Stockholders Equity (Deficit) - Summary of Stock Option Plans Activity (Details) - USD ($)	1 Months Ended					6 Months Ended		12 Months Ended
	Jun. 30, 2015	May. 31, 2015	May. 31, 2014	Mar. 31, 2014	Jan. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares, Beginning Balance						595,577
Number of Shares, Granted	12,083	5,000	8,685	249,361	2,094	17,083	260,140
Number of Shares, Exercised						(1,316)
Number of Shares, Forfeited						(1,254)
Number of Shares, Ending Balance	610,090					610,090		595,577
Number of Shares, Vested and expected to vest	597,358					597,358
Number of Shares, Exercisable	356,050					356,050
Weighted-Average Exercise Price Per Share, Beginning Balance						$ 3.71
Weighted-Average Exercise Price Per Share, Granted	$ 13.83	$ 14.64	$ 2.15	$ 2.15	$ 2.15
Weighted-Average Exercise Price Per Share, Exercised						4.24
Weighted-Average Exercise Price Per Share, Forfeited						8.41
Weighted-Average Exercise Price Per Share, Ending Balance	3.99					3.99		$ 3.71
Weighted-Average Exercise Price Per Share, Vested and expected to vest	3.91					3.91
Weighted-Average Exercise Price Per Share, Exercisable	$ 3.38					$ 3.38
Weighted-Average Remaining Contractual Life, Outstanding						7 years 4 months 24 days		7 years 9 months 18 days
Weighted-Average Remaining Contractual Life, Vested and expected to vest						7 years 3 months 18 days
Weighted-Average Remaining Contractual Life, Exercisable						6 years 4 months 24 days
Aggregate Intrinsic Value, Ending Balance	$ 5,449,483					$ 5,449,483
Aggregate Intrinsic Value, Vested and expected to vest	5,379,404					5,379,404
Aggregate Intrinsic Value, Exercisable	$ 3,386,727					$ 3,386,727