Summary Of Significant Accounting Policies (Earnings Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	May 28, 2020	Mar. 31, 2021	Mar. 31, 2020
Basic
Net income		$ 6,421	$ 2,006
Earnings allocated to participating securities (Series C preferred stock)			(377)
Net income attributable to common stockholders		$ 6,421	$ 1,629
Weighted average common shares outstanding including unvested share-based payment awards		6,623,970	5,373,897
Less: Unvested share-based payment awards-2019 Plan		(86,219)	(39,950)
Average shares		6,537,751	5,333,947
Basic earnings per common share		$ 0.98	$ 0.31
Diluted
Net earnings allocated to common stockholders		$ 6,421	$ 1,629
Weighted average common shares outstanding for basic earnings per common share		6,537,751	5,333,947
Add: Dilutive effects of assumed exercises of stock options		46,621	26,421
Add: Dilutive effects of unvested share-based payment awards-2019 Plan		86,219	39,950
Average shares and dilutive potential common shares		6,670,591	5,400,318
Diluted earnings per common share		$ 0.96	$ 0.30
Series C Preferred Stock [Member]
Basic
Net income
Diluted
Shares issued upon conversion	12,607
Non-Voting Common Stock [Member]
Basic
Net income
Diluted
Shares issued upon conversion	1,260,700