CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Oct. 31, 2017	Jan. 31, 2017
Current assets:
Allowance for doubtful accounts	$ 1,456	$ 958
Liabilities, Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit)
Redeemable convertible preferred stock outstanding (in shares)	0	41,148,282
Stockholders’ equity (deficit):
Treasury stock (in shares)	99,371	99,371
Redeemable Preferred Stock
Liabilities, Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit)
Redeemable convertible preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Redeemable convertible preferred stock authorized (in shares)	0	41,234,841
Redeemable convertible preferred stock issued (in shares)	0	41,148,282
Redeemable convertible preferred stock outstanding (in shares)	0	41,148,282
Aggregate liquidation preference	$ 0	$ 345,997
Class A Common Stock
Stockholders’ equity (deficit):
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock authorized (in shares)	1,000,000,000	162,500,000
Common stock issued (in shares)	9,325,098	0
Common stock outstanding (in shares)	9,325,098	0
Class B Common Stock
Stockholders’ equity (deficit):
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock authorized (in shares)	100,000,000	113,000,000
Common stock issued (in shares)	41,341,283	13,192,992
Common stock outstanding (in shares)	41,241,912	13,093,621