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Accrued Liabilities (Tables)
 3 Months Ended
Mar. 31, 2022
Payables and Accruals [Abstract]  
Schedule of Accrued Liabilities
Accrued liabilities as of March 31, 2022 and December 31, 2021 consisted of the following (table in thousands):
March 31,
2022		December 31,
2021
Accrued Research & Development Expense$338 $366 
Accrued Compensation and Benefits1,158 1,791 
Accrued Unvouchered Receipts537 796 
Accrued Workers Compensation458 382 
Other Accrued Liabilities1,882 1,755 
Total Accrued Liabilities$4,373 $5,090