SEGMENTS (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) Segment	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
SEGMENTS [Abstract]
Number of reportable segments | Segment			2
Summary financial information by reporting segment [Abstract]
Revenues	$ 89,059	$ 78,792	$ 247,520	$ 211,303
Percentage of Total Revenue	100.00%	100.00%	100.00%	100.00%
Operating Income (Loss)	$ 5,745	$ 3,840	$ 15,217	$ 3,655
Total Assets	253,456		253,456		$ 245,190
Transportation and Skilled Trades [Member]
Summary financial information by reporting segment [Abstract]
Revenues	64,950	56,828	177,586	148,799
Healthcare and Other Professions [Member]
Summary financial information by reporting segment [Abstract]
Revenues	24,109	21,964	69,934	62,504
Reportable Segments [Member] | Transportation and Skilled Trades [Member]
Summary financial information by reporting segment [Abstract]
Revenues	$ 64,950	$ 56,828	$ 177,586	$ 148,799
Percentage of Total Revenue	72.90%	72.10%	71.70%	70.40%
Operating Income (Loss)	$ 11,842	$ 9,138	$ 35,423	$ 18,848
Total Assets	132,948		132,948		133,078
Reportable Segments [Member] | Healthcare and Other Professions [Member]
Summary financial information by reporting segment [Abstract]
Revenues	$ 24,109	$ 21,964	$ 69,934	$ 62,504
Percentage of Total Revenue	27.10%	27.90%	28.30%	29.60%
Operating Income (Loss)	$ 1,833	$ 1,654	$ 7,743	$ 6,388
Total Assets	33,516		33,516		32,753
Corporate [Member]
Summary financial information by reporting segment [Abstract]
Revenues	0	0	0	0
Operating Income (Loss)	(7,930)	$ (6,952)	(27,949)	$ (21,581)
Total Assets	$ 86,992		$ 86,992		$ 79,359