Annual report pursuant to Section 13 and 15(d)

Note 12 - Stock-based Compensation - Vesting Terms of Options Granted (Details)

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Note 12 - Stock-based Compensation - Vesting Terms of Options Granted (Details) - shares
shares in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Stock options granted in the period (in shares) 4,659 6,362 6,362
Options with Cliff Vesting After One Year Anniversary [Member]      
Stock options granted in the period (in shares) 0 300  
Options with Three Year Vesting [Member]      
Stock options granted in the period (in shares) 430 862  
Options with Four Year Vesting [Member]      
Stock options granted in the period (in shares) 3,429 5,200  
Options With Performance Criteria [Member]      
Stock options granted in the period (in shares) 800 0