Annual report pursuant to Section 13 and 15(d)

Note 6 - Revolving Line of Credit (Details Textual)

v3.20.1
Note 6 - Revolving Line of Credit (Details Textual) - Revolving Credit Facility [Member] - TD Bank [Member] - USD ($)
Dec. 20, 2005
Dec. 31, 2019
Dec. 31, 2018
Line of Credit Facility, Maximum Borrowing Capacity $ 1,000,000    
Line of Credit Facility, Current Borrowing Capacity   $ 446,000  
Line of Credit Facility, Interest Rate at Period End   4.76%  
Long-term Line of Credit, Total   $ 0 $ 0
London Interbank Offered Rate (LIBOR) Swap Rate [Member]      
Debt Instrument, Basis Spread on Variable Rate 3.00%