INCOME TAXES (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2013
Deferred tax liabilities [Abstract]
Depreciation	$ (178)	$ (352)
Deferred tax assets [Abstract]
Accounts receivable allowance	28	28
Inventory and other allowances	1,154	1,548
Vacation accruals	117	111
NOL Carryforward	76	0
Total gross deferred tax assets	1,375	1,687
Less valuation allowance	0	0
Net deferred tax assets	$ 1,197	$ 1,335
Reconciliation of the federal statutory income tax rate [Abstract]
Statutory federal income tax rate (benefit) expense, net of noncontrolling interest (in hundredths)	34.00%	34.00%
State income tax net of federal benefits (in hundredths)	0.00%	0.00%
Permanent tax (in hundredths)	59.15%	26.90%
Other (in hundredths)	(9.71%)	(38.00%)
Effective tax rate (in hundredths)	83.44%	22.90%
Provision (benefit) for Income taxes
Deferred income tax (benefit)	$ 138	$ (33)	$ (136)
Current income tax (benefit)	0	66	(680)
Total income tax expense (benefit)	138	33	$ (816)
Current federal income tax expense	0	66
Current state income tax expense	0	0
Accrued income taxes	$ 0	$ 0