4. Inventories (Details) - Schedule of Inventory, Current (USD $)	Mar. 31, 2013	Mar. 31, 2012
Schedule of Inventory, Current [Abstract]
Purchased parts	$ 4,418,989	$ 3,452,832
Work-in-process	1,636,325	1,725,395
Finished goods	385,867	45,748
Less: Allowance for obsolete inventory	(200,000)	(200,000)
	$ 6,241,181	$ 5,023,975