Fair Value Measurements - Financial Assets And Liabilities At Fair Value (Details) - USD ($) $ in Thousands	Apr. 30, 2026	Jan. 31, 2026
Assets
Proprietary inventory	$ 1,556	$ 1,500
Total financial assets at fair value	1,078,944	925,814
Liabilities
Warrant liabilities	1,956	1,993
Fractional shares repurchase obligation	689,011	514,877
Total financial liabilities at fair value	690,967	516,870
Level 1
Assets
Proprietary inventory	1,556	1,500
Total financial assets at fair value	1,078,944	925,814
Liabilities
Warrant liabilities	0	0
Fractional shares repurchase obligation	689,011	514,877
Total financial liabilities at fair value	689,011	514,877
Level 2
Assets
Proprietary inventory	0	0
Total financial assets at fair value	0	0
Liabilities
Warrant liabilities	0	0
Fractional shares repurchase obligation	0	0
Total financial liabilities at fair value	0	0
Level 3
Assets
Proprietary inventory	0	0
Total financial assets at fair value	0	0
Liabilities
Warrant liabilities	1,956	1,993
Fractional shares repurchase obligation	0	0
Total financial liabilities at fair value	1,956	1,993
Money Market Funds
Assets
Cash equivalents	385,777	406,837
Money Market Funds \| Level 1
Assets
Cash equivalents	385,777	406,837
Money Market Funds \| Level 2
Assets
Cash equivalents	0	0
Money Market Funds \| Level 3
Assets
Cash equivalents	0	0
Certificates of Deposit
Assets
Cash equivalents	2,600	2,600
Certificates of Deposit \| Level 1
Assets
Cash equivalents	2,600	2,600
Certificates of Deposit \| Level 2
Assets
Cash equivalents	0	0
Certificates of Deposit \| Level 3
Assets
Cash equivalents	0	0
Client-Held Fractional Shares
Assets
Cash equivalents	689,011	514,877
Client-Held Fractional Shares \| Level 1
Assets
Cash equivalents	689,011	514,877
Client-Held Fractional Shares \| Level 2
Assets
Cash equivalents	0	0
Client-Held Fractional Shares \| Level 3
Assets
Cash equivalents	$ 0	$ 0