Stock-based Compensation (Details 1) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning | shares	1,477,300
Granted | shares	161,500
Exercised | shares	(15,000)
Expired | shares	(20,000)
Outstanding at ending | shares	1,603,800
Exercisable at ending | shares	1,055,581
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning | $ / shares	$ 1.61
Granted | $ / shares	8.04
Exercised | $ / shares	0.50
Expired | $ / shares	15.00
Outstanding at ending | $ / shares	2.00
Exercisable at ending | $ / shares	$ 2.18
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Life [Roll Forward]
Outstanding at beginning	5 years 9 months 18 days
Granted	5 years
Outstanding at ending	5 years 3 months 18 days
Exercisable at ending	5 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Roll Forward]
Outstanding at beginning | $	$ 9,662	[1]
Outstanding at ending | $	5,934	[1]
Exercisable at ending | $	$ 3,716	[1]

[1] The aggregate intrinsic value on the table was calculated based on the difference between the estimated fair value of the Company's stock and the exercise price of the underlying option. The estimated stock values used in the calculation was $5.70 and $8.15 per share at June 30, 2017 and December 31, 2016, respectively.