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Commitments and Contingencies - Leases (Details) ft² in Thousands, $ in Thousands | Aug. 28, 2020 USD ($) | Sep. 30, 2020 USD ($) ft² | Dec. 31, 2019 USD ($)
--- | --- | --- | ---
Commitments and Contingencies |  |  |
Tenant improvements |  | $ 11,539 |
Operating Lease, Right-of-Use Asset |  | 15,987 | $ 3,133
Operating Lease, Liability |  | $ 21,440 |
Heights Union |  |  |
Commitments and Contingencies |  |  |
Area of lease property | ft² |  | 75 |
Operating lease, lessor allowance |  | $ 5,250 |
Tenant improvements |  | 11,450 |
Incentive from Lessor |  | $ 5,250 |
Operating lease, incremental borrowing rate | 10.60% |  |
Operating Lease, Right-of-Use Asset | $ 13,323 |  |
Operating Lease, Liability | $ 18,573 |  |

X
- Definition Area of property subject to lease. + References No definition available. + Details
Name: | axgn_AreaOfLeaseProperty
Namespace Prefix: | axgn_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the incremental borrowing rate under the operating leases. + References No definition available. + Details
Name: | axgn_OperatingLeaseIncrementalBorrowingRate
Namespace Prefix: | axgn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of lessor allowance to be used towards the hard and soft costs of tenant improvements under the operating leases. + References No definition available. + Details
Name: | axgn_OperatingLeaseLessorAllowance
Namespace Prefix: | axgn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the deferred credit for an incentive or inducement received by a lessee from a lessor, in order to motivate the lessee to enter the lease agreement, which incentive or inducement is to be recognized as a reduction of rental expense over the lease term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 55 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=77891322&loc=d3e41620-112719 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e40010-112707 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of improvements having a life longer than one year that were made for the benefit of one or more tenants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |