CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Cash flows from operating activities:
Net loss	$ (2,015,000)	$ (261,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock compensation cost amortized	108,000	61,000
Depreciation	314,000	265,000
Gain on disposal of equipment	(8,000)
Deferred income taxes	679,000	(155,000)
Increase (decrease) in cash flows from operations resulting from changes in:
Trade receivables	(186,000)	(105,000)
Inventories	377,000	(1,036,000)
Prepaid expenses and other assets	20,000	(156,000)
Trade accounts payable	(159,000)	440,000
Accrued liabilities	498,000	(149,000)
Customer deposits	186,000	4,000
Net cash used in operating activities	(186,000)	(1,092,000)
Cash flows from investing activities:
Capital expenditures	(122,000)	(946,000)
Proceeds from disposal of equipment	22,000
Net cash used in investing activities	(100,000)	(946,000)
Cash flows from financing activities:
Principal payments on long-term debt	(132,000)	(99,000)
Payments on capital lease obligations	(55,000)
Proceeds from long-term debt		124,000
Proceeds from line of credit	750,000	465,000
Net cash provided by financing activities	563,000	490,000
Net increase (decrease) in cash	277,000	(1,548,000)
Cash, beginning of period	298,000	1,846,000
Cash, end of period	575,000	298,000
Cash paid during the year for:
Interest	74,000	24,000
Income taxes		101,000
Non-cash investing and financing activities:
Property, plant and equipment reclassified as held for sale	6,000	$ 688,000
Equipment financed with proceeds from capital lease	$ 225,000