Schedule II - Valuation and Qualifying Accounts (Details) - SEC Schedule, 12-09, Allowance, Credit Loss [Member] - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 739	$ 978	$ 691
Charged to Costs and Expenses	816	37	357
Charged to Other Accounts	0	0	0
Deductions From Reserves	175	276	70
Balance at End of Year	$ 1,380	$ 739	$ 978