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Other long-term liabilities
 12 Months Ended
Dec. 31, 2021
Other Liabilities Disclosure [Abstract]  
Other long-term liabilities Other long-term liabilities
December 31,
 20212020
Leasehold improvements financing and other$12 $40 
Unrecognized tax benefits (Note 13(e))154 297 
 $166 $337