Schedule II Allowance for bad debt (Tables)

12 Months Ended

Jan. 31, 2017

Valuation and Qualifying Accounts Disclosure [Line Items]

Summary of Valuation Allowance [Table Text Block]

	Balance at beginning of period	Charged to costs and expenses	Deductions from reserves (1)	Charged to other accounts (2)	Balance at end of period
Year Ended January 31, 2017
Allowance for possible losses in collection of trade receivables	$33	$246	$1	$27	$305
Year Ended January 31, 2016
Allowance for possible losses in collection of trade receivables	$31	$6	$4	$0	$33