SEGMENT REPORTING (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Segment	Dec. 31, 2019 USD ($)
SEGMENT REPORTING [Abstract]
Number of reportable segments | Segment	3
Summary financial information by reporting segment [Abstract]
Revenue	$ 293,095	$ 273,342
Percentage of Total Revenue	100.00%	100.00%
Operating Income (Loss)	$ 14,781	$ 5,238
Assets	245,190	194,763
Transportation and Skilled Trades [Member]
Summary financial information by reporting segment [Abstract]
Revenue	207,434	193,722
Healthcare and Other Professions [Member]
Summary financial information by reporting segment [Abstract]
Revenue	85,661	79,620
Reportable Segments [Member] | Transportation and Skilled Trades [Member]
Summary financial information by reporting segment [Abstract]
Revenue	$ 207,434	$ 193,722
Percentage of Total Revenue	70.80%	70.90%
Operating Income (Loss)	$ 34,458	$ 21,979
Assets	133,078	121,611
Reportable Segments [Member] | Healthcare and Other Professions [Member]
Summary financial information by reporting segment [Abstract]
Revenue	$ 85,661	$ 79,620
Percentage of Total Revenue	29.20%	29.10%
Operating Income (Loss)	$ 11,068	$ 7,588
Assets	32,753	27,945
Corporate [Member]
Summary financial information by reporting segment [Abstract]
Revenue	$ 0	$ 0
Percentage of Total Revenue	0.00%	0.00%
Operating Income (Loss)	$ (30,745)	$ (24,329)
Assets	$ 79,359	$ 45,207