Note 4 - Inventories, net (Detail) - Schedule of Inventory (USD $)	Dec. 31, 2012	Mar. 31, 2012
Purchased parts	$ 5,201,484	$ 3,452,832
Work-in-process	1,791,992	1,725,395
Finished goods	10,555	45,748
Less: Inventory reserve	(200,000)	(200,000)
	$ 6,804,031	$ 5,023,975