XML 35 R41.htm IDEA: XBRL DOCUMENT v3.19.2
Note 10 - Financial Instruments - Fair Value of Company's Liabilities (Details) - Interest Rate Swap [Member]
Dec. 31, 2018
USD ($)
Interest rate swap contract, current portion $ 41,435
Fair Value, Inputs, Level 1 [Member]  
Interest rate swap contract, current portion
Fair Value, Inputs, Level 2 [Member]  
Interest rate swap contract, current portion 41,435
Fair Value, Inputs, Level 3 [Member]  
Interest rate swap contract, current portion