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Stockholders' Equity - Additional Information (Detail) - USD ($)		9 Months Ended
	Jun. 01, 2020	Sep. 30, 2021	Sep. 30, 2020	Aug. 05, 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost		$ 5,155,000	$ 5,913,000
Proceeds from exercise of stock options		247,000	2,115,000
Amount share repurchase program of common shares				$ 25,000,000
Public Offering [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock in connection with public offering, net of commissions and expenses of $6,200, Shares	8,000,000
Public offering price per share	$ 11.00
Net offering proceeds after deducting underwriting discount and commission and offering expenses	$ 95,000,000
Over-Allotment Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Underwriters option exercisable period	30 days
Underwriters option to purchase additional shares	1,200,000
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost		793,000	683,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost		$ 2,891,000	3,329,000
Performance Based Restricted Stock [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		1 year
Performance Based Restricted Stock [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Performance Based Restricted Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost		$ 1,471,000	$ 1,901,000
Share Repurchase Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares purchased and retired		0	0

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