Business and Summary of Significant Accounting Policies (Details)	12 Months Ended
	Jan. 31, 2017
Business and Summary of Significant Accounting Policies
Product Warranty Period	2 years
Capitalized software and development costs | Maximum
Business and Summary of Significant Accounting Policies
Finite-Lived Intangible Asset, Useful Life	10 years
Capitalized software and development costs | Minimum
Business and Summary of Significant Accounting Policies
Finite-Lived Intangible Asset, Useful Life	3 years