Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) (Details)

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Fair Value Measurements - Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2023
Sep. 30, 2023
Jun. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Fair Value              
Investments   $ 1     $ 1   $ 6,402
Unrealized loss on investment   (1)   $ (198) (6,401) $ (292)  
Change in fair value of warrant liability       (610)   (2,360)  
Warrant liability   0     0   0
Akerna Corp              
Fair Value              
Investments   1     1   2
Unrealized loss on investment   (1)   (2) (1) (96)  
HERBL, Inc.              
Fair Value              
Investments $ 0 0 $ 0   0   6,400
Unrealized loss on investment 6,400            
Investment impairment $ 6,400   $ 6,400        
Big Toe Ventures LLC              
Fair Value              
Investments   0     0   0
Level 1 | Akerna Corp              
Fair Value              
Unrealized loss on investment   (1)   $ (2)   $ (96)  
Fair Value, Recurring | Level 1              
Fair Value              
Fair value of assets   2,784     2,784   3,502
Fair Value, Recurring | Level 1 | Cash and Cash Equivalents              
Fair Value              
Fair value of assets   1,486     1,486   2,202
Fair Value, Recurring | Level 1 | Restricted cash              
Fair Value              
Fair value of assets   1,297     1,297   1,298
Fair Value, Recurring | Level 1 | Investments.              
Fair Value              
Fair value of assets   $ 1     $ 1   $ 2