CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jul. 31, 2012	Jul. 31, 2011
Revenues:
Sales of products	$ 3,013	$ 321
Services	277	288
Total Revenues	3,290	609
Cost of sales:
Cost of product sales	1,717	657
Cost of services	75	92
Total cost of sales	1,792	749
Gross profit	1,498	(140)
Selling, general and administrative expenses	579	610
Income (loss) from operations	919	(750)
Other income (expense):
Interest and dividend income	0	1
Other	0	(3)
Income (loss) before provision for income taxes	919	(752)
Provision for income taxes	3	0
Net income (loss)	$ 916	$ (752)
Net income (loss) per share:
Basic (in dollars per share)	$ 0.07	$ (0.06)
Weighted average shares used in computation of net income (loss) per share:
Basic (in shares)	12,963	12,963