CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 40,280	$ 46,074
Restricted cash	4,209	4,213
Short-term investments	14,758	14,758
Accounts receivable, less allowance for credit losses of $31,456 and $28,560 at March 31, 2023 and December 31, 2022, respectively	34,856	37,175
Inventories	2,636	2,618
Prepaid expenses and other current assets	6,289	4,738
Asset held for sale	4,559	4,559
Total current assets	107,587	114,135
PROPERTY, EQUIPMENT AND FACILITIES - At cost, net of accumulated depreciation and amortization of $147,158 and $146,367 at March 31, 2023 and December 31, 2022, respectively	26,147	23,940
OTHER ASSETS:
Noncurrent receivables, less allowance for credit losses of $15,143 and $6,810 at March 31, 2023 and December 31, 2022, respectively	14,642	22,734
Deferred income taxes, net	25,210	22,312
Operating lease right-of-use assets	92,134	93,097
Goodwill	14,536	14,536
Other assets, net	837	812
Total other assets	147,359	153,491
TOTAL ASSETS	281,093	291,566
CURRENT LIABILITIES:
Unearned tuition	20,979	24,154
Accounts payable	12,944	10,496
Accrued expenses	9,006	8,653
Income taxes payable	1,547	2,055
Current portion of operating lease liabilities	10,057	9,631
Other short-term liabilities	41	31
Total current liabilities	54,574	55,020
NONCURRENT LIABILITIES:
Pension plan liabilities	699	668
Long-term portion of operating lease liabilities	90,566	91,001
Total liabilities	145,839	146,689
STOCKHOLDERS' EQUITY:
Common stock, no par value - authorized 100,000,000 shares at March 31, 2023 and December 31, 2022, issued and outstanding 31,398, 557 shares at March 31, 2023 and 31,147,925 shares at December 31, 2022.	48,516	49,072
Additional paid-in capital	44,573	45,540
Retained earnings	43,173	51,225
Accumulated other comprehensive loss	(1,008)	(960)
Total stockholders' equity	135,254	144,877
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 281,093	$ 291,566