Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Summary of Significant Accounting Policies - Noncash Stock-based Compensation Expense (Details)

v3.23.2
Note 2 - Summary of Significant Accounting Policies - Noncash Stock-based Compensation Expense (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Share-Based Payment Arrangement, Expense $ 749,000 $ 1,000,000 $ 1,532,000 $ 2,099,000
Selling and Marketing Expense [Member]        
Share-Based Payment Arrangement, Expense 236,000 251,000 400,000 481,000
Research and Development Expense [Member]        
Share-Based Payment Arrangement, Expense 102,000 74,000 191,000 263,000
General and Administrative Expense [Member]        
Share-Based Payment Arrangement, Expense $ 411,000 $ 675,000 $ 941,000 $ 1,355,000