XML 106 R93.htm IDEA: XBRL DOCUMENT v3.22.4
Stock Plans - ESPP FV Assumptions (Details) - ESPP - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Share-based compensation      
Cash proceeds $ 3.7 $ 3.4 $ 2.9
Number of shares issued 208,140 196,024 254,703
Assumptions      
Weighted average fair value (in dollars per share) $ 6.00 $ 5.90 $ 4.81
Dividend yield (as a percent) 0.00% 0.00% 0.00%
Expected volatility factor (as a percent) 43.00% 52.00% 70.00%
Risk-free interest rate (as a percent) 1.73% 0.07% 0.95%
Expected life (in years) 6 months 6 months 6 months