CONSOLIDATED STATEMENTS OF CASHFLOWS	6 Months Ended
	Oct. 31, 2019 USD ($)	Oct. 31, 2018 USD ($)
Cash flows from operating activities:
Net income (loss)	$ 750,000	$ (11,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock compensation cost amortized	54,000	54,000
Depreciation	181,000	169,000
Changes in operating assets and liabilities:
Trade receivables	(123,000)	35,000
Contract assets	(41,000)	(365,000)
Inventories	(359,000)	(927,000)
Prepaid expenses and other assets	(119,000)	49,000
Operating lease right-of-use assets	(115,000)
Trade accounts payable	312,000	549,000
Accrued liabilities	347,000	260,000
Current and long-term operating lease liabilities	(72,000)
Customer deposits	(2,000)	(90,000)
Net cash provided by (used in) operating activities	1,043,000	(277,000)
Cash flows from investing activities:
Capital expenditures	(277,000)	(81,000)
Proceeds from disposal of equipment	1,000
Net cash used in investing activities	(276,000)	(81,000)
Cash flows from financing activities:
Principal payments on long-term debt	(15,000)	(1,625,000)
Principal payments under capital and financing lease obligations	(35,000)	(85,000)
Payments on line of credit	(7,854,000)
Proceeds from long-term debt		815,000
Proceeds from line of credit	7,536,000	825,000
Net cash provided by financing activities	(368,000)	(70,000)
Net increase (decrease) in cash	399,000	(428,000)
Cash, beginning of period	58,000	575,000
Cash, end of period	457,000	147,000
Cash paid during the period for:
Interest	51,000	$ 44,626
Capital leases reclassified from long-term debt to finance lease liabilities	98,000
Deferred lease reclassified from accrued liabilities to operating right-of-use assets	$ 206,000