XML 68 R57.htm IDEA: XBRL DOCUMENT v3.21.2
Note 11 - Equity Plans - Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Outstanding, number of shares (in shares) 610,540 636,086 636,086
Outstanding, weighted average estimated fair value (in dollars per share) $ 18.25 $ 19.25 $ 19.25
Granted, number of shares (in shares) 20,604 70,588 0
Granted, weighted average estimated fair value (in dollars per share) $ 23.29 $ 11.92  
Converted into shares, number of shares (in shares) (2,422) (94,161)  
Converted into shares, weighted average estimated fair value (in dollars per share) $ 17.09 $ 20.27  
Forfeited, number of shares (in shares) (5,086) (1,973)  
Forfeited, weighted average estimated fair value (in dollars per share) $ 17.55 $ 18.14  
Outstanding, number of shares (in shares) 623,636 610,540 610,540
Outstanding, weighted average estimated fair value (in dollars per share) $ 18.43 $ 18.25 $ 18.25
Vested, number of shares (in shares) 414,090 375,692  
Vested, weighted average estimated fair value (in dollars per share) $ 18.76 $ 18.88