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OTHER NON-CURRENT LIABILITIES
 12 Months Ended
Dec. 31, 2021
Other Liabilities Disclosure [Abstract]  
OTHER NON-CURRENT LIABILITIES OTHER NON-CURRENT LIABILITIES
Other non-current liabilities consist of the following as of December 31:
(in thousands)20212020
Operating lease liabilities$5,029 $12,281 
Income tax liabilities14,156 12,414 
Deferred revenue— 504 
Other non-current liabilities81 40 
Total$19,266 $25,239