Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 266,000	$ (2,123,000)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization	1,458,000	1,421,000
Amortization of debt issue costs and other assets	51,000	57,000
Amortization of operating leases right-of-use assets	219,000
Share-based compensation expense	392,000	282,000
Net (increase) decrease in assets:
Accounts receivable	401,000	781,000
Inventories	68,000	(1,078,000)
Prepaid expenses and other assets	93,000	(84,000)
Net increase (decrease) in liabilities:
Accounts payable	(2,222,000)	528,000
Accrued expenses	(91,000)	181,000
Customer deposits	(217,000)	39,000
Operating lease obligations	(214,000)
Deferred rent and other liabilities		(46,000)
Net cash provided by (used in) operating activities	204,000	(42,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in equipment and leasehold improvements	(180,000)	(375,000)
Cash paid to acquire Cellana assets		(100,000)
Net cash used in investing activities	(180,000)	(475,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on short-term contract obligation	(247,000)	(63,000)
Net draws on line of credit		1,250,000
Proceeds from long-term debt - related party	1,500,000
Principal payments on long-term debt	(443,000)	(429,000)
Payments on finance leases	(44,000)	(49,000)
Shares withheld for tax payments	(25,000)	(32,000)
Proceeds from exercise of stock options	4,000	19,000
Net cash provided by financing activities	745,000	696,000
Net increase in cash	769,000	179,000
Cash and restricted cash at beginning of period	840,000	1,394,000
Cash and restricted cash at end of period	1,609,000	1,573,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest	499,000	358,000
Income taxes		17,000
Non-cash financing activities:
Cash paid to acquire Cellana assets		100,000
RECONCILIATION OF CASH AND RESTRICTED CASH AT BEGINNING OF PERIOD:
Cash	840,000	1,329,000
Restricted cash	0	65,000
Cash and restricted cash at beginning of period	840,000	1,394,000
Cellana Asset Purchase [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash paid to acquire Cellana assets		(100,000)
Non-cash financing activities:
Purchase of Cellana assets		495,000
Less: Issuance of short-term contract obligation		(395,000)
Cash paid to acquire Cellana assets		$ 100,000