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Summary of Significant Accounting Policies - Summary of Stock-Based Compensation Expense Recorded in Expense Categories (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total allocated share-based compensation expense | $ 14,543 | $ 10,070 | $ 10,877
Cost of Services and Fulfillment [Member] |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total allocated share-based compensation expense | 8,435 | 6,057 | 6,156
Selling and Marketing [Member] |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total allocated share-based compensation expense | 2,774 | 1,698 | 1,751
General and Administrative [Member] |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |
Total allocated share-based compensation expense | $ 3,334 | $ 2,315 | $ 2,970

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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