Earnings Per Share - Diluted Earnings (Loss) per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Diluted earnings (loss) per share
Net income	$ 5,893	$ 5,482
Net income attributable to noncontrolling interest	(10)
Net income applicable to basic earnings per common share	$ 5,883	$ 5,482
Weighted average shares outstanding	10,924,902	9,691,459
Basic earnings per share	$ 0.538	$ 0.566
Effect of dilutive securities:
Assumed proceeds on exercise	$ 50	$ 31
Diluted weighted average shares and common stock equivalents	10,946,000	9,707,000
Diluted earnings per share	$ 0.537	$ 0.565
Restricted stock plan
Effect of dilutive securities:
Weighted average shares outstanding under options/ restricted stock plans	9,000	10,000
Delmar 2004 Stock Option Plan | Stock options
Effect of dilutive securities:
Weighted average shares outstanding under options/ restricted stock plans	7,000	27,000
Weighted average exercise price per share	$ 9.05	$ 9.05
Assumed proceeds on exercise	$ 63	$ 244
Average market value per share	$ 7.46	$ 7.47
Liberty 2004 Stock Option Plan | Stock options
Effect of dilutive securities:
Weighted average shares outstanding under options/ restricted stock plans	12,000	12,000
Weighted average exercise price per share	$ 3.98	$ 3.98
Assumed proceeds on exercise	$ 48	$ 48
Average market value per share	$ 7.46	$ 7.47
Less: Treasury stock purchased with assumed proceeds from exercise	6,000	6,000
Partners 2015 Stock Option Plan | Stock options
Effect of dilutive securities:
Weighted average shares outstanding under options/ restricted stock plans	32,000
Weighted average exercise price per share	$ 6.14
Assumed proceeds on exercise	$ 196
Average market value per share	$ 7.00
Less: Treasury stock purchased with assumed proceeds from exercise	26,000