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Nature and extent of risk arising from financial instruments (Details Narrative)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [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 $10.    
Credit Facility - Liquid [Member]      
Statement Line Items [Line Items]      
LIBOR floor 1.50%    
LIBOR 1.74% 2.50% 1.56%
Credit Facility - Other [Member]      
Statement Line Items [Line Items]      
LIBOR floor 2.00%   2.00%
LIBOR [Member]      
Statement Line Items [Line Items]      
Description for impact of change in LIBOR A 50 basis point increase in LIBOR would increase annual credit facility interest expense by $464.