Debt - Schedule of Future Principal Repayments of Long-Term Debt (Details) - Senior Notes - USD ($)	Jan. 31, 2019	Jan. 31, 2018
Debt Instrument [Line Items]
2019	$ 597,000
2020	3,433,000
Total repayments	4,030,000	$ 4,626,000
Deferred finance costs	$ 82,000	$ 128,000