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Basis of Presentation of Interim Period Statements - Additional Information (Detail)
$ in Thousands
 3 Months Ended
Dec. 31, 2023
USD ($)
Mar. 31, 2024
USD ($)
Company
shares
Mar. 31, 2023
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Revenue recognition professional employer service contracts term   1 year  
Professional employer service contract cancellation and termination period   30 days  
Payment term for staffing customers   30 days  
Number of wholly-owned insurance companies | Company   2  
Cash and cash equivalents, maturity term   3 months  
Allowance for doubtful accounts $ 900 $ 900  
Income taxes paid   40 $ 10
Prior period reclassification adjustment $ 1,300 $ 1,400 $ 300
Potential common shares excluded from calculation of diluted loss per share | shares   135,405