Summary of Significant Accounting Policies (Details Textual) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 10, 2015	Dec. 31, 2011
Summary Of Significant Accounting Policies [Line Items]
Depreciation, Depletion and Amortization, Nonproduction	$ 1,024,257	$ 844,093	$ 573,712
Share-based Compensation, Total	608,645	538,304	458,167
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		152,650	191,597
Common Stock, Dividends, Per Share, Declared	$ 0.60	$ 0.60	$ 0.60
Cash and Cash Equivalents, at Carrying Value, Total	3,612,153	3,970,512	3,065,785		5,564,233
Fair Value, Inputs, Level 1 [Member]
Summary Of Significant Accounting Policies [Line Items]
Cash and Cash Equivalents, at Carrying Value, Total		400,000
Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage	10.00%	10.00%	10.00%
Subsequent Event [Member]
Summary Of Significant Accounting Policies [Line Items]
Common Stock, Dividends, Per Share, Declared				$ 0.15
Dividends Payable				806,000
Patents [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization	26,024	28,078	13,256
Legal Cost Capitalized	656,438	497,857	299,389
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	50,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	50,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	50,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	50,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	50,000
Software Development [Member]
Summary Of Significant Accounting Policies [Line Items]
Software Development Cost Capitalized	403,000	715,000
Amortization	$ 223,568	$ 145,251	$ 98,301