Annual report pursuant to Section 13 and 15(d)

INVESTMENTS (Details Narrative)

v3.21.1
INVESTMENTS (Details Narrative)
$ / shares in Units, ₩ in Millions
1 Months Ended 12 Months Ended
Sep. 28, 2020
USD ($)
$ / shares
Feb. 28, 2020
Oct. 31, 2018
USD ($)
Jul. 31, 2017
USD ($)
shares
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
$ / shares
Dec. 31, 2020
KRW (₩)
Oct. 28, 2020
USD ($)
Dec. 31, 2019
KRW (₩)
Dec. 31, 2018
USD ($)
Schedule Of Investments [Line Items]                    
Impairment loss for equity securities           $ 515,000        
Secured debt percentage   10.00%                
Call option agreement date Sep. 28, 2020                  
Debt instrument, maturity date   Apr. 21, 2021                
Debt instrument annual interest   10.00%                
EJ Holding, Inc. [Member]                    
Schedule Of Investments [Line Items]                    
Secured debt percentage     1.00%              
Investment amount                   $ 32,000
Percentage of voting interest                   40.00%
Unsecured debt     $ 13,600,000         $ 6,500,000    
Debt instrument, maturity date     Sep. 30, 2028              
Debt instrument annual interest     1.00%              
Unsecured debt, additional borrowings         $ 4,000,000.0          
Loan receivables         18,600,000 $ 13,800,000        
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]                    
Shares held as marketable securities | shares       6,643,559            
Investment       $ 31,800,000            
Investment, closing price | $ / shares           $ 4.20        
Net unrealized losses on available-for-sales on marketable securities           $ 43,200,000        
Convertible notes payable, carrying amount         $ 27,900,000   ₩ 30      
Convertible bond maturity date Oct. 16, 2030       Oct. 16, 2030          
Secured debt percentage 2.10%       2.10%   2.10%      
Convertible bond initial conversion price | $ / shares $ 8.00                  
Debt instrument annual interest 2.10%       2.10%   2.10%      
Telcon, Inc. ("Telcon") [Member] | API Supply Agreement [Member] | 10-year Convertible Bond [Member]                    
Schedule Of Investments [Line Items]                    
Proceeds from sale of convertible notes         $ 35,600,000          
Convertible notes payable, carrying amount           26,100,000     ₩ 30,000  
Telcon, Inc. ("Telcon") [Member] | Convertible Bond Purchase Agreement [Member]                    
Schedule Of Investments [Line Items]                    
Purchase of principal amount of convertible bond at face value $ 26,100,000                  
Telcon, Inc. ("Telcon") [Member] | Marketable Equity Securities [Member]                    
Schedule Of Investments [Line Items]                    
Fair value recorded in investment           $ 27,900,000        
Japan Industrial Partners [Member] | EJ Holding, Inc. [Member]                    
Schedule Of Investments [Line Items]                    
Equity method investment, ownership percentage                   60.00%