Stock Option Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Exercised	(75,000)	(56,666)
Exercise of stock options, shares	75,000	56,666
Option Activity for Non-Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Beginning Balance	173,332	239,999
Number of Options, Forfeited or expired	5,000	(66,667)
Number of Options, Ending Balance	16,666	173,332	239,999
Number of Options, Exercisable, Ending Balance	1,666	173,332	234,442
Weighted Averaged Exercise Price, Beginning Balance	$ 0.48	$ 1.56
Weighted Averaged Exercise Price, Ending Balance	$ 1.27	$ 0.48	$ 1.56
Weighted Averaged Exercise Price, Exercisable, Ending Balance	$ 1.24	$ 0.48	$ 1.57
Weighted Average Remaining Contractual Life (Years), Outstanding	7 months 13 days	7 months 2 days	1 year 3 months 26 days
Weighted Average Remaining Contractual Life (Years), Exercisable	7 months 13 days	7 months 2 days
Aggregate Intrinsic Options Value, Beginning Balance	$ 210,833
Aggregate Intrinsic Options Value, Exercisable, Beginning Balance	201,833
Aggregate Intrinsic Options Value, Ending Balance	17,166	210,833
Aggregate Intrinsic Options Value, Exercisable, Ending Balance	1,716	201,833
Number of Options, Exercisable, Beginning Balance	173,332	234,442
Weighted Averaged Exercise Price, Exercisable, Beginning Balance	$ 0.48	$ 1.57
Weighted Averaged Exercise Price, Forfeited	$ 1.15	$ 2.50
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Beginning Balance	1,484,499	1,283,741
Number of Options, Granted	390,470	309,090
Number of Options, Exercised	(312,293)	(56,666)
Number of Options, Forfeited or expired	(90,546)	(51,666)
Number of Options, Ending Balance	1,472,130	1,484,499	1,283,741
Number of Options, Exercisable, Ending Balance	1,036,185	1,115,006
Weighted Averaged Exercise Price, Beginning Balance	$ 1.03	$ 0.79
Weighted Averaged Exercise Price, Granted	$ 2.25	$ 1.62
Weighted Averaged Exercise Price, Exercised	$ 0.93
Weighted Averaged Exercise Price, Forfeited or expired	$ 1.30	$ 0.99
Weighted Averaged Exercise Price, Ending Balance	$ 0.79	$ 1.03	$ 0.79
Weighted Averaged Exercise Price, Exercisable, Ending Balance	$ 1.10	$ 0.99
Weighted Average Remaining Contractual Life (Years), Outstanding	2 years 10 months 17 days	3 years 26 days	3 years 7 months 13 days
Weighted Average Remaining Contractual Life (Years), Granted	5 years	4 years 4 months 17 days
Weighted Average Remaining Contractual Life (Years), Exercisable	2 years 4 months 28 days	2 years 5 months 5 days
Aggregate Intrinsic Options Value, Ending Balance	1,430,231
Aggregate Intrinsic Options Value, Exercisable, Ending Balance	$ 1,244,074
Number of Options, Exercisable, Beginning Balance	1,115,006
Weighted Averaged Exercise Price, Exercisable, Beginning Balance	$ 0.99
Exercise of stock options, shares	312,293	56,666
Vested Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Beginning Balance	1,115,006	849,066
Number of Options, Exercised	(312,293)	(56,666)
Number of Options, Ending Balance	1,036,185	1,115,006
Weighted Averaged Exercise Price, Beginning Balance	$ 0.97	$ 0.81
Weighted Averaged Exercise Price, Exercised	$ 0.93
Weighted Averaged Exercise Price, Forfeited or expired	$ 1.30	$ 0.96
Weighted Averaged Exercise Price, Ending Balance	$ 1.11	$ 0.97
Number of Options, Vested	324,018	369,272
Number of Options, Forfeited	(90,546)	(46,666)
Weighted Averaged Exercise Price, Vested	$ 1.45	$ 1.19
Exercise of stock options, shares	312,293	56,666
Vested Options | Option Activity for Non-Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Beginning Balance	173,332	234,442
Number of Options, Exercised	(15,166)
Number of Options, Forfeited or expired	5,000	667
Number of Options, Ending Balance	16,666	173,332
Weighted Averaged Exercise Price, Beginning Balance	$ 0.48	$ 1.57
Weighted Averaged Exercise Price, Exercised		$ 0.38
Weighted Averaged Exercise Price, Forfeited or expired		$ 2.50
Weighted Averaged Exercise Price, Ending Balance	$ 1.27	$ 0.48
Number of Options, Vested		5,557
Weighted Averaged Exercise Price, Vested			$ 1.27
Exercise of stock options, shares	15,166
Nonvested Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Beginning Balance	369,493	434,675
Number of Options, Granted	390,470	309,090
Number of Options, Ending Balance	435,945	369,493
Weighted Averaged Exercise Price, Beginning Balance	$ 1.22	$ 0.91
Weighted Averaged Exercise Price, Granted	$ 2.18	$ 1.62
Weighted Averaged Exercise Price, Forfeited or expired		$ 1.00
Weighted Averaged Exercise Price, Ending Balance	$ 1.87	$ 1.22
Number of Options, Vested	(324,018)	(369,272)
Number of Options, Forfeited		(5,000)
Weighted Averaged Exercise Price, Vested	$ 1.45	$ 1.19
Nonvested Options | Option Activity for Non-Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Beginning Balance		5,557
Number of Options, Granted	0	0
Weighted Averaged Exercise Price, Beginning Balance		$ 1.27
Number of Options, Vested		(5,557)
Weighted Averaged Exercise Price, Vested		$ 1.27