Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenue	$ 524,577	$ 165,540	$ 970,129	$ 401,020
Cost of goods sold (exclusive of items shown separately below)	325,294	72,048	631,091	255,141
Gross profit	199,283	93,492	339,038	145,879
Operating expenses:
Operations and maintenance	1,186,942	823,184	1,810,632	1,790,166
Research and development	1,402,500	1,889,331	2,632,432	3,961,768
Selling, general and administrative	2,915,922	2,430,113	5,348,462	4,375,648
Loss on contract commitments		(99,650)		(99,650)
Depreciation and amortization	903,043	545,642	1,689,014	1,075,478
Total operating expenses	6,408,407	5,588,620	11,480,540	11,103,410
Loss from operations	(6,209,124)	(5,495,128)	(11,141,502)	(10,957,531)
Other income (expense):
Interest income	2,369	779	7,343	9,627
Interest expense	(216,242)	(58,611)	(917,502)	(144,962)
Non-cash interest income related to preferred stock and associated warrants	2,018,258		2,467,876
Loss on extinguishment of debt	(876,880)		(7,379,465)
Other income (expense)	(12,593)	1,891	(55,201)	1,891
Total other income (expense), net	914,912	(55,941)	(5,876,949)	(133,444)
Net loss	$ (5,294,212)	$ (5,551,069)	$ (17,018,451)	$ (11,090,975)
Loss per share, basic and diluted (in dollars per share)	$ (0.18)	$ (0.29)	$ (0.67)	$ (0.61)
Weighted-average common shares outstanding - basic (in shares)	26,441,665	18,531,901	25,259,796	18,045,020
Weighted-average common shares outstanding - diluted (in shares)	26,441,665	18,531,901	25,259,796	18,045,020