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Long-Term Debt - Titan Revolving Credit Facility (Details) - Titan Revolving Credit Facility
$ in Millions
Apr. 30, 2019
USD ($)
Jun. 01, 2018
CAD ($)
Jun. 01, 2018
USD ($)
Debt Instrument [Line Items]      
Maximum amount under the facility   $ 30.0 $ 22,300,000
Amount outstanding $ 0    
Available borrowings under the facility $ 22,300,000