Insider Trading Arrangements - Murray Stahl [Member]  | 
3 Months Ended | 9 Months Ended | 
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 Sep. 30, 2023  
shares 
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 Sep. 30, 2023  
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| Trading Arrangements, by Individual | ||
| Material Terms of Trading Arrangement | On September 14, 2023, Murray Stahl, a member of our Board of Directors, on behalf of himself and accounts managed by Horizon Kinetics Asset Management LLC over which Mr. Stahl has a controlling interest, adopted a “10b5-1 trading arrangement,” as defined in Item 408 of Regulation S-K that is intended to satisfy the affirmative defense of Rule 10b5-1(c) promulgated under the Exchange Act, for the purchase of up to 738 shares of Common Stock. This 10b5-1 trading arrangement is scheduled to expire on the earlier of (i) April 15, 2024 and (ii) the acquisition of 738 shares of Common Stock. | |
| Name | Murray Stahl | |
| Title | member of our Board of Directors | |
| Rule 10b5-1 Arrangement Adopted | true | |
| Adoption Date | September 14, 2023 | |
| Rule 10b5-1 Arrangement Terminated | false | |
| Termination Date | April 15, 2024 | |
| Arrangement Duration | 214 days | |
| Aggregate Available | 738 | 738 | 
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