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OTHER NON-CURRENT LIABILITIES
 12 Months Ended
Dec. 31, 2020
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)20202019
Operating lease liabilities$12,281 $19,707 
Income tax liabilities12,414 10,935 
Deferred revenue504 88 
Other non-current liabilities40 286 
Total$25,239 $31,016