Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (2,123,000)	$ 2,083,000
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	1,421,000	1,403,000
Share-based compensation expense	282,000	369,000
Amortization of debt issue costs and other assets	57,000	52,000
Net (increase) decrease in assets:
Accounts receivable	781,000	(791,000)
Inventories	(1,078,000)	(1,730,000)
Prepaid expenses and other assets	(84,000)	(86,000)
Net increase (decrease) in liabilities:
Accounts payable	528,000	(76,000)
Accrued expenses	181,000	332,000
Customer deposits	39,000	(80,000)
Other long-term liabilities	(46,000)	(8,000)
Net cash (used in) provided by operating activities	(42,000)	1,468,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in equipment and leasehold improvements	(375,000)	(667,000)
Investment in Cellana asset purchase	(100,000)
Investment in restricted cash		(65,000)
Net cash used in investing activities	(475,000)	(732,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net draws (payments) on line of credit	1,250,000	(111,000)
Payments on short term contract obligation	(63,000)
Payments on capitalized leases	(49,000)	(67,000)
Principal payments on long-term debt	(429,000)	(394,000)
Proceeds from long-term debt, net of costs		166,000
Withholding on restricted stock unit vesting	(32,000)
Proceeds from stock options exercised	19,000	26,000
Net cash provided by (used in) financing activities	696,000	(380,000)
Net increase in cash	179,000	356,000
Cash and restricted cash at beginning of period	1,394,000	1,407,000
Cash at end of period	1,573,000	1,763,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest	358,000	313,000
Income taxes	17,000
Cash paid to acquire Cellana assets	100,000
Cellana Asset Purchase [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in Cellana asset purchase	(100,000)
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Purchase of Cellana assets	495,000
Less: Issuance of short-term obligation	395,000
Cash paid to acquire Cellana assets	$ 100,000