Condensed Consolidated Statements of Cash Flows (Parenthetical) $ in Millions	9 Months Ended
Sep. 30, 2020 USD ($)
Statement of Cash Flows [Abstract]
Commissions	$ 4.6

Commission Fees For Issuance Of Common Stock And Pre-Funded Warrants

No definition available.

Name:	nltx_CommissionFeesForIssuanceOfCommonStockAndPreFundedWarrants
Namespace Prefix:	nltx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration