CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 75,992	$ 46,074
Restricted cash	4,277	4,213
Short-term investments	0	14,758
Accounts receivable, less allowance of $34,441 and $28,560 at December 31, 2023 and 2022, respectively	35,692	37,175
Inventories	2,948	2,618
Prepaid expenses and other current assets	5,556	4,738
Asset held for sale	10,198	4,559
Total current assets	134,663	114,135
PROPERTY, EQUIPMENT AND FACILITIES - At cost, net of accumulated depreciation and amortization of $140,161 and $146,367 at December 31, 2023 and 2022, respectively	50,857	23,940
OTHER ASSETS:
Noncurrent receivables, less allowance of $19,370 and $6,810 at December 31, 2023 and 2022, respectively	17,504	22,734
Deferred income taxes, net	23,217	22,312
Operating lease right-of-use assets	89,923	93,097
Finance lease right-of-use assets	15,797	0
Goodwill	10,742	14,536
Other assets, net	1,787	812
Pension plan assets, net	759	0
Total other assets	159,729	153,491
TOTAL ASSETS	345,249	291,566
CURRENT LIABILITIES:
Unearned tuition	26,906	24,154
Accounts payable	18,152	10,496
Accrued expenses	13,680	8,653
Income taxes payable	2,832	2,055
Current portion of operating lease liabilities	11,737	9,631
Current portion of finance lease liabilities	70	0
Other short-term liabilities	33	31
Total current liabilities	73,410	55,020
NONCURRENT LIABILITIES:
Pension plan liabilities	0	668
Long-term portion of operating lease liabilities	88,853	91,001
Long-term portion of finance lease liabilities	16,126	0
Other long-term liabilities	56	0
Total liabilities	178,445	146,689
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Common stock, no par value - authorized 100,000,000 shares at December 31, 2023 and 2022, issued and outstanding 31,359,110 shares at December 31, 2023 and 31,147,925 shares at December 31, 2022	48,181	49,072
Additional paid-in capital	49,380	45,540
Retained earnings	69,279	51,225
Accumulated other comprehensive loss	(36)	(960)
Total stockholders' equity	166,804	144,877
TOTAL LIABILITIES, SERIES A CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY	345,249	291,566
Series A Convertible Preferred Stock [Member]
SERIES A CONVERTIBLE PREFERRED STOCK
Preferred stock, no par value - authorized 10,000,000 shares at December 31, 2023 and 2022, respectively.	$ 0	$ 0