Summary of Significant Accounting Policies - Warrant Liabilities (Details)	Sep. 09, 2020 shares
Warrant Liabilities [Abstract]
Number of warrants issued per unit issued during IPO (in shares)	0.33

Number of redeemable warrants issued per unit issued during the Company's initial public offering.

No definition available.

Name:	qsi_NumberOfWarrantsIssuedPerUnitIssued
Namespace Prefix:	qsi_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant