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Debt - Expected Principal, Interest and Fee Payments on Term Loan Credit Agreement (Detail) - Term Loan Credit Agreement
$ in Thousands
Sep. 30, 2019
USD ($)
Debt Instrument [Line Items]  
2022, Principal $ 15,000
2023, Principal 20,000
2024, Principal 5,000
Total, Principal 40,000
2019, Interest and Fees 786
2020, Interest and Fees 3,153
2021, Interest and Fees 3,145
2022, Interest and Fees 2,750
2023, Interest and Fees 1,244
2024, Interest and Fees 1,266
Total, Interest and Fees 12,344
2019, Total 786
2020, Total 3,153
2021, Total 3,145
2022, Total 17,750
2023, Total 21,244
2024, Total 6,266
Total $ 52,344