Note 4 - Inventories, net (Details) - Schedule of Inventory, Current - USD ($)	Jun. 30, 2015	Mar. 31, 2015
Schedule of Inventory, Current [Abstract]
Purchased parts	$ 3,065,974	$ 2,746,671
Work-in-process	1,658,180	1,514,356
Finished goods	34,678	334
Less: Inventory reserve	(235,000)	(229,287)
	$ 4,523,832	$ 4,032,074