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Note 6 - Stock-Based Compensation - Black-scholes Option Pricing Model (Details)
Jun. 10, 2020
$ / shares
Expected volatility 32.80%
Expected dividends 0.00%
Risk-free interest rate 0.30%
Exercise price (in dollars per share) $ 43.95
Expected term (in years) (Year) 6 years 1 month 6 days
Weighted-average grant date fair value (in dollars per share) $ 14.10