Stock Compensation Plans, Information on Stock Options (Details) - Stock Options [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stock options, additional disclosures [Abstract]
Options exercised, number of shares (in shares)	14,216
Options exercised, weighted average exercise price (in dollars per share)	$ 6.71
Options exercised, aggregate intrinsic value	$ 81	$ 0	$ 37
Options exercised, weighted average remaining contractual term	0 years
Stock options outstanding and expected to vest, number of shares (in shares)	329,184
Stock options outstanding and expected to vest, weighted average exercise price (in dollars per share)	$ 8.23
Stock options outstanding and expected to vest, aggregate intrinsic value	$ 915
Stock options outstanding and expected to vest, weighted average remaining contractual term	6 years 9 months 4 days
Stock options vested and currently exercisable, number of shares) (in shares)	162,233
Stock options vested and currently exercisable, weighted average exercise price (in dollars per share)	$ 6.02
Stock options vested and currently exercisable, aggregate intrinsic value	$ 744
Exercisable (vested), weighted average remaining contractual term	5 years 3 months 4 days
Weighted average fair value per share of options granted (in dollars per share)	$ 2.36	$ 2.55	$ 1.88
Fair value of awards vested	$ 114	$ 85	$ 67
Exercise price range, lower range limit (in dollars per share)	$ 3.27
Exercise price range, upper range limit (in dollars per share)	$ 12.41
Unrecognized compensation related to non-vested stock options	$ 261
Unrecognized compensation cost, period for recognition	2 years 4 months 24 days
Recognized compensation cost	$ 140	$ 111	$ 85