Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Revenue:
Contract services	$ 210,047	$ 166,687	$ 421,896	$ 512,177
Product sales	2,509,276	1,923,787	5,946,710	6,161,179
Total Revenues	2,719,323	2,090,474	6,368,606	6,673,356
Operating costs and expenses:
Costs of contract services	127,229	97,094	258,922	447,844
Costs of product sales	2,013,565	1,553,546	3,922,719	4,594,997
Research and development	5,861	10,537	10,671	282,484
Production engineering	1,210,506	874,054	4,407,492	2,534,370
Reimbursement of costs under DOE grant	(937,273)	(546,803)	(3,169,943)	(3,098,747)
Selling, general and administrative	1,149,659	1,045,845	4,438,287	4,046,667
Gain on sale of long-lived asset	0	0	(3,138)	(1,004)
Total Costs and Expenses	3,569,547	3,034,273	9,865,010	8,806,611
Loss before other income (expense)	(850,224)	(943,799)	(3,496,404)	(2,133,255)
Other income (expense):
Interest income	3,386	11,150	19,281	70,803
Other	422	129	979	265,269
Total nonoperating income (expense)	3,808	11,279	20,260	336,072
Net loss	$ (846,416)	$ (932,520)	$ (3,476,144)	$ (1,797,183)
Net loss per common share - basic and diluted	$ (0.03)	$ (0.03)	$ (0.10)	$ (0.05)
Weighted average number of shares of common stock outstanding - basic and diluted	36,326,516	36,137,980	36,284,675	36,030,576