Borrowings - Schedule of Maturities of Our Borrowings (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
2020	$ 5,262
2021	4,444
2022	13,333
2023	13,333
2024	83,940
Total principal payments	120,312
Unamortized discount	(450)
Debt issuance costs	(846)
Total debt — net carrying amount	$ 119,016	$ 118,899

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