STOCK-BASED COMPENSATION - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 545	$ 699	$ 1,786	$ 1,795
Restricted common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	17	59	91	241
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 528	$ 640	$ 1,695	$ 1,554
Restricted stock units | Performance Conditions, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target, Group adjusted EBITDA, percentage	100.00%		100.00%
Restricted stock units, time | Coit Staffing, Inc. | Performance Conditions, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target, Group adjusted EBITDA, percentage	100.00%		100.00%