Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 1,025,000	$ (1,215,000)	$ (4,395,000)
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Loss on sale or disposal of assets	106,000	63,000	11,000
Depreciation and amortization	1,877,000	1,978,000	1,520,000
Amortization of debt issue costs and other assets	72,000	67,000	57,000
Share based compensation expense	400,000	232,000	665,000
Provision for doubtful accounts			130,000
Deferred income tax expense			3,350,000
Net (increase) decrease in assets:
Accounts receivable	(529,000)	848,000	145,000
Inventories	(1,062,000)	(116,000)	(2,149,000)
Prepaid expenses and other assets	(139,000)	27,000	(39,000)
Net increase (decrease) in liabilities:
Customer deposits	13,000	2,000	86,000
Accounts payable	(139,000)	(334,000)	1,036,000
Accrued expenses	(121,000)	(417,000)	306,000
Deferred rent and other liabilities	(13,000)	85,000	22,000
Net cash provided by operating activities	1,490,000	1,220,000	745,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in equipment and leasehold improvements	(1,005,000)	(847,000)	(4,303,000)
Investment in restricted cash	(65,000)		486,000
Net cash used in investing activities	(1,070,000)	(847,000)	(3,817,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from short term notes payable		600,000	500,000
Net (payments) draws on line of credit	(111,000)	611,000
Payment of short term notes payable		(600,000)	(500,000)
Proceeds from long-term debt, net of costs	166,000		2,407,000
Payments on capitalized leases	(90,000)	(77,000)	(44,000)
Principal payments on long-term debt	(538,000)	(504,000)	(352,000)
Shares withheld from former executive for tax payments		(147,000)
Settlement agreement with former executive		(140,000)
Proceeds from issuance of common stock and exercise of stock options	75,000	51,000	75,000
Net cash (used in) provided by financing activities	(498,000)	(206,000)	2,086,000
Net increase (decrease) in cash	(78,000)	167,000	(986,000)
Cash at beginning of year	1,407,000	1,240,000	2,226,000
Cash at end of year	1,329,000	1,407,000	1,240,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest	413,000	431,000	362,000
Income taxes			$ 47,000