Consolidated Statement of Changes in Stockholders Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Balance, beginning amount at Dec. 31, 2013	$ 27,023	$ 2	$ 21,546	$ 5,475
Balance, beginning shares at Dec. 31, 2013		22,368,453
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation expense	1,448		1,448
Proceeds from Exercise of stock options	132		132
Proceeds from Exercise of stock options, shares		79,645
Net loss	(10,479)			(10,479)
Balance, ending amount at Dec. 31, 2014	$ 18,124	$ 2	23,126	(5,004)
Balance, ending shares at Dec. 31, 2014	22,448,098	22,448,098
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation expense	$ 766		766
Proceeds from Exercise of stock options	54		54
Proceeds from Exercise of stock options, shares		192,513
Net loss	(12,602)			(12,602)
Balance, ending amount at Dec. 31, 2015	$ 6,342	$ 2	$ 23,946	$ (17,606)
Balance, ending shares at Dec. 31, 2015	22,640,611	22,640,611