Consolidated Statement of Operations (USD $)	3 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Net sales	$ 2,695,000	$ 3,485,000
Cost of goods sold	1,857,000	2,178,000
Gross profit	838,000	1,307,000
Engineering	177,000	147,000
Selling, general and administrative	841,000	872,000
Operating Expenses	1,018,000	1,019,000
Earnings from operations	(180,000)	288,000
Interest expense, net	7,000	9,000
Earnings before provision for income taxes	(187,000)	279,000
Income Tax Expense (Benefit)	(72,000)	107,000
Net Income (Loss) Attributable to Parent	$ (115,000)	$ 172,000
Earnings Per Share, Basic		$ 0.03