Consolidated Statements of Cash Flows (USD $)	6 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Cash flows from operating activities:
Net Income (Loss) Attributable to Parent	$ 381,000	$ (131,000)
Adjustments to reconcile net earnings (loss) to net cash provided by (used in) operating activities:
Stock compensation cost amortized	8,000	(111,000)
Depreciation	156,000	144,000
Deferred income taxes	254,000	0
Loss on Impairment	59,000	0
Change in value of stock appreciation rights	9,000	1,000
Trade receivables	570,000	1,401,000
Inventories	(344,000)	53,000
Prepaid expenses and other assets	(28,000)	(35,000)
Trade accounts payable	(300,000)	(15,000)
Accrued liabilities	145,000	68,000
Customer deposits	525,000	(109,000)
Income taxes payable	0	(8,000)
Net cash provided by (used in) operating activities	1,435,000	1,258,000
Cash flows from investing activities:
Capital expenditures	(184,000)	(398,000)
Net cash used in investing activities	(184,000)	(398,000)
Cash flows from financing activities:
Principal payments on long-term debt	(53,000)	(51,000)
Payments on capital lease obligations	(21,000)	(17,000)
Net cash provided by (used in) financing activities	(74,000)	(68,000)
Net increase (decrease) in cash	1,177,000	792,000
Cash, beginning of year	308,000	490,000
Cash, end of year	1,485,000	1,282,000
Interest	22,000	24,000
Income taxes	0	8,000
Capital expenditure	0	(41,000)
Proceeds from capital lease	$ 0	$ 41,000