Stockholders Equity (Deficit) - Summary of Stock Option Plans Activity (Details) - USD ($)	1 Months Ended		9 Months Ended	12 Months Ended
	Jun. 30, 2015	May. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Ending Balance			590,139
Employee Stock Option | 2014 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Beginning Balance			595,577
Number of Shares, Granted	12,083	5,000	17,083
Number of Shares, Exercised			(13,764)
Number of Shares, Forfeited			(8,757)
Number of Shares, Ending Balance			590,139	595,577
Number of Shares, Vested and expected to vest			580,001
Number of Shares, Exercisable			371,573
Weighted-Average Exercise Price Per Share, Beginning Balance			$ 3.71
Weighted-Average Exercise Price Per Share, Granted	$ 13.83	$ 14.64
Weighted-Average Exercise Price Per Share, Exercised			2.47
Weighted-Average Exercise Price Per Share, Forfeited			5.42
Weighted-Average Exercise Price Per Share, Ending Balance			4.01	$ 3.71
Weighted-Average Exercise Price Per Share, Vested and expected to vest			4.01
Weighted-Average Exercise Price Per Share, Exercisable			$ 3.45
Weighted-Average Remaining Contractual Life, Outstanding			7 years 1 month 6 days	7 years 9 months 18 days
Weighted-Average Remaining Contractual Life, Vested and expected to vest			7 years 1 month 6 days
Weighted-Average Remaining Contractual Life, Exercisable			6 years 3 months 18 days
Exercised			$ 92,582
Aggregate Intrinsic Value, Ending Balance			5,258,488
Aggregate Intrinsic Value, Vested and expected to vest			5,203,992
Aggregate Intrinsic Value, Exercisable			$ 3,508,953