XML 63 R52.htm IDEA: XBRL DOCUMENT v3.24.1.1.u2
Note 7 - Stock Plans - Summary of SSARs (Details) - Stock Settled Stock Appreciation Rights SSARs [Member] - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Outstanding, awards (in shares) 64,326    
Outstanding, weighted average grant date fair value (in dollars per share) $ 11.59    
Outstanding, weighted average remaining contractual term (Year) 3 years 7 months 6 days   3 years 9 months 18 days
Granted, awards (in shares) 0    
Granted, weighted average grant date fair value (in dollars per share)    
Exercised, awards (in shares) 0 0  
Exercised, weighted average grant date fair value (in dollars per share)    
Forfeited, awards (in shares) 0    
Forfeited, weighted average grant date fair value (in dollars per share)    
Outstanding, awards (in shares) 64,326   64,326
Outstanding, weighted average grant date fair value (in dollars per share) $ 11.59   $ 11.59