Amount of noncash expense for share-based payment arrangement.

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Number of additional shares authorized for issuance under share-based payment arrangement.

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Percentage of vesting of award under share-based payment arrangement.

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Stock option issuance period.

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Vesting cap if TSR is negative.

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Stock-Based Awards - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 20, 2016	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share-based Payment Award
Stock option issuance period				10 years
Option vested period				1 year
Shares of common stock authorized to issue under equity award plan	10,000,000
Stock-based compensation expense		$ 2,121	$ 2,920	$ 5,264	$ 6,159
Below 25th Percentile [Member]
Share-based Payment Award
Shares granted and outstanding, Vesting percentage				0.00%
At 25th Percentile [Member]
Share-based Payment Award
Shares granted and outstanding, Vesting percentage				50.00%
At 50th Percentile [Member]
Share-based Payment Award
Shares granted and outstanding, Vesting percentage				100.00%
At 100th Percentile for grants made in 2019 and 2020 [Member]
Share-based Payment Award
Shares granted and outstanding, Vesting percentage				200.00%
At 85th Percentile for grants made in 2021 [Member]
Share-based Payment Award
Shares granted and outstanding, Vesting percentage				200.00%
Vesting Capped if TSR is Negative [Member]
Share-based Payment Award
Vesting cap if TSR is negative				100.00%
Performance Based Restricted Stock Unit [Member] \| Maximum [Member]
Share-based Payment Award
Shares granted and outstanding, Vesting percentage				200.00%
Performance Based Restricted Stock Unit [Member] \| Minimum [Member]
Share-based Payment Award
Shares granted and outstanding, Vesting percentage				0.00%