Note 4 - Inventories, net (Tables)

6 Months Ended

Sep. 30, 2013

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of:

	September 30, 2013			March 31, 2013
Purchased parts	$	3,845,654		$	4,418,989
Work-in-process		1,020,630			1,636,325
Finished goods		45,756			385,867
Less: Inventory reserve		(200,000	)		(200,000	)
	$	4,712,040		$	6,241,181