ACQUISITIONS - Additional Information (Details) $ in Thousands			3 Months Ended
	Dec. 16, 2021 USD ($) shares	Jun. 08, 2021 USD ($) shares	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Mar. 31, 2021 USD ($) installment	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($) installment
Business Acquisition [Line Items]
Goodwill			$ 119,490	$ 119,490
Current portion of earnout liability			8,250	7,500
Non-current earnout liability			8,250	9,000
Payment of notes payable			2,426		$ 2,425
Selected, Inc
Business Acquisition [Line Items]
Cash consideration, gross	$ 3,500
Equity consideration for acquisition, value	$ 1,500
Equity consideration for acquisition (in shares) | shares	59,429
Earnout liabilities	$ 1,500
Goodwill	$ 6,500
Workforce Solutions Group, Inc.
Business Acquisition [Line Items]
Cash consideration, gross		$ 25,000
Equity consideration for acquisition, value		$ 5,000
Equity consideration for acquisition (in shares) | shares		307,730
Earnout liabilities		$ 15,000
Goodwill		$ 22,066
Net working capital adjustment				$ 1,100
Contingent consideration liability, term		3 years
Current portion of earnout liability			7,500
Non-current earnout liability			7,500
Other intangible assets		$ 14,200
Workforce Solutions Group, Inc. | Customer relationships
Business Acquisition [Line Items]
Other intangible assets		$ 14,200
Weighted average useful life		11 years 6 months
Mediscan | Earnout Notes Payable
Business Acquisition [Line Items]
Notes payable							$ 7,300
Number of installments | installment							3
Number of installments paid | installment					2
Payment of notes payable			$ 2,600		$ 2,400	$ 2,400