Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Net income (loss)	$ 459	$ (446)	$ (2,320)	$ (2,573)
Deemed capital contribution on extinguishment of preferred stock				31,480
Net income (loss) available to common stockholders	$ 459	$ (446)	$ (2,320)	$ 28,907
Denominator:
Weighted average number of common shares outstanding,	5,998,920	4,163,245	5,304,201	3,312,969
Earnings per basic share:
Net income (loss)	$ 0.08	$ (0.11)	$ (0.44)	$ (0.78)
Deemed capital contribution on extinguishment of preferred stock				9.50
Net income (loss) available to common stockholders	$ 0.08	$ (0.11)	$ (0.44)	$ 8.72
Numerator:
Net income (loss)	$ 459	$ (446)	$ (2,320)	$ (2,573)
Deemed capital contribution on extinguishment of preferred stock				31,480
Net income (loss) available to common stockholders	$ 459	$ (446)	$ (2,320)	$ 28,907
Denominator:
Weighted average basic shares outstanding,	5,998,920	4,163,245	5,304,201	3,312,969
Weighted average effect of dilutive securities
Employee stock options	7,196			260
Convertible preferred stock	2,926			173,418
Restricted stock units				17,088
Weighted average diluted shares outstanding	6,009,042	4,163,245	5,304,201	3,503,735
Earnings per diluted share:
Net Loss	$ 0.08	$ (0.11)	$ (0.44)	$ (0.73)
Deemed capital contribution on extinguishment of preferred stock				8.98
Net income (loss) available to common stockholders	$ 0.08	$ (0.11)	$ (0.44)	$ 8.25