Convertible Note - Related Party - Summary of Convertible Notes (Detail) $ in Thousands	Sep. 30, 2023 USD ($)
Convertible Notes [Abstract]
Convertible note, principal	$ 100,000
Payment in-kind	12,952
Accrued interest	2,683
Discount on convertible note, net of accumulated amortization	(3,422)
Debt issuance costs, net of accumulated amortization	(125)
Convertible note	$ 112,088

Accrued interest.

No definition available.

Name:	aspn_AccruedInterest
Namespace Prefix:	aspn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Convertible debt principal amount.

+ References

No definition available.

+ Details

Name:	aspn_ConvertibleDebtPrincipalAmount
Namespace Prefix:	aspn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Convertible notes.

+ References

No definition available.

+ Details

Name:	aspn_ConvertibleNotesAbstract
Namespace Prefix:	aspn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Discount on Convertible Note Net of Accumulated Amortization

+ References

No definition available.

+ Details

Name:	aspn_DiscountOnConvertibleNoteNetOfAccumulatedAmortization
Namespace Prefix:	aspn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Payment in-kind.

+ References

No definition available.

+ Details

Name:	aspn_PaymentInKind
Namespace Prefix:	aspn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying amount of long-term convertible debt as of the balance sheet date, net of the amount due in the next twelve months or greater than the normal operating cycle, if longer. The debt is convertible into another form of financial instrument, typically the entity's common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_ConvertibleDebtNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-3

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant