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Other Liabilities (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other liabilities, current      
Accrued compensation, benefits, continuation obligation, and bonus $ 471 $ 436 $ 2,349
Accrued compensation for phantom shares - Note 15 2,106 1,560 1,590
Total 4,980 4,157 3,939
Other liabilities, non-current      
Compensation and benefits continuation obligation 904 1,145 0
Payroll tax liability 471 505 0
Total $ 1,375 $ 1,650 $ 0
Minimum      
Other liabilities, non-current      
Agreement period for postemployement benefits 12 months 12 months  
Maximum      
Other liabilities, non-current      
Agreement period for postemployement benefits 24 months 24 months