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Cover
Nov. 06, 2025
Document Type 8-K
Amendment Flag false
Document Period End Date Nov. 06, 2025
Entity File Number 001-36481
Entity Registrant Name ASPEN AEROGELS, INC.
Entity Central Index Key 0001145986
Entity Tax Identification Number 04-3559972
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 30 Forbes Road, Building B
Entity Address, City or Town Northborough
Entity Address, State or Province MA
Entity Address, Postal Zip Code 01532
City Area Code 508
Local Phone Number 691-1111
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock
Trading Symbol ASPN
Security Exchange Name NYSE
Entity Emerging Growth Company false