Quarterly report pursuant to Section 13 or 15(d)

Borrowing Arrangements - Schedule of Required Future Principal Payments (Detail)

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Borrowing Arrangements - Schedule of Required Future Principal Payments (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Total Long-Term Debt, net $ 15,000 $ 14,900
K2 Loan and Security Agreement    
Debt Instrument [Line Items]    
2021 (remaining) 0  
2022 4,105  
2023 7,537  
2024 3,358  
Total Principal Amounts 15,000 $ 15,000
Final Fee Due at Maturity 884  
Unamortized discount, deferred costs and final fee (853)  
Total Long-Term Debt, net $ 15,031