Stockholders’ Equity - Capital Structure (Details) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Nov. 30, 2015 USD ($) $ / shares shares	Mar. 31, 2016 Vote / shares $ / shares shares	Dec. 31, 2015 $ / shares shares	Nov. 24, 2015 $ / shares shares	Apr. 30, 2015 shares
Subsidiary, Sale of Stock [Line Items]
Gross proceeds from initial public offering | $	$ 51.0
Proceeds from initial public offering, net | $	$ 45.5
Shares issued in conversion of outstanding convertible notes	2,374,606
Common Stock, Shares Authorized		150,000,000	150,000,000	150,000,000	22,033,500
Preferred Stock, Shares Authorized		10,000,000	10,000,000	10,000,000
Preferred Stock, Par or Stated Value Per Share | $ / shares		$ 0.0001	$ 0.0001	$ 0.0001
Common stock, voting right per share | Vote / shares		1
IPO
Subsidiary, Sale of Stock [Line Items]
Shares issued	5,666,667
Share Price | $ / shares	$ 9.00