Schedule II: Valuation and Qualifying Accounts (Details) - SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 74,870	$ 37,847	$ 14,058
Additions	40,969	37,023	23,789
Write-offs or Deductions	0	0	0
Balance at End of Year	$ 115,839	$ 74,870	$ 37,847