CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 23,342	$ 23,644
Restricted cash	2,626	0
Accounts receivable, less allowance of $20,661 and $18,107 at June 30, 2020 and December 31, 2019, respectively	27,906	20,652
Inventories	3,107	1,608
Prepaid income taxes and income taxes receivable	277	383
Prepaid expenses and other current assets	3,748	4,190
Total current assets	61,006	50,477
PROPERTY, EQUIPMENT AND FACILITIES - At cost, net of accumulated depreciation and amortization of $175,183 and $172,408 at June 30, 2020 and December 31, 2019, respectively	49,172	49,345
OTHER ASSETS:
Noncurrent restricted cash	0	15,000
Noncurrent receivables, less allowance of $2,932 and $2,260 at June 30, 2020 and December 31, 2019, respectively	15,787	15,337
Operating lease right-of-use assets	53,397	49,065
Goodwill	14,536	14,536
Other assets, net	1,003	1,003
Total other assets	84,723	94,941
TOTAL ASSETS	194,901	194,763
CURRENT LIABILITIES:
Current portion of credit agreement	2,000	2,000
Unearned tuition	17,573	23,411
Accounts payable	14,058	14,584
Accrued expenses	12,162	7,869
CARES Act student funds liability	2,626	0
CARES Act institutional funds liability	11,837	0
Current portion of operating lease liabilities	8,222	9,142
Other short-term liabilities	93	199
Total current liabilities	68,571	57,205
NONCURRENT LIABILITIES:
Long-term credit agreement and term loan	16,121	32,028
Pension plan liabilities	3,850	4,015
Deferred income taxes, net	153	153
Long-term portion of operating lease liabilities	51,148	46,018
Other long-term liabilities	1,014	214
Total liabilities	140,857	139,633
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Common stock, no par value - authorized: 100,000,000 shares at June 30, 2020 and December 31, 2019; issued and outstanding: 32,386,438 shares at June 30, 2020 and 31,142,251 shares at December 31, 2019	141,377	141,377
Additional paid-in capital	30,589	30,145
Treasury stock at cost - 5,910,541 shares at June 30, 2020 and December 31, 2019	(82,860)	(82,860)
Accumulated deficit	(43,025)	(42,058)
Accumulated other comprehensive loss	(4,019)	(3,456)
Total stockholders' equity	42,062	43,148
TOTAL LIABILITIES, SERIES A CONVERTIBLE PREFERRED STOCK AND EQUITY	194,901	194,763
Series A Convertible Preferred Stock [Member]
SERIES A CONVERTIBLE PREFERRED STOCK
Preferred stock, no par value - 10,000,000 shares authorized, Series A convertible preferred shares, 12,700 shares issued and outstanding at June 30, 2020 and December 31, 2019	11,982	11,982
STOCKHOLDERS' EQUITY:
Total stockholders' equity	$ 11,982	$ 11,982