FAIR VALUE MEASUREMENTS - Carrying Amounts and Estimated Fair Values of Significant Financial Instrument that were not Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Dec. 16, 2021	Jun. 08, 2021
Workforce Solutions Group, Inc.
Fair Value, Option, Quantitative Disclosures [Line Items]
Earnout liabilities				$ 15,000
Selected, Inc
Fair Value, Option, Quantitative Disclosures [Line Items]
Earnout liabilities			$ 1,500
Level 2 | Carrying Amount | Workforce Solutions Group, Inc.
Fair Value, Option, Quantitative Disclosures [Line Items]
Earnout liabilities	$ 15,000	$ 15,000
Level 2 | Carrying Amount | Selected, Inc
Fair Value, Option, Quantitative Disclosures [Line Items]
Earnout liabilities	1,500	1,500
Level 2 | Fair Value | Workforce Solutions Group, Inc.
Fair Value, Option, Quantitative Disclosures [Line Items]
Earnout liabilities	15,000	15,000
Level 2 | Fair Value | Selected, Inc
Fair Value, Option, Quantitative Disclosures [Line Items]
Earnout liabilities	1,500	1,500
Level 2 | Senior Secured Asset-Based Loan | Carrying Amount
Fair Value, Option, Quantitative Disclosures [Line Items]
Senior Secured Asset-Based Loan	51,501	9,200
Level 2 | Senior Secured Asset-Based Loan | Fair Value
Fair Value, Option, Quantitative Disclosures [Line Items]
Senior Secured Asset-Based Loan	51,501	9,200
Level 2 | Earnout Notes Payable | Carrying Amount
Fair Value, Option, Quantitative Disclosures [Line Items]
Note payable, fair value	0	2,426
Level 2 | Earnout Notes Payable | Fair Value
Fair Value, Option, Quantitative Disclosures [Line Items]
Note payable, fair value	0	2,426
Level 2 | Term Loan | Carrying Amount
Fair Value, Option, Quantitative Disclosures [Line Items]
Note payable, fair value	173,875	174,312
Level 2 | Term Loan | Fair Value
Fair Value, Option, Quantitative Disclosures [Line Items]
Note payable, fair value	$ 174,387	$ 174,845