Consolidated Statement of Changes in Stockholders' Equity (USD $)	Total	Common Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Stockholders' Equity at Period Start at Apr. 30, 2010	$ 2,012,000		$ 60,000	$ 12,395,000	$ (10,424,000)	$ (19,000)
Common Stock, Shares, Outstanding at Apr. 30, 2010		5,983,545
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		0
Stock compensation cost amortized	45,000		0	45,000	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period		0
Restricted Stock Cancelled	(15,000)		0	(15,000)	0	0
Net Income (Loss) Attributable to Parent	1,256,000	1,256,000	0	0	1,256,000	0
Stockholders' Equity at Period End at Apr. 30, 2011	3,298,000		60,000	12,425,000	(9,168,000)	(19,000)
Common Stock, Shares, Outstanding at Apr. 30, 2011	5,828,650	5,983,545
Stock compensation cost amortized	11,000		0	11,000	0	0
Restricted Stock Cancelled	(117,000)		0	(117,000)	0	0
Net Income (Loss) Attributable to Parent	(16,000)	(16,000)	0	0	(16,000)	0
Stockholders' Equity at Period End at Apr. 30, 2012	$ 3,176,000		$ 60,000	$ 12,319,000	$ (9,184,000)	$ (19,000)
Common Stock, Shares, Outstanding at Apr. 30, 2012	5,515,750	5,983,545