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Leases - Summary of Maturities of Lease Liabilities (Detail) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Operating Lease Liabilities [Abstract]
Remainder of 2019	$ 1,239,000
2020	3,442,000
2021	2,537,000
2022	1,947,000
2023	1,026,000
Thereafter	1,932,000
Total lease payments	12,123,000
Less:
Imputed interest	(1,855,000)
Total operating lease liabilities	$ 10,268,000	$ 0

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- Definition

Operating lease liabilities.

+ References

No definition available.

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Amount of lessee's undiscounted obligation for lease payments for 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 6
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth fiscal year following latest fiscal year.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fifth fiscal year following latest fiscal year.

+ References

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year.

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease having an initial or remaining lease term in excess of one year due in remainder of fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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