CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Balance at beginning of period at Dec. 31, 2016	$ 2	$ 91,027	$ (34,923)	$ 56,106
Balance at beginning of period (in shares) at Dec. 31, 2016	16,628,476
Increase (Decrease) in Stockholders' Equity
Issuance of restricted stock (in shares)	5,212
Shares surrendered by stockholder	(246)
Net exercise of stock options		(1,970)		(1,970)
Net exercise of stock options (in shares)	446,835
Exercise of stock options		50		50
Exercise of stock options (in shares)	16,803
Stock based compensation expense		3,821		3,821
Net (loss) income			(2,881)	(2,881)
Balance at end of period at Mar. 31, 2017	$ 2	$ 92,928	$ (37,804)	$ 55,126
Balance at end of period (in shares) at Mar. 31, 2017	17,097,080