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Significant Accounting Policies - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) reporting_unit agency	Mar. 31, 2021 USD ($) agency
Summary Of Significant Accounting Policies [Line Items]
Number of government agencies | agency	3	3
Capitalized contract cost, amortization period (in years)	5 years
Commission expense | $	$ 8.2	$ 6.8
Number of reporting units | reporting_unit	1
Two months
Summary Of Significant Accounting Policies [Line Items]
Percentage of restricted cash balance	0.25
Lapse duration	2 months
Two years
Summary Of Significant Accounting Policies [Line Items]
Percentage of restricted cash balance	0.75
Sales Revenue, Net | Customer Concentration Risk | Foreign Customers
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage	33.50%	32.20%
Sales Revenue, Net | Customer Concentration Risk | Government Agencies
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage	18.10%	20.90%
Sales Revenue, Net | Customer Concentration Risk | Federal Government Agencies
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage	4.60%	6.90%

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Summary of significant accounting policies.

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Amortization period of cost capitalized in obtaining or fulfilling contract with customer, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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-Publisher FASB
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Amount of fees incurred for commissions on mutual funds and insurance products.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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