Schedule of Marketable Securities (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Balances at beginning of year	$ 15,617,000	$ 8,447,000
Additions	17,273,000	34,914,000
Sale of marketable securities	(5,221,000)	(8,666,000)
Designation for dividend distribution		(10,790,000)
Change in fair value of marketable securities	(6,020,000)	(8,288,000)
Transfers
Realized loss on sale of marketable securities	(8,799,000)	804,000
Impairments of marketable securities	(3,664,000)
Balances at ending of year	9,186,000	15,617,000
Convertible Debentures [Member]
Balances at beginning of year	4,187,000	683,000
Additions	938,000	4,602,000
Sale of marketable securities	(261,000)	(510,000)
Designation for dividend distribution		(213,000)
Change in fair value of marketable securities	453,000	(375,000)
Transfers	325,000
Realized loss on sale of marketable securities	(606,000)
Impairments of marketable securities	(3,664,000)
Balances at ending of year	1,372,000	4,187,000
Common Stock [Member]
Balances at beginning of year	10,735,000	7,764,000
Additions	14,735,000	29,281,000
Sale of marketable securities	(4,960,000)	(8,156,000)
Designation for dividend distribution		(10,577,000)
Change in fair value of marketable securities	(4,721,000)	(7,577,000)
Transfers	(356,000)
Realized loss on sale of marketable securities	(8,193,000)
Impairments of marketable securities
Balances at ending of year	7,240,000	10,735,000
Preferred Stock [Member]
Balances at beginning of year	599,000
Additions	1,600,000	1,031,000
Sale of marketable securities
Designation for dividend distribution
Change in fair value of marketable securities	(1,658,000)	(432,000)
Transfers	31,000
Realized loss on sale of marketable securities
Impairments of marketable securities
Balances at ending of year	572,000	599,000
Warrant [Member]
Balances at beginning of year	96,000
Additions
Sale of marketable securities
Designation for dividend distribution
Change in fair value of marketable securities	(94,000)	96,000
Transfers
Realized loss on sale of marketable securities
Impairments of marketable securities
Balances at ending of year	$ 2,000	$ 96,000

Marketable securities addition.

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- Definition

Marketable securities designation for dividend distribution.

+ References

No definition available.

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Marketable securities impairments.

+ References

No definition available.

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Marketable securities transfers.

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- Definition

Amount of investment in marketable security.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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Amount of unrealized and realized gain (loss) on investment in marketable security, including other-than-temporary impairment (OTTI).

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No definition available.

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Amount of realized gain (loss) on investment in marketable security.

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The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period.

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No definition available.

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