CONSOLIDATED STATEMENTS OF CASHFLOWS - USD ($)	12 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ 642,000	$ (2,015,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock compensation cost amortized	108,000	108,000
Depreciation resulting from the leased property	353,000	314,000
Gain on disposal of equipment		(8,000)
Deferred income taxes	34,000	679,000
Changes in operating assets and liabilities:
Trade receivables	(397,000)	(186,000)
Contract assets	(1,002,000)
Inventories	(692,000)	377,000
Prepaid expenses and other assets	109,000	20,000
Trade accounts payable	580,000	(159,000)
Accrued liabilities	7,000	498,000
Customer deposits	(195,000)	186,000
Net cash used in operating activities	(453,000)	(186,000)
Cash flows from investing activities:
Capital expenditures	(152,000)	(122,000)
Proceeds from disposal of equipment	2,000	22,000
Net cash used in investing activities	(150,000)	(100,000)
Cash flows from financing activities:
Principal payments on long-term debt	(1,677,000)	(132,000)
Payments on capital lease obligations	(71,000)	(55,000)
Payments on line of credit	(4,581,000)
Proceeds from long-term debt	859,000
Proceeds from line of credit	5,556,000	750,000
Net cash provided by financing activities	86,000	563,000
Net increase (decrease) in cash	(517,000)	277,000
Cash, beginning of period	575,000	298,000
Cash, end of period	58,000	575,000
Cash paid during the period for:
Interest	108,000	74,000
Non-cash investing and financing activities:
Property, plant and equipment reclassified as held for sale		6,000
Property held for sale reclassified as property, plant and equipment	$ 694,000
Equipment financed with proceeds from capital lease		$ 225,000