Stockholders’ Equity (Deficit) (Details)	12 Months Ended
	Jan. 31, 2020 $ / shares shares	Jan. 31, 2020 shares $ / shares	Jan. 31, 2020 $ / shares shares	Jan. 31, 2020 vote $ / shares shares	Jan. 31, 2020 class_of_stock $ / shares shares	Jan. 31, 2019 $ / shares shares
Class of Stock [Line Items]
Number of class of common stock | class_of_stock					2
Class A Common Stock
Class of Stock [Line Items]
Number of votes		1		1
Common stock authorized (in shares)	1,000,000,000	1,000,000,000	1,000,000,000	1,000,000,000	1,000,000,000	1,000,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001
Common stock issued (in shares)	48,512,090	48,512,090	48,512,090	48,512,090	48,512,090	13,303,028
Common stock outstanding (in shares)	48,512,090	48,512,090	48,512,090	48,512,090	48,512,090	13,303,028
Class B Common Stock
Class of Stock [Line Items]
Number of votes		10		10
Period of automatic conversion after death of founder	9 months
Percent of outstanding stock			10.00%
Common stock authorized (in shares)	100,000,000	100,000,000	100,000,000	100,000,000	100,000,000	113,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001
Common stock issued (in shares)	8,969,824	8,969,824	8,969,824	8,969,824	8,969,824	37,371,914
Common stock outstanding (in shares)	8,870,453	8,870,453	8,870,453	8,870,453	8,870,453	37,272,543