Condensed Statements of Cash Flows - USD ($)	9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Net income (loss)	$ (238,000)	$ 407,000
Adjustments to reconcile net income (loss) to net cash flows used in operating activities:
Depreciation	43,000	62,000
Amoritization of deferred financing costs	6,000	5,000
Stock-based compensation	4,000	36,000
Changes in assets and liabilities:
(Increase) decrease in accounts receivable-trade	(80,000)	48,000
(Increase) decrease in accounts receivable-other	27,000	(37,000)
(Increase) decrease in inventories	40,000	62,000
(Increase) decrease in prepaid expenses and other current assets	1,000	1,000
Increase (decrease) in accounts payable	60,000	(109,000)
Increase (decrease) in accrued expenses	9,000	(180,000)
Increase (decrease) in customer advance	(29,000)	(66,000)
Increase (decrease) in deferred revenue	12,000	(18,000)
Net cash flows provided by (used in) operating activities	(145,000)	211,000
Cash flows from financing activities
Proceeds from issuance of promissory note	150,000
Repayment of promissory note		(50,000)
Repayment of capital lease obligation	(1,000)	(5,000)
Net cash flows provided by (used in) financing activities	149,000	(55,000)
Net change in cash	4,000	156,000
Cash at beginning of period	80,000	75,000
Cash at end of period	84,000	231,000
Supplemental disclosures of cash flow information
Interest paid	$ 243,000	$ 254,000