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Supplemental Financial Statement Information - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Balance Sheet Related Disclosures [Abstract]    
Prepaid maintenance contracts $ 6,583 $ 7,715
Prepaid expenses 4,095 6,628
Prepaid insurance 1,031 1,672
Others 616 646
Prepaid expenses and other current assets $ 12,325 $ 16,661