INCOME TAXES: (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Current:
Federal	$ (284)	$ (131)	$ (370)
State and local	150	11	114
Current Income Tax Expense (Benefit)	(134)	(120)	(256)
Deferred:
Federal	(1,155)	(1,334)	(505)
State and local	388	(305)	(135)
Deferred Income Tax Expense (Benefit)	(767)	(1,639)	(640)
Total provision (benefit) for income taxes	$ (901)	$ (1,759)	$ (896)

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.