XML 103 R43.htm IDEA: XBRL DOCUMENT v3.20.1
Note 3 - Inventories - Summary of Inventories (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Inventory $ 1,889,164 $ 1,704,391
Lubricant [Member]    
Inventory 1,728,861 1,043,763
Victualing [Member]    
Inventory 160,303 79,965
Bunkers [Member]    
Inventory $ 580,663