XML 61 R45.htm IDEA: XBRL DOCUMENT v3.21.1
Note 9 - Series B Mandatorily Redeemable Preferred Stock (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Interest Expense, Total $ 8,813,067 $ 10,649,646
Redeemable Convertible Preferred Stock Series B [Member]    
Stock Redeemed or Called During Period, Shares (in shares)   16,900
Stock Redeemed or Called During Period, Value   $ 16,900,000
Preferred Stock, Shares Outstanding, Ending Balance (in shares) 0 0
Interest Expense, Total $ 0 $ 100,000
Unamortized Deferred Stock Costs $ 0 $ 0
Preferred Stock, Shares Issued, Total (in shares) 0 0