Stockholders' Equity (Details) (USD $)	0 Months Ended
	May 29, 2014
Convertible Promissory Notes, April 2014
Stockholders' equity
Aggregate principal amount converted	$ 3,000,000
Convertible Promissory Notes, April 2014 | Common stock
Stockholders' equity
Number of common shares into which convertible subordinated promissory notes were converted (in shares)	503,450
Redeemable Convertible Preferred Stock | Common stock
Stockholders' equity
Number of common shares into which convertible preferred stock was converted	8,809,325
Initial public offering
Stockholders' equity
Proceeds from offering, net of underwriting discounts and commissions and other offering costs	$ 49,700,000
Initial public offering | Common stock
Stockholders' equity
Common stock issued (in shares)	9,166,667
Share price (in dollars per share)	$ 6.00