FAIR VALUE - Schedule of Fair Value Hierarchy for Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Liabilities:
Short-term contingent consideration	$ 14,500	$ 6,776
Long-term contingent consideration	23,159	31,776
Recurring
Assets:
Total		77
Liabilities:
Short-term contingent consideration	14,500	6,776
Long-term contingent consideration	23,159
Contingent consideration liability		31,776
Total	37,659	38,552
Recurring | Level 1
Assets:
Total		77
Liabilities:
Short-term contingent consideration	0	0
Long-term contingent consideration	0
Contingent consideration liability		0
Total	0	0
Recurring | Level 2
Assets:
Total		0
Liabilities:
Short-term contingent consideration	0	0
Long-term contingent consideration	0
Contingent consideration liability		0
Total	0	0
Recurring | Level 3
Assets:
Total		0
Liabilities:
Short-term contingent consideration	14,500	6,776
Long-term contingent consideration	23,159
Contingent consideration liability		31,776
Total	$ 37,659	38,552
Recurring | Money market funds
Assets:
Cash and cash equivalents		77
Recurring | Money market funds | Level 1
Assets:
Cash and cash equivalents		77
Recurring | Money market funds | Level 2
Assets:
Cash and cash equivalents		0
Recurring | Money market funds | Level 3
Assets:
Cash and cash equivalents		$ 0