CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Apr. 30, 2012	Apr. 30, 2011
Revenues:
Sales of products	$ 10,736	$ 4,897
Services	1,348	989
Total Revenues	12,084	5,886
Cost of sales:
Cost of product sales	7,792	4,348
Cost of services	511	159
Total cost of sales	8,303	4,507
Gross profit	3,781	1,379
Research and development expenses	31	0
Selling, general and administrative expenses	2,498	2,357
Income (loss) from operations	1,252	(978)
Other income:
Interest and dividend income	2	5
Other	4	12
Income (loss) before provision for (benefit of) income taxes	1,258	(961)
Provision for (benefit of) income taxes	25	(10)
Net income (loss)	$ 1,233	$ (951)
Net income (loss) per share:
Basic	$ 0.10	$ (0.07)
Weighted average shares used in computation of net income (loss) per share:
Basic	12,963	12,963