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Leases (Details Narrative) (10-K) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Jan. 02, 2019
Operating leases description     The Company has operating leases for its warehouse facility and for equipment under agreements that expire at various dates through 2023.   The Company has entered into operating leases for office and production facilities and equipment under agreements that expire at various dates through 2026.    
Financing leases description     The Company also has property held under finance leases that expire at various dates through 2021.   The Company also has property held under finance leases that expire at various dates through 2021.    
Operating lease liabilities $ 46,000   $ 46,000   $ 3,300,000 $ 3,458,000 $ 3,458,000
Operating lease right-of-use assets $ 44,000   $ 44,000   $ 2,101,000 $ 2,336,000
Operating leases weighted-average remaining lease term 2 years 1 month 6 days   2 years 1 month 6 days   6 years 3 months 19 days    
Operating leases weighted-average discount rate lease 6.23%   6.23%   7.25%    
Financing leases weighted-average remaining lease term 1 year 4 months 24 days   1 year 4 months 24 days   1 year 10 months 25 days    
Financing leases weighted-average discount rate lease 5.52%   5.52%   5.51%    
Financing lease cost $ 10,000 $ 4,000 $ 10,000 $ 32,000 $ 48,000 191,000  
Selling, General and Administrative Expenses [Member]              
Operating lease expense $ 131,000 $ 135,000 $ 264,000 $ 270,000 $ 542,000 $ 407,000