Cover Page - shares	6 Months Ended
	Dec. 31, 2020	Feb. 16, 2021
Document Information [Line Items]
Document Type	10-Q/A
Amendment Flag	true
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Entity Registrant Name	NORTHERN STAR ACQUISITION CORP.
Entity Central Index Key	0001819574
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Current Reporting Status	Yes
Entity Shell Company	true
Entity File Number	001-39691
Entity Tax Identification Number	85-1872418
Entity Address, Address Line One	c/o Graubard Miller
Entity Address, Address Line Two	The Chrysler Business
Entity Address, Address Line Three	405 Lexington Avenue
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10174
City Area Code	212
Local Phone Number	818-8800
Entity Interactive Data Current	Yes
Document Quarterly Report	true
Document Transition Report	false
Amendment Description	Northern Star Acquisition Corp. (the “Company”) is filing this Amendment No. 2 on Form 10-Q/A (the “Amendment”) to amend and restate certain items in its Quarterly Report on Form 10-Q for the quarter ended December 31, 2020, originally filed with the U.S. Securities and Exchange Commission (the “SEC”) on February 16, 2021 (the “Original 10-Q”) and subsequently amended and restated on May 3, 2021.
Common Class A [Member]
Document Information [Line Items]
Trading Symbol	STIC
Entity Common Stock, Shares Outstanding		25,435,000
Title of 12(b) Security	Class A Common Stock, par value $0.0001 per share
Security Exchange Name	NYSE
Common Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		6,358,750
Capital Units [Member]
Document Information [Line Items]
Trading Symbol	STIC.U
Title of 12(b) Security	Units, each consisting of one share of Class A Common Stock and one-third of one redeemable warrant
Security Exchange Name	NYSE
Warrant [Member]
Document Information [Line Items]
Trading Symbol	STIC WS
Title of 12(b) Security	Redeemable warrants, exercisable for shares of Class A Common Stock at an exercise price of $11.50 per share
Security Exchange Name	NYSE