Document and Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2021	Aug. 27, 2021	Dec. 31, 2020
Document and Entity Information
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2021
Entity File Number	001-39727
Entity Registrant Name	LIFESCI ACQUISITION II CORP.
Title of 12(b) Security	Shares of Common Stock, $0.0001 par value
Trading Symbol	LSAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Entity Public Float			$ 87,757,186
Entity Common Stock, Shares Outstanding		10,011,301
Entity Central Index Key	0001819113
Current Fiscal Year End Date	--06-30
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false