Quarterly report [Sections 13 or 15(d)]

Investments - Additional Information (Details)

v3.26.1
Investments - Additional Information (Details)
₩ / shares in Units, $ / shares in Units, ₩ in Millions
1 Months Ended 3 Months Ended
Dec. 30, 2024
Dec. 28, 2023
USD ($)
Dec. 28, 2023
JPY (¥)
Sep. 28, 2020
₩ / shares
Sep. 28, 2020
USD ($)
$ / shares
Apr. 30, 2026
USD ($)
Apr. 30, 2026
KRW (₩)
Apr. 30, 2025
USD ($)
Oct. 31, 2018
USD ($)
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Apr. 30, 2026
KRW (₩)
Dec. 31, 2025
USD ($)
Aug. 05, 2025
₩ / shares
Apr. 30, 2025
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)                  
Foreign currency translation adjustment                   $ 22,000 $ 4,000            
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        
Aggregated principal amount                 $ 6,500,000               ¥ 1,037,335,720
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)       ₩ 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             ₩ 3,100.0    
Cash proceeds to shortfall in revenue and profits               $ 34,000                  
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           $ 2,600,000           ₩ 3,800.0          
Cash proceeds to shortfall in revenue and profits           $ 202,000 ₩ 297.1                    
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