Stock Incentive Plans (Details) - USD ($)		1 Months Ended	12 Months Ended
	May. 12, 2015	Jul. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 30, 2014
Shares Available for Grant
Beginning balance (in shares)			119,077
Ending balance (in shares)			106,833	119,077
Stock Options Outstanding
Beginning balance (in shares)			659,554
Ending balance (in shares)			919,506	659,554
RSUs Outstanding
Beginning balance (in shares)			68,902
Ending balance (in shares)			55,536	68,902
Options vested, exercisable and expected to vest
Options vested and exercisable (in shares)			413,063
Options vested and exercisable (in dollars per share)			$ 3.96
Options vested and exercisable (in years)			8 years 7 months 6 days
Options vested and expected to vest (in shares)			776,470
Options vested and expected to vest (in dollars per share)			$ 3.83
Options vested and expected to vest (in years)			8 years 9 months 22 days
Weighted average grant date fair value of stock options granted (in dollars per share)			$ 2.90	$ 1.55
Number of options vested (in shares)			413,063	0
Fair value of options vested on grant date			$ 893,974
Intrinsic value of options exercised			$ 0
Fair market value of options exercised (in dollars per share)			$ 2.25
2013 Plan
Stock Incentive Plans
Number of shares reserved for issuance				547,533
Shares Available for Grant
Beginning balance (in shares)			119,077	300,000
Shares Authorized (in shares)				547,533
Options available for grant cancelled upon IPO (in shares)			(51,863)
Ending balance (in shares)				119,077	300,000
Stock Options Outstanding
Beginning balance (in shares)			659,554
Options Granted (in shares)			176,364	753,110
Options Cancelled (in shares)			(95,784)	(93,556)
Options Cancelled post-IPO not rolled back into the 2013 Plan (in shares)			(42,128)
Options Exercised (in shares)			(5,000)
Ending balance (in shares)			693,006	659,554
RSUs Outstanding
Beginning balance (in shares)			68,902
RSUs Granted (in shares)			1,484	79,297
RSUs Cancelled (in shares)			(14,850)	(10,395)
Ending balance (in shares)			55,536	68,902
Weighted Average Stock Option Exercise Price
Beginning balance (in dollars per share)			$ 2.67
Options Granted (in dollars per share)			7.00	$ 2.65
Options Cancelled (in dollars per share)			2.53	2.53
Options Exercised (in dollars per share)			2.53
Ending balance (in dollars per share)			$ 3.74	$ 2.67
2013 Plan | Stock options
Stock Incentive Plans
Number of shares reserved for issuance					300,000	847,533
Shares Available for Grant
Shares Authorized (in shares)					300,000	847,533
Stock Options Outstanding
Options Granted (in shares)					0
2014 Plan
Stock Incentive Plans
Number of shares reserved for issuance			333,333
Shares Available for Grant
Shares Authorized (in shares)			333,333
Ending balance (in shares)			106,833
Stock Options Outstanding
Options Granted (in shares)			241,500
Options Cancelled (in shares)			(15,000)
Ending balance (in shares)			919,506
RSUs Outstanding
Ending balance (in shares)			55,536
Weighted Average Stock Option Exercise Price
Options Granted (in dollars per share)			$ 4.32
Options Cancelled (in dollars per share)			5.09
Ending balance (in dollars per share)			$ 3.87
2014 Plan | Stock options
Stock Incentive Plans
Number of shares reserved for issuance	333,333
Increase in share reserve based on outstanding number of shares (as a percent)	2.00%
Additional shares under plan contingent upon approval by stockholders at next stockholders meeting		550,000
Shares Available for Grant
Shares Authorized (in shares)	333,333