XML 66 R55.htm IDEA: XBRL DOCUMENT v3.21.2
Note 11 - Share-based Compensation - Summary of Stock Option Valuation Assumptions (Details) - $ / shares
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Expected stock price volatility 50.00% 46.00%
Risk-free interest rate 0.90% 0.38%
Forfeiture rate 0.00% 0.00%
Expected dividend yield 0.00% 0.00%
Expected life of options (Year) 5 years 8 months 26 days 6 years 1 month 24 days
Weighted-average fair value of options granted (in dollars per share) $ 2.57 $ 3.43