Stock Appreciation Rights (Details) (USD $)	6 Months Ended		3 Months Ended	6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2013 Stock Appreciation Rights (SARs) [Member]	Oct. 31, 2013 Stock Appreciation Rights (SARs) [Member]	Oct. 31, 2013 Stock Appreciation Rights (SARs) [Member] Maximum [Member]	Oct. 31, 2013 Stock Appreciation Rights (SARs) [Member] Minimum [Member]
SARS Valuation Assumptions [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number			360,000	360,000
Stock Appreciation Rights, Upper Range of Grant Price					$ 0.695
Stock Appreciation Rights, Lower Range of Grant Price						$ 0.208
Stock Appreciation Rights, Weighted Average Grant Price			$ 0.409	$ 0.409
Stock Appreciation Rights, Weighted Average Contractual Life Remaining			4.91	4.91
Stock Appreciation Rights, Weighted Average Market Price				$ 1.200
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate				137.52%
Weighted Average Expected Life			4.42	4.42
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate				1.10%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate				0.00%
Stock Appreciation Rights, Weighted Average Fair Value Price				$ 1.143
Weighted Average Aggregate Fair Value				$ 290,000
Weighted Average Aggregate Intrinsic Value				220,000
Stock Appreciation Rights Recovery			124,000	217,000
Allocated Share-based Compensation Expense	0	217,000
Unrecognized Compensation Expense Related to Non-Vested SARS Granted				68,000
Expected Period to Recognize Compensation Expense Related to Non-Vested SARSs Granted			1.94	1.94
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent			$ 313,000	$ 313,000