XML 38 R28.htm IDEA: XBRL DOCUMENT v3.20.2
Note 5 - Debt (Details Textual) - USD ($)
Mar. 25, 2019
Sep. 11, 2018
Jun. 30, 2020
Apr. 20, 2020
Dec. 31, 2019
Jan. 31, 2019
Line of Credit, Current     $ 500,000   $ 500,000  
Paycheck Protection Program CARES Act [Member]            
Debt Instrument, Face Amount       $ 862,000    
Revolving Credit Facility [Member]            
Line of Credit Facility, Maximum Borrowing Capacity $ 750,000 $ 750,000        
Line of Credit, Current     $ 500,000     $ 500,000
Debt Instrument, Interest Rate, Stated Percentage     3.18%      
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Basis Spread on Variable Rate 3.00% 2.25%