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Accrued Liabilities - Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Accrued Liabilities    
Accrued salaries and other compensation $ 632 $ 1,148
Sales and marketing programs and customer credit balances 640 605
Product warranty 194 194
Current portion of operating lease liabilities 383 641
Other accrued liabilities 441 453
Total $ 2,290 $ 3,041