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Marketable Securities | 12 Months Ended
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Dec. 31, 2022
Marketable Securities |
Marketable Securities | 6. Marketable Securities Marketable securities in equity securities with readily determinable market prices consisted of the following as of December 31, 2022 and 2021:
Schedule of marketable securities |  |  |  |  |  |  |  |  |  |  |  |
|  | Marketable equity securities at December 31, 2022 |
|  |  |  |  |  | Gross unrealized |  |  | Gross unrealized |  |  |  |  |
|  | Cost |  |  | gains |  |  | losses |  |  | Fair value |
Common shares |  | $ | 10,271,000 |  |  | $ | 383,000 |  |  | $ | (4,064,000 | ) |  | $ | 6,590,000 |
|  | Marketable equity securities at December 31, 2021 |
|  |  |  |  |  | Gross unrealized |  |  | Gross unrealized |  |  |  |  |
|  | Cost |  |  | gains |  |  | losses |  |  | Fair value |
Common shares |  | $ | 53,475,000 |  |  | $ | 32,000 |  |  | $ | (13,127,000 | ) |  | $ | 40,380,000 |
The following table presents additional information about marketable equity securities:
Schedule of marketable equity securities |  |  |  |
|  | Marketable |
|  | Equity Securities |
Balance at January 1, 2021 |  | $ | 2,563,000 |
Purchases of marketable equity securities in operations |  |  | 385,235,000 |
Purchases of marketable equity securities |  |  | 2,765,000 |
Conversion of debt securities to marketable securities |  |  | 2,656,000 |
Sales of marketable equity securities in operations |  |  | (355,837,000 | )
Sales of marketable equity securities |  |  | (4,062,000 | )
Realized gains on marketable equity securities |  |  | 27,377,000 |
Realized losses on marketable equity securities |  |  | (6,190,000 | )
Unrealized losses on marketable equity securities |  |  | (14,127,000 | )
Balance at December 31, 2021 |  |  | 40,380,000 |
Purchases of marketable equity securities in operations |  |  | 107,958,000 |
Purchases of marketable equity securities |  |  | 2,017,000 |
Conversion of debt securities to marketable securities |  |  | 44,782,000 |
Conversion of loans receivable to marketable securities |  |  | 11,502,000 |
Conversion of interest receivable to marketable securities |  |  | 386,000 |
Sales of marketable equity securities in operations |  |  | (186,909,000 | )
Sales of marketable equity securities |  |  | (11,748,000 | )
Realized gains on marketable equity securities |  |  | 44,307,000 |
Realized losses on marketable equity securities |  |  | (32,196,000 | )
Unrealized losses on marketable equity securities |  |  | (13,889,000 | )
Balance at December 31, 2022 |  | $ | 6,590,000 |
At December 31, 2022 and 2021, the Company had invested in the marketable equity securities of certain publicly traded companies. The Company’s investment in marketable equity securities is revalued on each balance sheet date.

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