Organization, Business and Summary of Significant Accounting Policies - Additional Information (Detail)		3 Months Ended		9 Months Ended
	Oct. 01, 2021 ReportingUnit	Sep. 30, 2023 USD ($) Datacenter Customer Country Lab Location $ / shares	Sep. 30, 2022 USD ($) Customer	Sep. 30, 2023 USD ($) Datacenter Customer Country Lab Location Segment $ / shares	Sep. 30, 2022 USD ($) Customer	Mar. 03, 2023 USD ($)	Dec. 31, 2022 USD ($) $ / shares	Dec. 19, 2019 USD ($)
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Number of countries | Country		16		16
Number of data centers | Datacenter		9		9
Number of data recovery labs | Lab		13		13
Date of incorporation				Aug. 02, 2018
Common stock, par value | $ / shares		$ 0.0001		$ 0.0001			$ 0.0001
Cash balance		$ 25,400,000		$ 25,400,000
Debt amount, balance due		544,837,000		544,837,000			$ 539,558,000
Current portion of long-term debt		289,715,000		$ 289,715,000			3,000,000
Number of business segment | Segment				1
Revenues		79,336,000	$ 74,544,000	$ 260,002,000	$ 231,633,000
Depreciation expense		2,500,000	2,400,000	7,200,000	7,300,000
Amortization expense		4,000,000	5,100,000	11,900,000	15,100,000
Number of reporting unit | ReportingUnit	1
Amended 2021 Credit Agreement [Member]
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Debt principal amount						$ 300,000,000
Delayed draw term loans		0		0		50,000,000
Debt amount, balance due		292,500,000		292,500,000
Current portion of long-term debt		292,500,000		292,500,000
Amended 2021 Credit Agreement [Member] | Revolving Credit Facility [Member]
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Line Of Credit		0		0		40,000,000
Amended 2021 Credit Agreement [Member] | Letter of Credit [Member]
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Line Of Credit		600,000		600,000		$ 10,000,000
Convertible Debentures Due 2024 [Member]
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Debt principal amount								$ 200,000,000
Debt amount, balance due		252,337,000		252,337,000			244,808,000
Cost of Revenues [Member]
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Amortization expense		1,500,000	2,500,000	4,200,000	7,600,000
Internal-Use Software Development [Member]
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Capitalized software costs		19,500,000		19,500,000			17,500,000
UK and Germany [Member]
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Revenues		11,500,000	$ 10,500,000	40,600,000	$ 36,700,000
Long-lived assets		$ 25,800,000		$ 25,800,000			$ 25,900,000
Consolidated Revenues [Member] | Customer Concentration Risk [Member]
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Number of customers representing more than 5% of consolidated revenues or accounts receivable | Customer		0	0	0	0
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Number of customers representing more than 5% of consolidated revenues or accounts receivable | Customer		0	0	0	0
Minimum [Member]
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Number of locations | Location		25		25
Minimum [Member] | Internal-Use Software Development [Member]
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		3 years		3 years
Maximum [Member] | Internal-Use Software Development [Member]
Organization Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		5 years		5 years