Quarterly report [Sections 13 or 15(d)]

Investments - Additional Information (Details)

v3.25.1
Investments - Additional Information (Details)
₩ / shares in Units, $ / shares in Units, ₩ in Billions
1 Months Ended 3 Months Ended
Dec. 30, 2024
Dec. 28, 2023
USD ($)
Dec. 28, 2023
JPY (¥)
Sep. 28, 2020
USD ($)
$ / shares
Sep. 28, 2020
₩ / shares
Apr. 30, 2025
USD ($)
Apr. 30, 2024
USD ($)
Oct. 31, 2018
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Apr. 30, 2025
KRW (₩)
Dec. 31, 2024
USD ($)
Apr. 30, 2024
KRW (₩)
Dec. 31, 2018
USD ($)
Oct. 31, 2018
JPY (¥)
Schedule Of Investments [Line Items]                              
Call option agreement date       Sep. 28, 2020                      
Realized net gain (loss) on investment bond           $ (531,000) $ (347,000)                
Foreign currency translation adjustment                 $ 4,000 $ 18,000          
Net loan receivable from EJ Holdings                 16,869,000     $ 16,869,000      
Reverse stock split reverse stock split at a rate of 1-for-10                            
Niihara International, Inc [Member]                              
Schedule Of Investments [Line Items]                              
Shares sale and assignment   $ 25,304 ¥ 3,600,000                        
EJ Holdings, Inc. [Member]                              
Schedule Of Investments [Line Items]                              
Secured debt percentage               1.00%             1.00%
Investment amount                           $ 32,000  
Percentage of voting interest                           40.00%  
Unsecured debt               $ 13,600,000              
Debt instrument, maturity date               Sep. 30, 2028              
Loan receivables                 25,800,000     25,800,000      
Foreign currency translation adjustment   $ 1,500,000                          
Net loan receivable from EJ Holdings                 $ 16,900,000     $ 16,900,000      
EJ Holdings, Inc. [Member] | Japan Industrial Partners [Member]                              
Schedule Of Investments [Line Items]                              
Equity method investment, ownership percentage                           60.00%  
Unsecured Debt Due On December 28, 2027 [Member] | EJ Holdings, Inc. [Member]                              
Schedule Of Investments [Line Items]                              
Debt instrument, maturity date               Dec. 28, 2027              
Aggregated principal amount | ¥                             ¥ 3,637,335,720
Maximum [Member]                              
Schedule Of Investments [Line Items]                              
Percentage of principal amount of convertible bond to be repurchased       50.00%                      
Telcon, Inc. ("Telcon") [Member]                              
Schedule Of Investments [Line Items]                              
Convertible bond maturity date       Oct. 16, 2030                      
Secured debt percentage       2.10% 2.10%                    
Convertible bond initial conversion price | (per share)       $ 8.00 ₩ 9,232                    
Convertible Bond Purchase Agreement [Member] | Telcon, Inc. ("Telcon") [Member]                              
Schedule Of Investments [Line Items]                              
Purchase of principal amount of convertible bond at face value       $ 26,100,000                      
API Supply Agreement [Member] | Telcon RF Pharmaceuticals, Inc. ("Telcon") [Member]                              
Schedule Of Investments [Line Items]                              
Offset amount against principal amount of convertible bond             2,500,000           ₩ 3.5    
Cash proceeds to shortfall in revenue and profits             $ 640,000                
API Supply Agreement [Member] | Telcon RF Pharmaceuticals, Inc. ("Telcon") [Member] | Subsequent Event                              
Schedule Of Investments [Line Items]                              
Offset amount against principal amount of convertible bond           2,100,000         ₩ 3.1        
Cash proceeds to shortfall in revenue and profits           $ 34,000                  
API Supply Agreement [Member] | Telcon RF Pharmaceuticals, Inc. ("Telcon") [Member] | Maximum [Member]                              
Schedule Of Investments [Line Items]                              
Annual Profit       2,500,000                      
API Supply Agreement [Member] | Telcon RF Pharmaceuticals, Inc. ("Telcon") [Member] | Minimum [Member]                              
Schedule Of Investments [Line Items]                              
Annual Revenue       $ 5,000,000