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Leases (Details) $ in Thousands	1 Months Ended	9 Months Ended
	May 31, 2020	Sep. 30, 2020 USD ($) ft²	Dec. 31, 2019 USD ($)	Jan. 01, 2019 USD ($)
Leases
Area of leased property (in square feet) | ft²		19,467
Operating lease, option to extend	true
Operating lease, extension term	3 years
Variable lease payments		$ 0
Residual value guarantee		0
Operating lease right-of-use assets		2,702	$ 2,938
Operating lease liability		$ 2,836
Lease, Practical Expedients, Package [true false]		true
ASU 2016-02
Leases
Operating lease right-of-use assets				$ 1,100
Operating lease liability				$ 1,100

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Area of a real estate property.

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- Definition

Indicates (true false) whether practical expedients are elected for not reassessing whether any expired or existing contract is or contains lease, lease classification for expired or existing lease, and initial direct cost for any existing lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 10
-Section 65
-Paragraph 1
-Subparagraph (j)
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No definition available.

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- Definition

Indicates (true false) whether lessee has option to extend operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

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- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
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Present value of lessee's discounted obligation for lease payments from operating lease.

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-Publisher FASB
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-SubTopic 20
-Section 45
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- Definition

Amount of lessee's right to use underlying asset under operating lease.

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- Definition

Amount of residual asset covered by residual value guarantee. Excludes guarantee considered to be lease payments for lessor.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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