CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Cash flows from operating activities:
Net earnings (loss)	$ (193,000)	$ 125,000
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Stock compensation cost amortized	27,000
Depreciation	77,000	63,000
Deferred income taxes	(114,000)	86,000
Increase (decrease) in cash flows from operations resulting from changes in:
Trade receivables	361,000	(86,000)
Inventories	(237,000)	(236,000)
Prepaid expenses and other assets	34,000	(37,000)
Trade accounts payable	250,000	89,000
Accrued liabilities	247,000	111,000
Customer deposits	2,000	(19,000)
Net cash provided by operating activities	454,000	96,000
Cash flows from investing activities:
Capital expenditures	(7,000)	(187,000)
Net cash used in investing activities	(7,000)	(187,000)
Cash flows from financing activities:
Principal payments on long-term debt	(33,000)	(22,000)
Net cash used in financing activities	(33,000)	(22,000)
Net increase (decrease) in cash	414,000	(113,000)
Cash, beginning of period	298,000	1,846,000
Cash, end of period	712,000	1,733,000
Cash paid during the year for:
Interest	$ 11,000	6,000
Income taxes		$ 19,150