CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Cash flows from operating activities:
Net income	$ 406	$ 404
Adjustments to reconcile net income to net cash provided by continuing operating      activities:
Depreciation, depletion and amortization	2,842	2,961
Deferred income taxes	53	0
Equity in loss of joint ventures	3,625	1,604
Gain on sale of equipment and property	(17)	(733)
Stock-based compensation	324	197
Net changes in operating assets and liabilities:
Accounts receivable	(167)	(312)
Deferred costs and other assets	170	(803)
Accounts payable and accrued liabilities	(2,860)	(2,372)
Income taxes payable and receivable	295	336
Other long-term liabilities	16	32
Net cash provided by operating activities	4,687	1,314
Cash flows from investing activities:
Investments in properties	(1,206)	(3,636)
Investments in joint ventures	(12,766)	(2,394)
Return of capital from investments in joint ventures	4,988	3,227
Proceeds from sales of investments available for sale	0	4,317
Proceeds from the sale of assets	17	741
Cash held in escrow	212	204
Net cash (used in) provided by investing activities	(8,755)	2,459
Cash flows from financing activities:
Distribution to noncontrolling interest	(933)	(771)
Exercise of employee stock options	803	0
Net cash used in financing activities	(130)	(771)
Net (decrease) increase in cash and cash equivalents	(4,198)	3,002
Cash and cash equivalents at beginning of year	177,497	161,521	$ 161,521
Cash and cash equivalents at end of the period	173,299	164,523	$ 177,497
Supplemental disclosure of cash flow information:
Interest	1,004	736
Income taxes	$ 0	$ (401)