Prepaid Expenses, Other Current Assets and Other Noncurrent Assets (Additional Information) (Details) $ in Millions	Dec. 31, 2025 USD ($)
Prepaid Expense and Other Assets, Noncurrent [Abstract]
Deposit transferred to a payment processor to pay out investigator site fees	$ 0.2

Deposit Transferred to Payout Investigator Site Fees

No definition available.

Name:	qttb_DepositTransferredToPayoutInvestigatorSiteFees
Namespace Prefix:	qttb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant