Stock-Based Compensation (Details) - Current Stock Option [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Outstanding, December 31, 2016		160
Number of Shares, Granted		121
Number of Shares, Exercised		(3)
Number of Shares, Forfeited		0
Number of Shares, Outstanding, September 30, 2017		278	160
Exercisable, September 30, 2017		56
Weighted Average Exercise Price per Share, Outstanding, December 31, 2016		$ 12.76
Weighted Average Exercise Price per Share, Granted		18.87
Weighted Average Exercise Price per Share, Exercised		13.82
Weighted Average Exercise Price per Share, Outstanding, September 30, 2017		15.4	$ 12.76
Weighted Average Exercise Price per Share, Exercisable, September 30, 2017		$ 12.61
Weighted Average Remaining Contractual Life, Outstanding			9 years 2 months 12 days
Weighted Average Remaining Contractual Life, Outstanding		8 years 10 months 24 days
Weighted Average Remaining Contractual Life, Exercisable		8 years 10 months 24 days
Aggregate Intrinsic Value, Outstanding, December 31, 2016	[1]	$ 1,907
Aggregate Intrinsic Value, Outstanding, September 30, 2017	[1]	875	$ 1,907
Aggregate Intrinsic Value, Exercisable, September 30, 2017	[1]	$ 320

[1] The aggregate intrinsic value on this table was calculated based on the amount, if any, by which the closing market value of the Company’s stock on September 30, 2017 ($18.30) exceeded the exercise price of the underlying options, multiplied by the number of shares subject to each option.