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Long-Term Debt, Net, and Other Borrowings - Maturities of Principal Obligations (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
Remainder of 2019 $ 2,500  
2020 10,000  
2021 10,000  
2022 11,250  
2023 15,000  
2024 148,750  
Total principal outstanding 197,500  
Unamortized debt discount (512)  
Unamortized debt issuance costs (816)  
Finance lease liabilities 367  
Total 196,539  
Less: current portion (10,166) $ (2,750)
Total long-term debt, net and other borrowings $ 186,373 $ 263,709