SEGMENT REPORTING (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Segment	Dec. 31, 2020 USD ($)
SEGMENT REPORTING [Abstract]
Number of reportable operating segments | Segment	2
Summary financial information by reporting segment [Abstract]
Revenue	$ 335,336	$ 293,095
Percentage of Total Revenue	100.00%	100.00%
Operating Income (Loss)	$ 49,261	$ 14,781
Assets	295,299	245,190
Transportation and Skilled Trades [Member]
Summary financial information by reporting segment [Abstract]
Revenue	240,531	207,434
Healthcare and Other Professions [Member]
Summary financial information by reporting segment [Abstract]
Revenue	94,805	85,661
Reportable Segments [Member] | Transportation and Skilled Trades [Member]
Summary financial information by reporting segment [Abstract]
Revenue	$ 240,531	$ 207,434
Percentage of Total Revenue	71.70%	70.80%
Operating Income (Loss)	$ 52,055	$ 34,458
Assets	156,531	133,078
Reportable Segments [Member] | Healthcare and Other Professions [Member]
Summary financial information by reporting segment [Abstract]
Revenue	$ 94,805	$ 85,661
Percentage of Total Revenue	28.30%	29.20%
Operating Income (Loss)	$ 11,845	$ 11,068
Assets	33,959	32,753
Corporate [Member]
Summary financial information by reporting segment [Abstract]
Revenue	$ 0	$ 0
Percentage of Total Revenue	0.00%	0.00%
Operating Income (Loss)	$ (14,639)	$ (30,745)
Assets	$ 104,809	$ 79,359