ACCRUED LIABILITIES (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
ACCRUED LIABILITIES
Compensation and fringe benefits	$ 11,317	$ 14,666
Accrued business acquisition consideration	12,559	12,388
Warranty reserve	2,038	1,869
Operating lease liabilities - current	$ 5,035	$ 4,532
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued liabilities	Accrued liabilities
Finance Lease, Liability, Current	$ 338
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities	Accrued liabilities
Deferred revenue	$ 6,977	$ 2,425
Other accrued expenses	8,031	5,776
Accrued liabilities	$ 46,295	$ 41,656