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Income Taxes (Schedule of Deferred Tax Assets and Liabilities, Net) (Details) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Deferred Tax Assets    
Net operating loss and tax credits $ 1,159,865 $ 1,025,621
Property and equipment and intangibles 153,361 92,470
Allowance for accounts receivable 74,362 92,977
Reserve for expired product 706,960 735,992
Inventory 1,185,419 1,079,541
Deferred charges 582,480 563,141
Cumulative compensation costs incurred on deductible equity awards 1,251,382 584,212
Total deferred tax assets 5,113,829 4,173,954
Deferred Tax Liabilities    
Intangible assets (2,665,022) (2,500,642)
Net deferred tax assets, before valuation allowance 2,448,807 1,673,312
Less: deferred tax asset valuation allowance (108,318) (94,459)
Net deferred tax assets $ 2,340,489 $ 1,578,853