CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Cash flows from operating activities:
Net earnings (loss)	$ 396,000	$ (8,000)
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Stock compensation cost amortized	(68,000)	20,000
Depreciation	311,000	249,000
Deferred income taxes	231,000	(2,000)
Termination and payout of stock appreciation rights		(250,000)
Increase (decrease) in cash flows from operations resulting from changes in:
Trade receivables	79,000	(308,000)
Inventories	(351,000)	(426,000)
Prepaid expenses and other assets	(74,000)	(33,000)
Trade accounts payable	(258,000)	169,000
Accrued liabilities	(204,000)	(101,000)
Customer deposits	(41,000)	(29,000)
Net cash provided by (used in) operating activities	21,000	(719,000)
Cash flows from investing activities:
Capital expenditures	(331,000)	(369,000)
Net cash used in investing activities	(331,000)	(369,000)
Cash flows from financing activities:
Principal payments on long-term debt	(101,000)	(104,000)
Proceeds from long-term debt		100,000
Payments on capital lease obligations		(2,000)
Net cash used in financing activities	(101,000)	(6,000)
Net decrease in cash	(411,000)	(1,094,000)
Cash, beginning of period	1,892,000	2,038,000
Cash, end of period	1,481,000	944,000
Cash paid during the year for:
Interest	19,000	21,000
Income taxes	$ 69,000	$ 14,000