CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Cash flows from operating activities:
Net earnings (loss)	$ (364,000)	$ 15,000
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Stock compensation cost amortized	54,000	11,000
Depreciation	149,000	130,000
Deferred income taxes	(226,000)	12,000
Increase (decrease) in cash flows from operations resulting from changes in:
Trade receivables	(115,000)	560,000
Inventories	(202,000)	(525,000)
Prepaid expenses and other assets	54,000	(88,000)
Trade accounts payable	(201,000)	28,000
Accrued liabilities	200,000	(240,000)
Customer deposits	(22,000)	(11,000)
Net cash provided by operating activities	(673,000)	(108,000)
Cash flows from investing activities:
Capital expenditures	(51,000)	(275,000)
Net cash used in investing activities	(51,000)	(275,000)
Cash flows from financing activities:
Principal payments on long-term debt	(66,000)	(44,000)
Proceeds from line of credit	750,000
Payments on capital lease obligations	(11,000)
Net cash provided by (used in) financing activities	673,000	(44,000)
Net decrease in cash	(51,000)	(427,000)
Cash, beginning of period	298,000	1,846,000
Cash, end of period	247,000	1,419,000
Cash paid during the year for:
Interest	25,000	11,000
Income taxes		$ 87,000
Non-cash investing and financing activities:
Equipment financed with proceeds from capital lease	$ 225,000