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Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021 USD ($) Customer	Dec. 31, 2020 USD ($) Customer	Dec. 31, 2019 USD ($)
Revenue, Major Customer [Line Items]
Foreign currency gains (losses)	$ (336,000)	$ 181,000	$ (108,000)
Maturity period of cash and cash equivalents	less than three months
Available-for-sale securities, failed auction, value	$ 3,000,000
Number of customers accounted for trade account receivable | Customer	1	1
Cost of advertising	$ 2,994,000	$ 2,637,000	$ 2,749,000
Percentage likelihood of tax benefit settlement	50.00%
Accounting Standards Update 2014-09 [Member]
Revenue, Major Customer [Line Items]
Deferred revenue current	$ 4,087,000	$ 3,550,000
Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of trade account receivable	10.00%	24.10%
Maximum [Member]
Revenue, Major Customer [Line Items]
Estimated useful life of intangible assets	20 years
Customer Payments Period	60 days
Minimum [Member]
Revenue, Major Customer [Line Items]
Customer Payments Period	30 days

X

- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 35
-Section 50
-Paragraph 1
-Subparagraph (b)
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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount before tax of foreign currency transaction unrealized gain (loss) recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 50
-Paragraph 1
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-Name Accounting Standards Codification
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-Section 45
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Number of customers accounted for trade account receivable.

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