Employee Benefit Plans | Employee Stock Purchase Plans (Details) - Employee Stock Purchase Plan [Member]	12 Months Ended
	Jan. 31, 2019 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock Shares Authorized Employee Stock Purchase Plan	1,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Rate, Purchase Price as Percentage of Market Price	85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Annual Fair Market Value Per Employee | $	$ 25,000
Employee Stock Purchase Plans, Aggregate Shares Issued	556,612
Employee Stock Purchase Plan, Holding Period For Shares Purchased	1 year