GOODWILL AND LONG-LIVED ASSETS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
GOODWILL AND LONG-LIVED ASSETS [Abstract]
Long lived asset impairment	$ 0
Changes in carrying amount of goodwill [Abstract]
Gross Goodwill Balance	115,872		115,872
Accumulated Impairment Losses	(93,665)		(93,665)
Net Goodwill Balance	22,207		22,207
Adjustments	0
Finite-Lived Intangible Assets [Line Items]
Amortization	100	100
Net carrying amount at end of period	110
Intangible Assets (Excluding Goodwill) [Abstract]
Gross carrying amount, Total	1,923
Adjustments	0
Gross carrying amount, Total	1,923
Accumulated amortization, Total	733
Amortization	17
Accumulated amortization, Total	750
Net carrying amount	1,173
Amortization of intangible assets	100	100
Estimated future amortization expense [Abstract]
Remainder of 2015	48
2016	21
2017	20
2018	20
2019	1
Thereafter	0
Total	110
Accreditation [Member]
Indefinite-lived Intangible Assets [Line Items]
Gross carrying amount, beginning balance	1,063
Adjustments	0
Gross carrying amount, ending balance	1,063
Accumulated amortization, beginning balance	0
Amortization	0
Accumulated amortization, ending balance	0
Net carrying amount	1,063
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount, beginning balance	310
Adjustments	0
Gross carrying amount, ending balance	310
Accumulated amortization, beginning balance	264
Amortization	11
Accumulated amortization, ending balance	275
Net carrying amount at end of period	35
Weighted average amortization period	7 years
Intangible Assets (Excluding Goodwill) [Abstract]
Amortization of intangible assets	11
Estimated future amortization expense [Abstract]
Total	35
Curriculum [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount, beginning balance	550
Adjustments	0
Gross carrying amount, ending balance	550
Accumulated amortization, beginning balance	469
Amortization	6
Accumulated amortization, ending balance	475
Net carrying amount at end of period	75
Weighted average amortization period	10 years
Intangible Assets (Excluding Goodwill) [Abstract]
Amortization of intangible assets	6
Estimated future amortization expense [Abstract]
Total	$ 75