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Note 9 - Capital Stock and Stock-based Compensation - Black Scholes Assumptions (Details) - Black Scholes Option Pricing Model [Member] - Share-Based Payment Arrangement, Option [Member]
6 Months Ended
Jun. 30, 2023
Volatility 56.80%
Risk-free interest rate 4.60%
Correlation coefficient 41.70%
Dividend yield 0.00%