XML 113 R89.htm IDEA: XBRL DOCUMENT v3.20.2
Note 9 - Series B Mandatorily Redeemable Preferred Stock (Details Textual)
 3 Months Ended 6 Months Ended 12 Months Ended
Aug. 01, 2017
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2015
shares
Debt Issuance Costs, Net, Total   $ 500,000   $ 500,000        
Interest Expense, Total   2,273,355 $ 2,491,870 4,827,202 $ 5,037,073 $ 10,649,646 $ 13,041,016  
Redeemable Convertible Preferred Stock Series B [Member]                
Preferred Stock, Shares Issued, Total (in shares) | shares           0 16,900 35,000
Debt Instrument, Number of Extension Options 2              
Debt Instrument, Term of Extension Options (Year) 1 year              
Preferred Stock, Redemption Extension Fee $ 307,000              
Debt Issuance Costs, Net, Total $ 3,100,000              
Interest Expense, Total     $ 61,000   $ 122,000 $ 122,000 $ 147,000  
Unamortized Deferred Stock Costs   $ 0   $ 0   $ 0 $ 122,000  
Stock Redeemed or Called During Period, Shares (in shares) | shares           16,900 13,800  
Stock Redeemed or Called During Period, Value           $ 16,900,000 $ 13,800,000