CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Interest expense, related party	$ 0	$ 645
Fair value adjustments on embedded debt derivative with related parties	$ 0	$ 575

Fair value adjustments on embedded debt derivative with related party.

No definition available.

Name:	snse_FairValueAdjustmentsOnEmbeddedDerivativeWithRelatedParty
Namespace Prefix:	snse_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration