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Income Taxes (Schedule of the Components of Deferred Income Tax Benefit (Expense)) (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Abstract]      
Deferred tax (expense) benefit, excluding items below $ (39,870) $ 439,744 $ 459,575
Inventory write-downs 179,755 817,840 31,228
Creation of operating loss carryforwards 25,552 11,348 9,567
Creation (utilization) of tax credit carryforwards 108,699 56,395 (3,115)
Change in valuation allowance due to changes in net deferred tax asset balances (15,291) (13,597) (10,750)
Deductible equity awards 667,171 (330,329) (132,193)
Intangible assets (164,380) (2,646,511) (21,963)
Deferred income tax benefit (expense) $ 761,636 $ (1,665,110) $ 332,349