Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Restricted Cash, Noncurrent	$ 646	$ 782
Preferred Stock, Par or Stated Value Per Share	$ 1	$ 1
Preferred Stock, Shares Authorized	977,000	977,000
Preferred Stock, Shares Issued	0	0
Class A Common Stock [Member]
Common Stock, Par or Stated Value Per Share	$ 1	$ 1
Common Stock, Shares Authorized	7,000,000	7,000,000
Common Stock, Shares, Issued	964,001	964,001
Common Stock, Shares, Outstanding	964,001	964,001
Class B Common Stock [Member]
Common Stock, Par or Stated Value Per Share	$ 1	$ 1
Common Stock, Shares Authorized	40,000,000	40,000,000
Common Stock, Shares, Issued	19,035,999	19,035,999
Common Stock, Shares, Outstanding	3,822,601	3,942,065
Treasury Stock, Shares	15,213,398	15,093,934