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Financial Instruments
3 Months Ended
Mar. 31, 2019
Investments, All Other Investments [Abstract]  
Financial Instruments Disclosure [Text Block]
12.
Financial Instruments
 
At March 31, 2019, the Company had foreign exchange contracts outstanding to sell $3.0 million Canadian dollars at a price of approximately $2.3 million U.S. dollars. Based on quarter-end exchange rates, there were no significant unrealized gains or losses on the outstanding contracts.
 
The Company determines the fair value of foreign exchange contracts based on the difference between the foreign currency contract rates and the widely available foreign currency rates as of the measurement date. The fair value measurements are based on observable market transactions, and thus represent a level 2 valuation as defined by ASC 820.