CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Revenues:
Sales of products	$ 740	$ 8,715	$ 3,297	$ 16,025
Services	363	259	679	715
Total revenues	1,103	8,974	3,976	16,740
Cost of sales:
Cost of product sales	812	4,820	2,700	10,746
Cost of services	79	107	182	238
Total cost of sales	891	4,927	2,882	10,984
Gross profit	212	4,047	1,094	5,756
Research and development expenses	162	0	312	0
Selling, general and administrative expenses	646	836	1,303	1,424
(Loss) income from operations	(596)	3,211	(521)	4,332
Other income:
Interest and dividend income	0	0	0	1
Other	0	0	1	0
(Loss) income before (benefit) provision for income taxes	(596)	3,211	(520)	4,333
(Benefit) provision for income taxes	(3)	1,247	3	1,699
Net (loss) income	$ (593)	$ 1,964	$ (523)	$ 2,634
Net (loss) income per share:
Basic (in dollars per share)	$ (0.05)	$ 0.15	$ (0.04)	$ 0.20
Weighted average shares used in computation of net (loss) income per share:
Basic (in shares)	12,963	12,963	12,963	12,963