CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 47,150	$ 38,026
Accounts receivable, less allowance of $26,303 and $25,174 at September 30, 2021 and December 31, 2020, respectively	29,985	30,021
Inventories	3,155	2,394
Prepaid income taxes	238	0
Prepaid expenses and other current assets	2,973	3,723
Assets held for sale	27,452	0
Total current assets	110,953	74,164
PROPERTY, EQUIPMENT AND FACILITIES - At cost, net of accumulated depreciation and amortization of $152,217 and $176,300 at September 30, 2021 and December 31, 2020, respectively	23,251	48,388
OTHER ASSETS:
Noncurrent receivables, less allowance of $4,789 and $3,465 at September 30, 2021 and December 31, 2020, respectively	18,805	16,463
Deferred income taxes, net	32,082	35,718
Operating lease right-of-use assets	53,033	55,187
Goodwill	14,536	14,536
Other assets, net	796	734
Total other assets	119,252	122,638
TOTAL ASSETS	253,456	245,190
CURRENT LIABILITIES:
Current portion of credit agreement	2,000	2,000
Unearned tuition	24,691	23,453
Accounts payable	16,036	15,676
Accrued expenses	15,778	16,692
Income taxes payable	0	491
Current portion of operating lease liabilities	10,314	8,504
Other short-term liabilities	56	26
Total current liabilities	68,875	66,842
NONCURRENT LIABILITIES:
Long-term credit agreement	13,848	15,212
Pension plan liabilities	4,850	4,252
Long-term portion of operating lease liabilities	49,135	52,702
Other long-term liabilities	2,803	3,133
Total liabilities	139,511	142,141
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Common stock, no par value - authorized: 100,000,000 shares at September 30, 2021 and December 31, 2020; issued and outstanding: 26,978,432 shares at September 30, 2021 and 26,476,329 shares at December 31, 2020	141,377	141,377
Additional paid-in capital	31,643	30,512
Treasury stock at cost - 5,910,541 shares at September 30, 2021 and December 31, 2020	(82,860)	(82,860)
Retained earnings	16,045	6,203
Accumulated other comprehensive loss	(4,242)	(4,165)
Total stockholders' equity	101,963	91,067
TOTAL LIABILITIES, SERIES A CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY	253,456	245,190
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, 2021 and December 31, 2020	$ 11,982	$ 11,982