Quarterly report [Sections 13 or 15(d)]

Investments - Additional Information (Details)

v3.25.3
Investments - Additional Information (Details)
₩ / shares in Units, $ / shares in Units, ₩ in Billions
1 Months Ended 3 Months Ended 9 Months Ended
Dec. 30, 2024
Dec. 28, 2023
USD ($)
Dec. 28, 2023
JPY (¥)
Sep. 28, 2020
₩ / shares
Sep. 28, 2020
USD ($)
$ / shares
Apr. 30, 2025
USD ($)
Apr. 30, 2024
USD ($)
Oct. 31, 2018
USD ($)
Sep. 30, 2025
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Sep. 30, 2024
USD ($)
Jun. 30, 2024
USD ($)
Mar. 31, 2024
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Aug. 05, 2025
₩ / shares
Apr. 30, 2025
KRW (₩)
Dec. 31, 2024
USD ($)
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                 $ 14,000 $ (33,000) $ 4,000 $ (19,000) $ 12,000 $ 18,000 $ (15,000) $ 11,000            
Net loan receivable from EJ Holdings                 16,869,000           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       25,800,000      
Foreign currency translation adjustment   $ 1,500,000                                        
Net loan receivable from EJ Holdings                 $ 16,900,000           $ 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)       ₩ 9,232 $ 8.00                                  
Bonus issued with issue price deemed | ₩ / shares                                 ₩ 0          
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           2,100,000 2,500,000                     ₩ 3.1   ₩ 3.5    
Cash proceeds to shortfall in revenue and profits           $ 34,000 $ 640,000                              
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