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Note 6 - Property and Equipment - Depreciation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Selling, general and administrative expenses $ 457 $ 427
Total depreciation 1,073 943
Product [Member]    
Cost of sales 468 362
Service [Member]    
Cost of sales $ 148 $ 154