CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 46,074	$ 83,307
Restricted cash	4,213	0
Short-term investments	14,758	0
Accounts receivable, less allowance of $28,560 and $26,837 at December 31, 2022 and 2021, respectively	37,175	26,159
Inventories	2,618	2,721
Prepaid expenses and other current assets	4,738	4,881
Assets held for sale	4,559	4,559
Total current assets	114,135	121,627
PROPERTY, EQUIPMENT AND FACILITIES - At cost, net of accumulated depreciation and amortization of $146,367 and $153,335 at December 31, 2022 and 2021, respectively	23,940	23,119
OTHER ASSETS:
Noncurrent receivables, less allowance of $6,810 and $5,084 at December 31, 2022 and 2021, respectively	22,734	20,028
Deferred income taxes, net	22,312	23,708
Operating lease right-of-use assets	93,097	91,487
Goodwill	14,536	14,536
Other assets, net	812	794
Total other assets	153,491	150,553
TOTAL ASSETS	291,566	295,299
CURRENT LIABILITIES:
Unearned tuition	24,154	25,405
Accounts payable	10,496	12,297
Accrued expenses	8,653	15,669
Income taxes payable	2,055	1,017
Current portion of operating lease liabilities	9,631	11,479
Other short-term liabilities	31	15
Total current liabilities	55,020	65,882
NONCURRENT LIABILITIES:
Pension plan liabilities	668	1,607
Long-term portion of operating lease liabilities	91,001	86,410
Total liabilities	146,689	153,899
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Common stock, no par value - authorized 100,000,000 shares at December 31, 2022 and 2021, issued and outstanding 31,147,925 shares	49,072	141,377
Additional paid-in capital	45,540	32,439
Treasury stock at cost - zero and 5,910,541 shares at December 31, 2022 and 2021	0	(82,860)
Retained earnings	51,225	39,702
Accumulated other comprehensive loss	(960)	(1,240)
Total stockholders' equity	144,877	129,418
TOTAL LIABILITIES, SERIES A CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS EQUITY	291,566	295,299
Series A Convertible Preferred Stock [Member]
SERIES A CONVERTIBLE PREFERRED STOCK
Preferred stock, no par value - authorized 10,000,000 shares at December 31, 2022 and 2021, issued and outstanding Series A convertible preferred stock, zero shares at December 31, 2022 and 12,700 shares at December 31, 2021.	$ 0	$ 11,982