Note 4 -Inventories, net (Detail) - Schedule of inventory (USD $)	Jun. 30, 2012	Mar. 31, 2012
Purchased parts	$ 5,292,049	$ 3,452,832
Work-in-process	1,982,159	1,725,395
Finished goods	27,788	45,748
Less: Inventory reserve	(200,000)	(200,000)
	$ 7,101,996	$ 5,023,975