1,427,053
Deposits on manufacturing equipment	561,812	3,582,883
Patents, net of amortization of $37,665 and $28,248, respectively	346,004	308,785
Other non-current assets	58,438	60,312
Total Other Assets	1,434,916	5,379,033
Total Assets	49,695,502	61,424,505
Current Liabilities:
Accounts payable	485,447	658,834
Accrued expenses	1,731,902	1,846,997
Accrued property, plant and equipment	336,825	1,626,317
Current portion of long-term debt	256,358	648,059
Total current liabilities	2,810,532	4,780,207
Long-Term Debt	6,484,782	6,615,070
Accrued Warranty Liability	26,660	26,660
Commitments and Contingencies
Stockholders' Equity:
Preferred stock, $0.0001 par value, 25,000,000 shares authorized, no shares outstanding	0	0
Common stock, $0.0001 par value, 125,000,000 shares authorized; 41,318,928 and 39,345,459 shares issued and outstanding, respectively	4,132	3,935
Additional paid in capital	234,792,704	233,004,550
Deficit accumulated during the development stage	(194,423,308)	(183,006,936)
Accumulated other comprehensive income (loss)	0	1,019
Total stockholders' equity	40,373,528	50,002,568
Total Liabilities and Stockholders' Equity	$ 49,695,502	$ 61,424,505