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Shareholders' Equity - Summary of Stock Option Activity (Details) (10-K) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Options Granted 1,000 2,000    
Options Exercised    
Stock Option Grants [Member]            
Options Outstanding, beginning balance     142,000 147,000 147,000 156,000
Options Granted         3,000 2,000
Options Exercised        
Options Cancelled         (6,000) (6,000)
Options Forfeited         (2,000) (4,000)
Options Expired         (1,000)
Options Outstanding, ending balance         142,000 147,000
Options vested and exercisable         140,000  
Weighted Average Exercise Price Per Share Outstanding, beginning balance     $ 18.26 $ 18.20 $ 18.20 $ 17.74
Weighted Average Exercise Price Per Share Granted         3.15 4.44
Weighted Average Exercise Price Per Share Exercised        
Weighted Average Exercise Price Per Share Cancelled         13.32 10.42
Weighted Average Exercise Price Per Share Forfeited         6.24 6.38
Weighted Average Exercise Price Per Share Expired         16.00
Weighted Average Exercise Price Per Share Outstanding, ending balance         18.26 $ 18.20
Weighted Average Exercise Price Per Share vested and exercisable         $ 18.43  
Weighted Average Remaining Contractual Life (in years) Outstanding, beginning balance           7 years 1 month 13 days
Weighted Average Remaining Contractual Life (in years) Outstanding, ending balance         5 years 1 month 20 days 6 years 29 days
Weighted Average Remaining Contractual Life (in years) vested and exercisable         5 years 1 month 6 days  
Aggregate Intrinsic Value Outstanding, beginning balance      
Aggregate Intrinsic Value Outstanding, ending balance          
Aggregate Intrinsic Value vested and exercisable