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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Jan. 31, 2020
Jan. 31, 2019
Statement of Financial Position [Abstract]    
Allowance for accounts receivable $ 1,166 $ 2,098
Preferred stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Preferred stock, shares authorized (in shares) 100,000,000 100,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Class A Common Stock    
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares authorized (in shares) 1,000,000,000 1,000,000,000
Common stock, shares issued (in shares) 113,990,000 101,093,000
Common stock, shares outstanding (in shares) 101,093,000
Class B Common Stock    
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares authorized (in shares) 120,000,000 120,000,000
Common stock, shares issued (in shares) 8,648,000 11,059,000
Common stock, shares outstanding (in shares) 11,059,000