INCOME TAXES (Details 3) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Current
Inventory	$ 248,000	$ 219,000
Accrued vacation	558,000	668,000
Accrued warranty costs	141,000	126,000
Unearned compensation	1,738,000	1,836,000
Other	470,000	480,000
Deferred income tax assets	3,155,000	3,329,000
Net deferred income taxes	3,155,000	3,329,000
Non-current
Accounts receivable and unbilled costs and fees	125,000	91,000
Inventory	3,935,000	2,199,000
Deferred revenue	1,778,000	1,192,000
Depreciation	(495,000)	(922,000)
Unearned compensation	2,573,000	2,577,000
State credit carryforwards	944,000	1,098,000
Other	409,000	37,000
Deferred income tax assets	9,269,000	6,272,000
Valuation allowance	(944,000)	(1,098,000)
Net deferred income taxes	8,325,000	5,174,000
Tax credit carryforwards
Proceeds receivable related to settlement with Massachusetts Department of Revenue	1,500,000
State and local jurisdiction
Tax credit carryforwards
State credit carryforwards	1,452,000	1,690,000
Unlimited carryforwards amount	$ 201,000	$ 492,000