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Revenues - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Dec. 31, 2020
Revenue from contract with customer [Line Items]
Deferred revenue	$ 3,488		$ 3,488	$ 4,811
Long-term Contract [Member]
Revenue from contract with customer [Line Items]
Deferred revenue	1,148		1,148	1,595
Up Front Payment Arrangement [Member]
Revenue from contract with customer [Line Items]
Deferred revenue	$ 2,340		$ 2,340	$ 3,216
Customer One [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Revenue from contract with customer [Line Items]
Percentage of concentration risk			13.00%
Customer One [Member] | Net Consolidated Revenue [Member] | Customer Concentration Risk [Member]
Revenue from contract with customer [Line Items]
Percentage of concentration risk	14.00%	11.00%
Customer Two [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Revenue from contract with customer [Line Items]
Percentage of concentration risk				11.00%
Customer Two [Member] | Net Consolidated Revenue [Member] | Customer Concentration Risk [Member]
Revenue from contract with customer [Line Items]
Percentage of concentration risk			10.00%

X

- Definition

Revenue from contract with customer.

+ References

No definition available.

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- Definition

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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