INCOME TAXES - NET DEFERRED TAX ASSETS (Details) - USD ($)	Mar. 31, 2016	Mar. 31, 2015
Current
Inventory		$ 150,000
Accrued vacation		571,000
Accrued warranty costs		57,000
Accrued contract costs		168,000
Unearned compensation		1,407,000
Other		133,000
Deferred income tax assets		2,486,000
Net deferred income taxes		2,486,000
Non-current
Accounts receivable and unbilled costs and fees	$ 277,000	119,000
Inventory	3,293,000	2,964,000
Deferred revenue	330,000	1,265,000
Accrued vacation	468,000
Accrued warranty costs	60,000
Depreciation	1,127,000	569,000
Accrued contract costs	(660,000)	(905,000)
Unearned compensation	2,749,000	2,295,000
State net operating losses and credit carryforwards	1,592,000	1,334,000
Research and development credits	403,000
Other	23,000
Other		(355,000)
Deferred income tax assets	9,662,000	7,286,000
Valuation allowance	(1,481,000)	(1,334,000)
Net deferred income tax assets	8,181,000	5,952,000
State
Tax credit carryforwards
Tax credit carryforwards	2,244,000	2,053,000
Unlimited carryforwards amount	308,000	244,000
Net operating loss carryforwards	14,742,000	$ 8,062,000
Foreign
Tax credit carryforwards
Tax credit carryforwards	$ 178,000