Income Taxes (Details 1) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets:
Allowance for receivables	$ 72,539	$ 42,861
Deferred revenue	2,939,462	4,198,465
Share-based compensation	3,095,723	3,099,636
Accrued expenses and other liabilities	307,565	362,721
Domestic net operating loss carryforwards	26,023,318	23,386,049
Foreign net operating loss carryforwards	99,544	7,503
Tax credit carryforwards	574,997	574,998
AMT tax credit carryforwards	483,285	484,077
Capital loss carryforwards	77,586	75,607
Fixed assets	554,154	527,881
Intangibles	1,762,519	2,051,230
Sub-total	35,990,692	34,811,028
Valuation allowance	(35,121,608)	(34,625,398)
Total Deferred Tax Assets	869,084	185,630
Deferred Tax Liabilities:
Deferred state income tax	(541,359)	0
Foreign withholding taxes	(128,261)	(111,291)
Total Deferred Tax Liabilities	(669,620)	(111,291)
Net Deferred Tax Assets	$ 199,464	$ 74,339