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Other non-current Assets (Tables)
 9 Months Ended
Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Other Non-current Assets The following table provides the components of other non-current assets:
 September 30,
2021		December 31,
2020
Royalty receivable6,000 7,000 
Other 905 836 
Total other non-current assets$6,905 $7,836