Consolidated Statement of Operations (USD $)	12 Months Ended
	Apr. 30, 2012	Apr. 30, 2011
Net sales	$ 10,828,000	$ 11,133,000
Cost of goods sold	7,769,000	7,547,000
Gross profit	3,059,000	3,586,000
Engineering	662,000	448,000
Selling, general and administrative	2,366,000	2,441,000
Operating Expenses	3,028,000	2,889,000
Earnings from operations	31,000	697,000
Interest expense, net	47,000	41,000
Earnings before provision for income taxes	(16,000)	656,000
Income Tax Expense (Benefit)	0	(600,000)
Net Income (Loss) Attributable to Parent	$ (16,000)	$ 1,256,000
Earnings Per Share, Basic	$ 0.00	$ 0.21