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Income Taxes (Schedule of the Components of Deferred Income Tax Benefit (Expense)) (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Deferred tax (expense) benefit, excluding items below $ 26,193 $ 85,844 $ 60,739
Inventory (257,970) (83,418) 310,477
Operating loss carryforwards 34,465 17,424 788,342
Tax credit carryforwards 35,272 43,398 196,631
Valuation allowance due to changes in net deferred tax asset balances (33,405) (20,457) (23,299)
Deductible equity awards (972) 298,039 127,308
Allowance for accounts receivable (26,808) (63,438) 161,084
Deferred charges (59,028) 838,556 83,755
Reserve for expired product 31,784 217,330 (106,554)
Intangible assets (239,758) (1,023,948) (18,565)
Deferred income tax benefit (expense) $ (490,227) $ 309,330 $ 1,579,918