SUPPLEMENTAL DATA SCHEDULE II (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Allowance for Doubtful Accounts [Member]
Balance Beginning of Period	$ 168,554	$ 175,804	$ 185,407
Charged to Costs and Expenses	0	0	20,143
Reduction to Allowance for Write off	(8,248)	(8,323)	(29,746)
Credited to Costs and Expenses	20,000	1,073	0
Balance at End of Period	180,306	168,554	175,804
Valuation Allowance of Deferred Tax Assets [Member]
Balance Beginning of Period	3,865,695	3,480,475	4,113,034
Charged to Costs and Expenses	(626,777)	0	(632,559)
Reduction to Allowance for Write off	(1,619,459)	0	0
Credited to Costs and Expenses	0	385,220	0
Balance at End of Period	1,619,459	3,865,695	3,480,475
Inventory Reserve Member [Member]
Balance Beginning of Period	663,000	451,001	349,069
Charged to Costs and Expenses	104,175	398,000	101,932
Reduction to Allowance for Write off	(264,175)	(186,001)	0
Credited to Costs and Expenses	0	0	0
Balance at End of Period	$ 503,000	$ 663,000	$ 451,001