CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Revenues:
Sales of products	$ 9,316	$ 10,736
Services	1,255	1,348
Total Revenues	10,571	12,084
Cost of sales:
Cost of product sales	6,282	7,792
Cost of services	413	511
Total cost of sales	6,695	8,303
Gross profit	3,876	3,781
Research and development expenses	0	31
Selling, general and administrative expenses	2,325	2,498
Income from operations	1,551	1,252
Other income:
Interest and dividend income	1	2
Other	0	4
Income before (benefit) provision for income taxes	1,552	1,258
(Benefit) provision for income taxes	(1,547)	25
Net income	$ 3,099	$ 1,233
Net income per share:
Basic (in dollars per share)	$ 0.24	$ 0.10
Weighted average shares used in computation of net income per share:
Basic (in shares)	12,963	12,963