Debt - Expected Principal, Interest and Fee Payments on Term Loan Credit Agreement (Detail) - Term Loan Credit Agreement $ in Thousands	Jun. 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	1,648
2020, Interest and Fees	3,294
2021, Interest and Fees	3,285
2022, Interest and Fees	2,873
2023, Interest and Fees	1,300
2024, Interest and Fees	1,269
Total, Interest and Fees	13,669
2019, Total	1,648
2020, Total	3,294
2021, Total	3,285
2022, Total	17,873
2023, Total	21,300
2024, Total	6,269
Total	$ 53,669