INCOME TAXES (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Deferred tax liabilities [Abstract]
Depreciation	$ 0	$ (178)
Deferred tax assets [Abstract]
Depreciation	80	0
Accounts receivable allowance	31	28
Inventory and other allowances	859	1,154
Vacation accruals	93	117
NOL carryforward	41	76
Total gross deferred tax assets	1,104	1,375
Less valuation allowance	0	0
Net deferred tax assets	$ 1,104	$ 1,197
Reconciliation of the federal statutory income tax rate [Abstract]
Statutory federal income tax rate (benefit) expense, net of noncontrolling interest	34.00%	34.00%
State income tax net of federal benefits	0.00%	0.00%
Permanent tax	30.70%	59.15%
Other	14.75%	(9.71%)
Effective tax rate	79.45%	83.44%
Income tax expense [Abstract]
Deferred income tax	$ 93	$ 138
Current income tax (benefit)	0	0
Total income tax expense (benefit)	93	138
Current federal income tax expense (benefit)	0	0
Current state income tax expense (benefit)	0	0
Accrued income taxes	$ 0	$ 0