CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012	Oct. 31, 2011
Revenues:
Sales of products	$ 2,047	$ 1,693	$ 5,060	$ 2,014
Services	350	251	627	539
Total Revenues	2,397	1,944	5,687	2,553
Cost of sales:
Cost of product sales	1,133	1,314	2,850	1,971
Cost of services	128	63	203	155
Total cost of sales	1,261	1,377	3,053	2,126
Gross profit	1,136	567	2,634	427
Research and development expenses	0	24	0	24
Selling, general and administrative expenses	644	689	1,223	1,299
Income (loss) from operations	492	(146)	1,411	(896)
Other income (expense):
Interest and dividend income	0	1	0	2
Other	0	2	0	(1)
Income (loss) before provision for income taxes	492	(143)	1,411	(895)
Provision for income taxes	20	0	23	0
Net income (loss)	$ 472	$ (143)	$ 1,388	$ (895)
Net income (loss) per share:
Basic (in dollars per share)	$ 0.04	$ (0.01)	$ 0.11	$ (0.07)
Weighted average shares used in computation of net income (loss) per share:
Basic (in shares)	12,963	12,963	12,963	12,963