Stockholders' Equity - Warrants (Details) - USD ($) $ / shares in Units, $ in Millions	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Class of Warrant or Right [Line Items]
Exercise Price (usd per share)		$ 0.01	$ 0.01
Fair Value at Issuance	$ 0.0	$ 11.8
TriplePoint Equity-Classified Common Stock Warrants Issued Nov 2016
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	82,891	82,891
Exercise Price (usd per share)	$ 7.54	$ 7.54
Fair Value at Issuance	$ 0.3	$ 0.3
TriplePoint Equity-Classified Common Stock Warrants Issued Jun 2017
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	18,236	18,236
Exercise Price (usd per share)	$ 7.54	$ 7.54
Fair Value at Issuance	$ 0.1	$ 0.1
TriplePoint Equity-Classified Common Stock Warrants Issued Sep 2017
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	14,920	14,920
Exercise Price (usd per share)	$ 7.54	$ 7.54
Fair Value at Issuance	$ 0.1	$ 0.1
TriplePoint Equity-Classified Common Stock Warrants Issued Jan 2018
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	16,578	16,578
Exercise Price (usd per share)	$ 7.54	$ 7.54
Fair Value at Issuance	$ 0.1	$ 0.1
TriplePoint Equity-Classified Common Stock Warrants Issued Apr 2018
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	16,578	16,578
Exercise Price (usd per share)	$ 7.54	$ 7.54
Fair Value at Issuance	$ 0.1	$ 0.1
TriplePoint Equity-Classified Common Stock Warrants Issued Nov 2015
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	35,215
Exercise Price (usd per share)	$ 17.04
Fair Value at Issuance	$ 0.2
TriplePoint Equity-Classified Common Stock Warrants Issued Jun 2016
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	28,172
Exercise Price (usd per share)	$ 17.04
Fair Value at Issuance	$ 0.2
TriplePoint Equity-Classified Common Stock Warrants Issued Sep 2016
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	24,650
Exercise Price (usd per share)	$ 17.04
Fair Value at Issuance	$ 0.1
Double Helix Temasek Equity-Classified Common Stock Warrants One Issued Jul 2018
Class of Warrant or Right [Line Items]
Number of Shares (in shares)		730,000
Exercise Price (usd per share)		$ 0.01
Fair Value at Issuance		$ 9.0
Double Helix Temasek Equity-Classified Common Stock Warrants Two Issued Jul 2018
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	730,000	730,000
Exercise Price (usd per share)	$ 27.40	$ 27.40
Fair Value at Issuance	$ 1.3	$ 1.3
Double Helix Temasek Equity-Classified Common Stock Warrants Two Issued October 2021
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	394,343
Exercise Price (usd per share)	$ 21.00
Fair Value at Issuance	$ 5.3
Equity Classified Common Stock Warrants
Class of Warrant or Right [Line Items]
Number of Shares (in shares)	1,361,583	1,609,203
Fair Value at Issuance	$ 7.8	$ 11.0
TriplePoint Liability-Classified Preferred Stock Warrants Issued Nov 2015
Class of Warrant or Right [Line Items]
Number of Shares (in shares)		35,215
Exercise Price (usd per share)		$ 17.04
Fair Value at Issuance		$ 0.2
TriplePoint Liability-Classified Preferred Stock Warrants Issued Jun 2016
Class of Warrant or Right [Line Items]
Number of Shares (in shares)		28,172
Exercise Price (usd per share)		$ 17.04
Fair Value at Issuance		$ 0.2
TriplePoint Liability-Classified Preferred Stock Warrants Issued Sep 2016
Class of Warrant or Right [Line Items]
Number of Shares (in shares)		24,650
Exercise Price (usd per share)		$ 17.04
Fair Value at Issuance		$ 0.1
10 Jay Liability-Classified Preferred Stock Warrants Issued Oct 2020
Class of Warrant or Right [Line Items]
Number of Shares (in shares)		76,627
Exercise Price (usd per share)		$ 14.74
Fair Value at Issuance		$ 0.0
Ares Liability-Classified Common Stock Warrants Issued Oct 2020
Class of Warrant or Right [Line Items]
Number of Shares (in shares)		1,651,701
Exercise Price (usd per share)		$ 0.01
Fair Value at Issuance		$ 11.6
Liability-Classified Common Stock Warrants
Class of Warrant or Right [Line Items]
Number of Shares (in shares)		1,816,365
Fair Value at Issuance	$ 0.0	$ 12.1