Summary Of Significant Accounting Policies (Earnings Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	May 28, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic
Net income		$ 4,076	$ 10,186	$ 13,986	$ 22,260
Earnings allocated to participating securities (Series C preferred stock)					(2,289)
Net income attributable to common stockholders		$ 4,076	$ 10,186	$ 13,986	$ 19,971
Weighted average common shares outstanding including unvested share-based payment awards		6,609,962	6,563,264	6,625,699	5,907,395
Less: Unvested share-based payment awards-2019 Plan		(99,458)	(47,875)	(97,573)	(42,202)
Average shares		6,510,504	6,515,389	6,528,126	5,865,193
Basic earnings per common share		$ 0.63	$ 1.56	$ 2.14	$ 3.41
Diluted
Net earnings allocated to common stockholders		$ 4,076	$ 10,186	$ 13,986	$ 19,971
Weighted average common shares outstanding for basic earnings per common share		6,510,504	6,515,389	6,528,126	5,865,193
Add: Dilutive effects of assumed exercises of stock options		47,288	33,732	46,615	28,305
Add: Dilutive effects of unvested share-based payment awards-2019 Plan		99,458	47,875	97,573	42,202
Average shares and dilutive potential common shares		6,657,250	6,596,996	6,672,314	5,935,700
Diluted earnings per common share		$ 0.61	$ 1.54	$ 2.10	$ 3.36
Series C Preferred Stock [Member]
Diluted
Shares issued upon conversion	12,607
Non-Voting Common Stock [Member]
Diluted
Shares issued upon conversion	1,260,700