Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS (Details Narrative)

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INVESTMENTS (Details Narrative) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 21, 2020
Oct. 31, 2018
Jul. 31, 2017
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Schedule Of Investments [Line Items]              
Shares held as marketable securities       6,643,559      
Impairment loss on equity securities       $ 0 $ 0 $ 515,000  
Net unrealized gain (loss) on marketable securities available-for-sale       6,800,000 $ (6,500,000)    
Debt instrument, maturity date Apr. 21, 2021            
EJ Holding, Inc. [Member]              
Schedule Of Investments [Line Items]              
Investment amount             $ 32,000
Percentage of voting interest             40.00%
Unsecured debt   $ 13,600,000   $ 13,900,000   $ 13,800,000  
Debt instrument, maturity date   Sep. 30, 2028          
Debt instrument annual interest   1.00%          
Telcon, Inc. ("Telcon") [Member]              
Schedule Of Investments [Line Items]              
Shares held as marketable securities       6,643,559   6,643,559  
Investment     $ 31,800,000        
Investment, closing price       $ 5.23   $ 4.20  
Telcon, Inc. ("Telcon") [Member] | API Supply Agreement [Member] | 10-year Convertible Bond [Member]              
Schedule Of Investments [Line Items]              
Convertible notes payable, carrying amount           $ 31,800,000  
Japan Industrial Partners [Member] | EJ Holding, Inc. [Member]              
Schedule Of Investments [Line Items]              
Equity interest             60.00%