Credit limit percentage on prepayment balance.

No definition available.

Name:	aspn_CreditLimitPercentageOnPrepaymentBalance
Namespace Prefix:	aspn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility increased maximum borrowing capacity.

+ References

No definition available.

+ Details

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

- Definition

Non-interest bearing prepayment, remaining aggregate amount remitted.

+ References

No definition available.

+ Details

Name:	aspn_NonInterestBearingPrepaymentRemainingAggregateAmountRemitted
Namespace Prefix:	aspn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the conditions for borrowing under the credit facility including the nature of any restrictions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityCovenantTerms
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=aspn_SiliconValleyBankCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SupplyCommitmentAxis=aspn_SupplyAndJointDevelopmentAgreementAddendumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=aspn_BasfMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis=aspn_AfterJanuary12020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis=aspn_AfterDecember312022Member
Namespace Prefix:
Data Type:	na
Balance Type:
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Subsequent Events - Additional Information (Detail) - USD ($)			1 Months Ended	12 Months Ended
	Mar. 04, 2019	Jan. 14, 2019	Jan. 31, 2019	Dec. 31, 2018
Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Extended maturity date				Apr. 28, 2020
Silicon Valley Bank Credit Facility [Member] \| Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Interest rate description				The interest rate applicable to borrowings under the revolving credit facility may be based on the prime rate or LIBOR. Prime rate-based rates vary from prime rate plus 0.75% per annum to prime rate plus 2.00% per annum, while LIBOR-based rates vary from LIBOR plus 3.75% per annum to LIBOR plus 4.25% per annum.
Credit facility, covenant terms				The credit facility has also been amended to (i) revise the definition of “Borrowing Base” to remove the eligible inventory component of the Borrowing Base, (ii) remove the Adjusted Quick Ratio financial covenant set forth in the loan agreement and (iii) establish certain minimum Adjusted EBITDA levels with respect to the minimum Adjusted EBITDA financial covenant for the extended term.
Subsequent Event [Member] \| Silicon Valley Bank Credit Facility [Member] \| Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Extended maturity date	Apr. 28, 2020
Maximum increased borrowing amount	$ 20,000,000
Percentage of unused line fee	0.50%
Subsequent Event [Member] \| Prime Rate [Member] \| Silicon Valley Bank Credit Facility [Member] \| Minimum [Member] \| Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Additional interest rate per annum	0.75%
Subsequent Event [Member] \| Prime Rate [Member] \| Silicon Valley Bank Credit Facility [Member] \| Maximum [Member] \| Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Additional interest rate per annum	2.00%
Subsequent Event [Member] \| LIBOR Rate [Member] \| Silicon Valley Bank Credit Facility [Member] \| Minimum [Member] \| Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Additional interest rate per annum	3.75%
Subsequent Event [Member] \| LIBOR Rate [Member] \| Silicon Valley Bank Credit Facility [Member] \| Maximum [Member] \| Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Additional interest rate per annum	4.25%
Subsequent Event [Member] \| Supply and Joint Development Agreement Addendum [Member] \| BASF [Member]
Subsequent Event [Line Items]
Non-interest bearing prepayment, remaining aggregate amount remitted			$ 5,000,000
Subsequent Event [Member] \| Supply and Joint Development Agreement Addendum [Member] \| BASF [Member] \| After January 1, 2020 [Member]
Subsequent Event [Line Items]
Credit limit percentage on prepayment balance		50.00%
Subsequent Event [Member] \| Supply and Joint Development Agreement Addendum [Member] \| BASF [Member] \| After December 31, 2022 [Member]
Subsequent Event [Line Items]
Credit limit percentage on prepayment balance		24.70%