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Nature and extent of risk arising from financial instruments (Details Narrative)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Financial Instruments [Line Items]    
Description for effect on foreign exchange rates A 5% increase or decrease in the U.S. dollar exchange rate would increase or decrease the unrealized exchange gain (loss) by $75.  
LIBOR [Member]    
Disclosure Of Financial Instruments [Line Items]    
Description for impact of change in LIBOR A 50-basis point change in LIBOR would not increase or decrease credit facility interest expense  
Credit Facility - Liquid [Member]    
Disclosure Of Financial Instruments [Line Items]    
LIBOR floor 1.50%  
LIBOR 0.34% 1.74%