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Financial Statement Details - Accrued Expenses and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Royalties $ 2,437 $ 1,415
Payroll and related expenses 4,720 2,716
Professional fees 381 483
Accrued interest 800 1,543
Deferred revenue 2,536 2,235
Operating lease liabilities 1,121 1,101
Acquisition-related liabilities 1,000 1,000
Other 5,574 7,368
Total accrued expenses and other current liabilities $ 18,569 $ 17,861