Consolidated Statements Of Operations (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Revenue:
Product sales	$ 1,825,351	$ 1,692,276	$ 5,351,287	$ 4,568,795
Contract services	214,898	235,794	679,431	951,807
Total Revenues	2,040,249	1,928,070	6,030,718	5,520,602
Operating costs and expenses:
Costs of product sales	1,053,716	1,529,852	3,134,230	3,331,469
Costs of contract services	153,647	121,624	552,797	518,159
Research and development	44,307	23,190	158,852	55,647
Production engineering	818,460	991,653	2,851,416	3,646,975
Reimbursement of costs under DOE grant	(451,026)	(1,446,356)	(2,576,685)	(3,176,556)
Selling, general and administrative	1,220,184	1,434,241	4,079,660	5,729,741
Impairment of assets under supply agreement	(726,640)	3,833,860	(726,640)	3,833,860
(Gain) loss on disposal of long-lived assets		407	(40,032)	407
Total Costs and Expenses	2,112,648	6,488,471	7,433,598	13,939,702
Loss before other income	(72,399)	(4,560,401)	(1,402,880)	(8,419,100)
Other income:
Interest income	339	5,244	1,409	10,250
Other	6,147	124	6,935	2,835
Total nonoperating income	6,486	5,368	8,344	13,085
Net loss	$ (65,913)	$ (4,555,033)	$ (1,394,536)	$ (8,406,015)
Net loss per common share - basic and diluted	$ 0.00	$ (0.12)	$ (0.04)	$ (0.23)
Weighted average number of shares of common stock outstanding - basic and diluted	36,878,092	36,654,737	36,794,834	36,532,510