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INCOME TAXES (Details 3) (USD $)
Apr. 30, 2014
Apr. 30, 2013
Deferred tax assets:    
Allowance for doubtful accounts $ 55,140 $ 70,902
Inventory markdown reserve 0 3,597
Reserve for loss on work-in-progress 0 4,453
Net operating loss carryforward 0 0
Bonus and vacation accruals 725,037 24,570
Non-qualified stock options 76,850 67,050
Foreign tax credit 265,600 132,800
Valuation allowance (1,122,627) (303,372)
Deferred tax assets-current 0 0
Intangible assets 3,068 8,893
Goodwill 35,639 39,210
Property and equipment 0 423,105
Net operating loss carryforward 11,717,526 10,580,984
Valuation allowance (11,700,982) (10,955,925)
Deferred tax assets-long term 55,251 96,267
Deferred tax liabilities:    
Property and equipment (55,251) (90,748)
Intangible assets 0 (5,519)
Goodwill 0 0
Cumulative translation adjustments 0 0
Deferred tax liabilities-long term (55,251) (96,267)
Net deferred tax assets (liabilities) $ 0 $ 0