DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) State	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) School State Campus Segment	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Business Activities [Abstract]
Number of schools | School			22
Number of states in which schools operate across the United States | State	14		14
Number of campuses treated as destination schools | Campus			5
Number of reportable segments | Segment			3
Liquidity [Abstract]
Cash balance	$ 7,800		$ 7,800		$ 4,600
Cash received under the Cares Act	14,500		14,500
Debt balance (excluding cash received from Cares Act)	6,600		6,600
Cash, cash equivalents and restricted cash	25,968	$ 10,986	25,968	$ 10,986	$ 38,644	$ 45,946
Additional borrowing capacity	21,000		21,000
Income Taxes [Abstract]
Interest and penalties expense	$ 0	$ 0	$ 0	$ 0