CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Revenues:
Sales of products	$ 8,715	$ 2,047	$ 16,025	$ 5,060
Services	259	350	715	627
Total Revenues	8,974	2,397	16,740	5,687
Cost of sales:
Cost of product sales	4,820	1,133	10,746	2,850
Cost of services	107	128	238	203
Total cost of sales	4,927	1,261	10,984	3,053
Gross profit	4,047	1,136	5,756	2,634
Selling, general and administrative expenses	836	644	1,424	1,223
Income from operations	3,211	492	4,332	1,411
Other income:
Interest and dividend income	0	0	1	0
Income before provision for income taxes	3,211	492	4,333	1,411
Provision for income taxes	1,247	20	1,699	23
Net income	$ 1,964	$ 472	$ 2,634	$ 1,388
Net income per share:
Basic (in dollars per share)	$ 0.15	$ 0.04	$ 0.20	$ 0.11
Weighted average shares used in computation of net income per share:
Basic (in shares)	12,963	12,963	12,963	12,963