Schedule II (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Valuation and Qualifying Accounts Disclosure [Line Items]
Allowance for Doubtful Accounts Receivable	$ 305	$ 33	$ 31
Provision for Doubtful Accounts	246	6
Allowance for Doubtful Accounts Receivable, Charge-offs	1	4
Valuation Allowances and Reserves, Charged to Other Accounts	$ 27	$ 0