Quarterly report pursuant to Section 13 or 15(d)

Note 9 - Notes Payable (Details Textual)

v3.21.2
Note 9 - Notes Payable (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 23, 2021
May 18, 2020
Nov. 30, 2020
Nov. 30, 2019
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Interest Expense, Debt, Total         $ 1,000 $ 2,000 $ 4,000 $ 5,000  
Notes Payable, Current, Total         0   0   $ 745,443
Proceeds from Notes Payable, Total             0 366,000  
Gain (Loss) on Extinguishment of Debt, Total         0 0 366,000 0  
Notes Payable Issued for Prepayment of Insurance Premiums [Member] | FIF [Member]                  
Debt Instrument, Face Amount     $ 442,000 $ 349,000          
Debt Instrument, Interest Rate, Stated Percentage     3.50% 5.00%          
Debt Instrument, Term (Month)     7 months 8 months          
Debt Instrument, Periodic Payment, Total     $ 64,000 $ 44,000          
Interest Expense, Debt, Total         1,000 $ 2,000 4,000 $ 5,000  
Notes Payable, Current, Total         $ 0   $ 0   $ 379,000
Paycheck Protection Program CARES Act [Member]                  
Proceeds from Notes Payable, Total   $ 366,000              
Gain (Loss) on Extinguishment of Debt, Total $ 366,000