Consolidated Statements Of Stockholders Equity - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income [Member]	Retained Earnings [Member]	Total
Balance at Apr. 30, 2013	$ 2	$ 15	$ 100,053	$ 280	$ (93,666)	$ 6,684
Preferred Stock, Shares, Balance at Apr. 30, 2013	1,666,667
Common Stock, Shares, Balance at Apr. 30, 2013		14,717,777
Net loss					(1,558)	(1,558)
Preferred stock dividends			(66)			(66)
Conversion of preferred stock to common stock, value	$ (2)	$ 2
Conversion of note, shares	(1,666,667)	1,666,667
Stock-based compensation			165			165
Balance at Apr. 30, 2014		$ 17	100,152	280	(95,224)	$ 5,225
Common Stock, Shares, Balance at Apr. 30, 2014		16,384,444				16,384,444
Net loss					(1,686)	$ (1,686)
Stock-based compensation			141			141
Balance at Apr. 30, 2015		$ 17	$ 100,293	$ 280	$ (96,910)	$ 3,680
Common Stock, Shares, Balance at Apr. 30, 2015		16,384,444				16,384,444