CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 26,520	$ 23,644
Restricted cash	1,073	0
Accounts receivable, less allowance of $24,502 and $18,107 at September 30, 2020 and December 31, 2019, respectively	33,553	20,652
Inventories	2,866	1,608
Prepaid income taxes and income taxes receivable	111	383
Prepaid expenses and other current assets	2,721	4,190
Total current assets	66,844	50,477
PROPERTY, EQUIPMENT AND FACILITIES - At cost, net of accumulated depreciation and amortization of $174,966 and $172,408 at September 30, 2020 and December 31, 2019, respectively	49,199	49,345
OTHER ASSETS:
Noncurrent restricted cash	0	15,000
Noncurrent receivables, less allowance of $3,420 and $2,260 at September 30, 2020 and December 31, 2019, respectively	16,690	15,337
Operating lease right-of-use assets	57,579	49,065
Goodwill	14,536	14,536
Other assets, net	968	1,003
Total other assets	89,773	94,941
TOTAL ASSETS	205,816	194,763
CURRENT LIABILITIES:
Current portion of credit agreement	2,000	2,000
Unearned tuition	19,354	23,411
Accounts payable	17,580	14,584
Accrued expenses	12,532	7,869
CARES Act student funds liability	1,073	0
CARES Act institutional funds liability	10,387	0
Current portion of operating lease liabilities	8,323	9,142
Other short-term liabilities	29	199
Total current liabilities	71,278	57,205
NONCURRENT LIABILITIES:
Long-term credit agreement and term loan	15,667	32,028
Pension plan liabilities	3,767	4,015
Deferred income taxes, net	153	153
Long-term portion of operating lease liabilities	55,239	46,018
Other long-term liabilities	2,435	214
Total liabilities	148,539	139,633
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Common stock, no par value - authorized: 100,000,000 shares at September 30, 2020 and December 31, 2019; issued and outstanding: 32,386,870 shares at September 30, 2020 and 31,142,251 shares at December 31, 2019	141,377	141,377
Additional paid-in capital	30,113	30,145
Treasury stock at cost - 5,910,541 shares at September 30, 2020 and December 31, 2019	(82,860)	(82,860)
Accumulated deficit	(39,513)	(42,058)
Accumulated other comprehensive loss	(3,822)	(3,456)
Total stockholders' equity	45,295	43,148
TOTAL LIABILITIES, SERIES A CONVERTIBLE PREFERRED STOCK AND EQUITY	205,816	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 September 30, 2020 and December 31, 2019	11,982	11,982
STOCKHOLDERS' EQUITY:
Total stockholders' equity	$ 11,982	$ 11,982