Debt - Additional Information (Detail) - Aspen Aerogels Rhode Island, LLC [Member] - Paycheck Protection Program Loan [Member] - USD ($)		6 Months Ended
	May 01, 2020	Jun. 30, 2020
Debt Disclosure [Line Items]
Debt instrument, principal amount	$ 3,685,800
Debt instrument, interest rate	1.00%
Debt instrument, maturity term	2 years
Debt instrument, maturity description		The PPP Loan carries an interest rate of 1% per year and matures two years from the date of the Note. The PPP Loan indebtedness may be forgiven in whole or in part upon application by the Borrower to the PPP Investor. The PPP Investor will determine to what extent the PPP Loan is eligible for forgiveness, subject to SBA guidelines and other regulations, based on the use of loan proceeds for payroll costs, payment of interest on covered mortgage obligations, rent and utility costs over either an eight-week or 24-week period, at the Borrower’s option, following the Borrower’s receipt of the loan proceeds. Upon the Borrower’s application for forgiveness, the SBA will review the Borrower’s eligibility, use of proceeds and other certifications in connection with the application for the PPP Loan. Upon such review, the SBA may approve or deny the Borrower’s loan forgiveness application, in whole or part. As of June 30, 2020, the Borrower had not applied for forgiveness. If the Borrower has not applied for forgiveness within ten months from the end of the 24-week period following receipt of the loan proceeds, the Borrower shall then be required make payments of principal and accrued interest in equal monthly installments over the remaining term of the loan. In addition, the Flexibility Act permits the Borrower and the PPP Investor to mutually agree to extend the term of the PPP Loan to five years from the date of the Note. The Borrower may repay the PPP Loan at any time without penalty.