INCOME TAXES - Unrecognized tax benefits, interest accrued, and range of reasonably possible changes (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Unrecognized tax benefits
Unrecognized tax benefits	$ 619
Accrued interest on unrecognized tax benefits	36
Portion that, if recognized, would reduce tax expense and effective tax rate	655
Reasonably possible reduction to the balance of unrecognized tax in subsequent year	300
Portion that, if recognized, would reduce tax expense and effective tax rate in subsequent year	$ 300