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Accrued Liabilities
 12 Months Ended
Dec. 31, 2022
Payables and Accruals [Abstract]  
Accrued Liabilities Accrued Liabilities
Accrued liabilities as of December 31, 2022 and 2021 consisted of the following (table in thousands):
20222021
Accrued Research & Development Expense$43 $366 
Accrued Compensation and Benefits2,568 1,791 
Accrued Unvouchered Receipts585 796 
Accrued Workers Compensation306 382 
Other Accrued Liabilities4,200 1,755 
Total Accrued Liabilities$7,702 $5,090