CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 66,356	$ 46,074
Restricted cash	4,212	4,213
Short-term investments	24,344	14,758
Accounts receivable, less allowance for credit losses of $31,742 and $28,560 at June 30, 2023 and December 31, 2022, respectively	32,050	37,175
Inventories	2,555	2,618
Prepaid expenses and other current assets	7,973	4,738
Assets held for sale	0	4,559
Total current assets	137,490	114,135
PROPERTY, EQUIPMENT AND FACILITIES - At cost, net of accumulated depreciation and amortization of $138,699 and $146,367 at June 30, 2023 and December 31, 2022, respectively	32,508	23,940
OTHER ASSETS:
Noncurrent receivables, less allowance for credit losses of $15,865 and $6,810 at June 30, 2023 and December 31, 2022, respectively	15,341	22,734
Deferred income taxes, net	25,210	22,312
Operating lease right-of-use assets	88,966	93,097
Goodwill	10,742	14,536
Other assets, net	1,161	812
Total other assets	141,420	153,491
TOTAL ASSETS	311,418	291,566
CURRENT LIABILITIES:
Unearned tuition	22,928	24,154
Accounts payable	16,844	10,496
Accrued expenses	12,347	8,653
Income taxes payable	6,095	2,055
Current portion of operating lease liabilities	10,408	9,631
Other short-term liabilities	40	31
Total current liabilities	68,662	55,020
NONCURRENT LIABILITIES:
Pension plan liabilities	638	668
Long-term portion of operating lease liabilities	87,653	91,001
Total liabilities	156,953	146,689
STOCKHOLDERS' EQUITY:
Common stock, no par value - authorized 100,000,000 shares at June 30, 2023 and December 31, 2022, issued and outstanding 31,359,110 shares at June 30, 2023 and 31,147,925 shares at December 31, 2022.	48,181	49,072
Additional paid-in capital	46,874	45,540
Retained earnings	60,423	51,225
Accumulated other comprehensive loss	(1,013)	(960)
Total stockholders' equity	154,465	144,877
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 311,418	$ 291,566