CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Cash flows from operating activities:
Net earnings (loss)	$ (671,000)	$ (176,000)
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Stock compensation cost amortized	81,000	33,000
Depreciation	233,000	194,000
Deferred income taxes	103,000	(118,000)
Increase (decrease) in cash flows from operations resulting from changes in:
Trade receivables	94,000	219,000
Inventories	(214,000)	(939,000)
Prepaid expenses and other assets	13,000	(75,000)
Trade accounts payable	(415,000)	140,000
Accrued liabilities	324,000	46,000
Customer deposits	(10,000)	(15,000)
Net cash provided by operating activities	(462,000)	(691,000)
Cash flows from investing activities:
Capital expenditures	(52,000)	(338,000)
Net cash used in investing activities	(52,000)	(338,000)
Cash flows from financing activities:
Principal payments on long-term debt	(99,000)	(66,000)
Proceeds from line of credit	750,000	124,000
Payments on capital lease obligations	(26,000)
Net cash provided by (used in) financing activities	625,000	58,000
Net decrease in cash	111,000	(971,000)
Cash, beginning of period	298,000	1,846,000
Cash, end of period	409,000	875,000
Cash paid during the year for:
Interest	53,000	16,000
Income taxes		$ 87,000
Non-cash investing and financing activities:
Equipment financed with proceeds from capital lease	$ 225,000