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Deferred Tax Assets and Liabilities (Detail) (USD $)
Apr. 30, 2013
Apr. 30, 2012
Deferred Tax Assets:    
Federal & State NOL carryforwards $ 620,284  
Foreign NOL carryforwards 85,690 39,783
Reserves and accruals 437,069 605,366
Stock based compensation 125,946 51,201
Inventories 1,116,638 1,148,245
Other intangibles 366,459 (87,310)
Deferred rent 297,550 408,965
Allowance for doubtful accounts 60,795 69,186
Other 166,111 30,296
Total Gross Deferred Tax Assets 3,276,542 2,265,732
Less: Valuation allowance (87,328) (12,342)
Net Deferred Tax Assets 3,189,214 2,253,390
Deferred Tax Liabilities:    
Other intangibles (277,190) (36,648)
Property, machinery & equipment (3,567,695) (3,561,010)
Deferred flat tax liability (Net) (660,230) (292,800)
Total Deferred Tax Liabilities (4,505,115) (3,890,458)
Net Deferred Tax Asset/(Liability) $ (1,315,901) $ (1,637,068)