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Income Taxes (Schedule of Deferred Tax Assets and Liabilities, Net) (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Deferred Tax Assets    
Net operating loss and tax credits $ 2,274,994 $ 2,205,260
Property and equipment and intangibles 326,499 300,301
Allowance for accounts receivable 145,200 172,008
Reserve for expired product 849,579 817,736
Inventory 1,154,507 1,412,477
Deferred charges 660,973 1,504,835
Cumulative compensation costs incurred on deductible equity awards 1,675,757 1,676,729
Total deferred tax assets 7,087,509 8,089,346
Deferred Tax Liabilities    
Intangible assets (3,162,502) (3,707,535)
Net deferred tax assets, before valuation allowance 3,925,007 4,381,811
Less: deferred tax asset valuation allowance (185,497) (152,074)
Net deferred tax assets $ 3,739,510 $ 4,229,737