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Accrued Liabilities (Tables)
 6 Months Ended
Jun. 30, 2021
Payables and Accruals [Abstract]  
Schedule of Accrued Liabilities
Accrued liabilities as of June 30, 2021 and December 31, 2020 consisted of the following (table in thousands):
June 30,
2021		December 31,
2020
Accrued Research & Development Expense$315 $232 
Accrued Compensation and Benefits1,420 2,500 
Accrued Unvouchered Receipts647 755 
Accrued Workers Compensation531 395 
Other Accrued Liabilities1,080 1,131 
Total Accrued Liabilities$3,993 $5,013