CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 66,985	$ 83,307
Accounts receivable, less allowance of $25,987 and $26,837 at June 30, 2022 and December 31, 2021, respectively	31,592	26,159
Inventories	3,082	2,721
Prepaid income taxes and income tax receivable	776	0
Prepaid expenses and other current assets	4,470	4,881
Assets held for sale	4,559	4,559
Total current assets	111,464	121,627
PROPERTY, EQUIPMENT AND FACILITIES - At cost, net of accumulated depreciation and amortization of $148,132 and $153,335 at June 30, 2022 and December 31, 2021, respectively	22,039	23,119
OTHER ASSETS:
Noncurrent receivables, less allowance of $5,591 and $5,084 at June 30, 2022 and December 31, 2021, respectively	20,268	20,028
Deferred income taxes, net	23,644	23,708
Operating lease right-of-use assets	92,630	91,487
Goodwill	14,536	14,536
Other assets, net	835	794
Total other assets	151,913	150,553
TOTAL ASSETS	285,416	295,299
CURRENT LIABILITIES:
Unearned tuition	21,682	25,405
Accounts payable	13,943	12,297
Accrued expenses	10,887	15,669
Income taxes payable	0	1,017
Current portion of operating lease liabilities	11,643	11,479
Other short-term liabilities	35	15
Total current liabilities	58,190	65,882
NONCURRENT LIABILITIES:
Pension plan liabilities	1,369	1,607
Long-term portion of operating lease liabilities	87,374	86,410
Total liabilities	146,933	153,899
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Common stock, no par value - authorized: 100,000,000 shares at June 30, 2022 and December 31, 2021; issued and outstanding: 26,924,020 shares at June 30, 2022 and 27,000,687 shares at December 31, 2021	55,979	141,377
Additional paid-in capital	32,177	32,439
Treasury stock at cost - 0 and 5,910,541 shares at June 30, 2022 and December 31, 2021, respectively	0	(82,860)
Retained earnings	39,625	39,702
Accumulated other comprehensive loss	(1,280)	(1,240)
Total stockholders' equity	126,501	129,418
TOTAL LIABILITIES, SERIES A CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS EQUITY	285,416	295,299
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, 2022 and December 31, 2021	$ 11,982	$ 11,982