NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Accounts Receivable and Unbilled Costs and Fees
Accounts receivable and unbilled costs and fees attributable to both prime and subcontracts with federal and state governments	$ 6,696,000	$ 15,961,000
Inventories
Raw materials, completed sub-assemblies, and spare parts	20,334,000	18,482,000
Work-in-process	17,853,000	13,199,000
Finished goods	2,796,000	1,254,000
Total	40,983,000	32,935,000
Allowance for doubtful accounts
Activity
Balance at Beginning of Year	323,000	351,000	255,000
Charged to Costs and Expenses	10,000	(27,000)	344,000
Deductions or Write-offs Charged to Reserves		1,000	248,000
Balance at End of Year	333,000	323,000	351,000
Reserve for excess or obsolete inventory
Activity
Balance at Beginning of Year	10,865,000	11,052,000	6,210,000
Charged to Costs and Expenses	664,000	1,355,000	5,061,000
Deductions or Write-offs Charged to Reserves	3,235,000	1,542,000	219,000
Balance at End of Year	$ 8,294,000	$ 10,865,000	$ 11,052,000