Accounts Payable, Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Payables and Accruals [Abstract]
Accounts payable	$ 9,599	$ 8,025
Accrued employee compensation	20,622	19,029
Accrued capital expenditures	7,002	143
Accrued Knowledge Network application provider fees	5,561	2,508
Accrued professional services and associated costs	3,077	2,198
Accrued sales and use tax	1,185	2,206
Accrued employee stock purchase plan withholdings liability	3,277	2,635
Customer deposits	901	1,144
Other current liabilities	8,258	6,348
Total accounts payable, accrued expenses and other current liabilities	$ 59,482	$ 44,236