CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 69,619	$ 83,307
Accounts receivable, less allowance of $27,364 and $26,837 at September 30, 2022 and December 31, 2021, respectively	31,902	26,159
Inventories	2,714	2,721
Prepaid expenses and other current assets	2,255	4,881
Assets held for sale	4,559	4,559
Total current assets	111,049	121,627
PROPERTY, EQUIPMENT AND FACILITIES - At cost, net of accumulated depreciation and amortization of $147,843 and $153,335 at September 30, 2022 and December 31, 2021, respectively	23,842	23,119
OTHER ASSETS:
Noncurrent receivables, less allowance of $6,438 and $5,084 at September 30, 2022 and December 31, 2021, respectively	21,864	20,028
Deferred income taxes, net	23,644	23,708
Operating lease right-of-use assets	95,522	91,487
Goodwill	14,536	14,536
Other assets, net	819	794
Total other assets	156,385	150,553
TOTAL ASSETS	291,276	295,299
CURRENT LIABILITIES:
Unearned tuition	22,744	25,405
Accounts payable	16,242	12,297
Accrued expenses	10,038	15,669
Income taxes payable	514	1,017
Current portion of operating lease liabilities	10,313	11,479
Other short-term liabilities	32	15
Total current liabilities	59,883	65,882
NONCURRENT LIABILITIES:
Pension plan liabilities	1,250	1,607
Long-term portion of operating lease liabilities	91,999	86,410
Total liabilities	153,132	153,899
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Common stock, no par value - authorized: 100,000,000 shares at September 30, 2022 and December 31, 2021; issued and outstanding: 26,255,580 shares at September 30, 2022 and 27,000,687 shares at December 31, 2021	51,784	141,377
Additional paid-in capital	32,814	32,439
Treasury stock at cost - 0 and 5,910,541 shares at September 30, 2022 and December 31, 2021, respectively	0	(82,860)
Retained earnings	42,865	39,702
Accumulated other comprehensive loss	(1,301)	(1,240)
Total stockholders' equity	126,162	129,418
TOTAL LIABILITIES, SERIES A CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS EQUITY	291,276	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 September 30, 2022 and December 31, 2021	$ 11,982	$ 11,982