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Income Taxes (Schedule of Deferred Tax Assets and Liabilities, Net) (Details) - USD ($)
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Deferred Tax Assets      
Net operating loss and tax credits $ 15,295,547   $ 3,881,415
Property and equipment and intangibles 232,667   331,301
Allowance for accounts receivable 129,180   170,733
Reserve for expired product 538,141   771,034
Inventory 173,885   214,654
Deferred charges 624,367   738,541
Cumulative compensation costs incurred on deductible equity awards 793,206   639,263
Total deferred tax assets 17,786,993   6,746,941
Deferred Tax Liabilities      
Intangible assets (2,067,548)   (3,238,511)
Net deferred tax assets, before valuation allowance 15,719,445   3,508,430
Less: deferred tax asset valuation allowance (15,632,235) $ (15,900,000) (388,500)
Net deferred tax assets $ 87,210   $ 3,119,930