Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (1,215,000)	$ (4,395,000)	$ (24,000)
Adjustments to reconcile net loss to cash provided by operating activities:
Loss on sale or disposal of assets	63,000	11,000	96,000
Depreciation and amortization	1,978,000	1,520,000	1,243,000
Amortization of debt issue costs and other assets	67,000	57,000	56,000
Share based compensation expense	232,000	665,000	741,000
Provision for allowance for doubtful accounts		130,000
Deferred income tax expense		3,350,000	163,000
Net (increase) decrease in assets:
Accounts receivable	848,000	145,000	(882,000)
Inventories	(116,000)	(2,149,000)	(337,000)
Prepaid expenses and other assets	27,000	(39,000)	22,000
Net increase (decrease) in liabilities:
Customer deposits	2,000	86,000	1,000
Accounts payable	(334,000)	1,036,000	(219,000)
Accrued expenses	(417,000)	306,000	348,000
Deferred rent and other liabilities	85,000	22,000
Net cash provided by operating activities	1,220,000	745,000	1,208,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in equipment and leasehold improvements	(847,000)	(4,303,000)	(4,179,000)
Proceeds from restricted cash		486,000	882,000
Net cash used in investing activities	(847,000)	(3,817,000)	(3,297,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from short term notes payable	600,000	500,000
Net draw down on line of credit	611,000
Payment of short term notes payable	(600,000)	(500,000)
Proceeds from long-term debt, net of costs		2,407,000
Payments on capitalized leases	(77,000)	(44,000)	(2,000)
Principal payments on long-term debt	(504,000)	(352,000)	(210,000)
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	51,000	75,000	215,000
Net cash (used in) provided by financing activities	(206,000)	2,086,000	3,000
Net increase (decrease) in cash	167,000	(986,000)	(2,086,000)
Cash at beginning of year	1,240,000	2,226,000	4,312,000
Cash at end of year	1,407,000	1,240,000	2,226,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest	431,000	362,000	294,000
Income taxes		$ 47,000	$ 8,000