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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Marketing expenses $ 1,514 $ 1,122
Professional services 1,480 1,241
Payroll costs 1,250 919
Tax payables 729 651
Warrant exercise deposit liability 0 664
Other accrued liabilities 850 387
Total accrued liabilities $ 5,823 $ 4,984