Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net loss	$ (435,000)	$ (511,000)	$ (747,000)	$ (638,000)	$ (816,000)	$ (1,572,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of operating lease right-of-use asset			11,000	20,000
Income from investments in unconsolidated entities, net			(4,000)	266,000
Distributed earnings from unconsolidated entities			0	23,000
Changes in:
Income taxes payable			(166,000)	(1,000)
Other current assets			15,000	(12,000)
Accounts payable and accrued expenses			(11,000)	(79,000)
Operating lease right-of-use liability			(10,000)	(22,000)
Advances to unconsolidated entities			(4,000)	(305,000)
Net cash used in operating activities			(916,000)	(748,000)
Cash flows from investing activities
Repayments from loans to unconsolidated entities			(0)	(44,000)
Captial contributions to unconsolidated entities			0	(57,000)
Net cash provided by (used in) investing activities			0	(13,000)
Cash flows from financing activities:
Sale of Shares (not yet issued)			545,000
Issuance of common stock			2,100,000	0
Net cash provided by (used in) financing activities			2,645,000	0
Net change in cash and cash equivalents			1,729,000	(761,000)
Cash and cash equivalents - beginning of period			466,000	1,537,000	1,537,000
Cash and cash equivalents - end of period	$ 2,195,000	$ 776,000	$ 2,195,000	$ 776,000	$ 466,000	$ 1,537,000