Consolidated Statements of Cash Flows (USD $)	3 Months Ended
	Jul. 31, 2011	Jul. 31, 2010
Cash flows from operating activities:
Net earnings (loss)	$ (259,000)	$ 215,000
Adjustments to reconcile net earnings (loss) to net cash used in operating activities:
Stock compensation earned	3,000	12,000
Depreciation	71,000	31,000
Change in value of stock appreciation rights	(11,000)	7,000
Increase (decrease) in cash flows from operations resulting from changes in:
Trade receivables	915,000	(326,000)
Inventories	68,000	(56,000)
Prepaid expenses and other assets	(77,000)	(66,000)
Trade accounts payable	(135,000)	294,000
Accrued liabilities	(81,000)	(110,000)
Customer deposits	(233,000)	(255,000)
Income taxes payable	(8,000)	0
Net cash provided by operating activities	253,000	(254,000)
Cash flows from investing activities:
Payments to Acquire Property, Plant, and Equipment	(72,000)	(47,000)
Net cash used in investing activities	(72,000)	(47,000)
Cash flows from financing activities:
Principal payments on long-term debt	(25,000)	(19,000)
Payments on capital lease obligations	(8,000)	(6,000)
Net cash provided by (used in) financing activities	(33,000)	(25,000)
Net increase (decrease) in cash	148,000	(326,000)
Cash, beginning of period	490,000	1,030,000
Cash, end of period	638,000	704,000
Supplemental Disclosures of Cash Flow Information:
Cash paid during the period for interest	12,000	10,000
Cash paid during the period for income taxes	8,000	0
Non-cash investing and financing activities:
Capital expenditure	(41,000)	(13,000)
Proceeds from capital lease	$ 41,000	$ 13,000