Significant Accounting Policies - Property, Plant, and Equipment (Details) - USD ($)	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Property, Plant and Equipment
Depreciation expense	$ 774,074	$ 1,099,957
Computer equipment and software | Minimum
Property, Plant and Equipment
Property, plant and equipment, useful life	3 years
Computer equipment and software | Maximum
Property, Plant and Equipment
Property, plant and equipment, useful life	4 years
Office equipment
Property, Plant and Equipment
Property, plant and equipment, useful life	5 years
Office furniture and fixtures
Property, Plant and Equipment
Property, plant and equipment, useful life	7 years