Statement of Cash Flows - USD ($)	9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income (loss)	$ 68,000	$ (460,000)
Adjustments to reconcile net income (loss) to net cash flows used in operating activities:
Depreciation	43,000	38,000
Amoritization of deferred financing costs	5,000	5,000
Stock-based compensation	19,000	300,000
Changes in assets and liabilities:
(Increase) decrease in accounts receivable-trade	(234,000)	(21,000)
(Increase) decrease in accounts receivable-other	127,000	(90,000)
(Increase) decrease in inventories	55,000	(115,000)
(Increase) decrease in prepaid expenses and other current assets		1,000
Increase (decrease) in accounts payable	(9,000)	24,000
Increase (decrease) in accrued expenses	(32,000)	25,000
Increase (decrease) in customer advance	(52,000)	326,000
Increase (decrease) in deferred revenue	12,000	12,000
Net cash flows provided by (used in) operating activities	2,000	45,000
Cash flows from investing activities
Purchase of equipment	(24,000)	(10,000)
Net cash flows provided by (used in) investing activities	(24,000)	(10,000)
Cash flows from financing activities
Repayment of promissory note	(5,000)	(5,000)
Net cash flows provided by (used in) financing activities	(5,000)	(5,000)
Net change in cash	(27,000)	30,000
Cash at beginning of period	120,000	27,000
Cash at end of period	93,000	57,000
Supplemental disclosures of cash flow information
Interest paid	$ 280,000	$ 279,000