Leases - Schedule of Future Minimum Lease Payments for Operating and Finance Obligation (Detail) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
Remainder 2019	$ 80
2020	420
2021	221
2022	144
Thereafter	321
Total lease payments	1,186
Less: Interest	(164)
Present value of lease liabilities	1,022
Finance Lease Liabilities, Payments, Due [Abstract]
Remainder 2019	1,108
2020	3,879
2021	0
2022	0
Thereafter	0
Total lease payments	4,987
Less: Interest	(322)
Present value of lease liabilities	4,665
Lease liabilities [Abstract
Remainder 2019	1,188
2020	4,299
2021	221
2022	144
Thereafter	321
Total lease payments	6,173
Less: Interest	(486)
Total lease liabilities	$ 5,687

Lease Liabilities [Abstract]

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Lease Liability

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Lease, liability, payments, due.

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Lease Liability Payments Due After Year Five

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Lease liability payments due year four.

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Lease liability payments due year three.

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Lease liability payments due year two.

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Lease liability payments remainder of fiscal year.

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Lease, liability, undiscounted excess amount.

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

Reference 2: 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

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Amount of lessee's undiscounted obligation for lease payments for finance lease.

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

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

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

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

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Amount of lessee's undiscounted obligation for lease payments for finance lease, due in remainder of fiscal year following latest fiscal year ended.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-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 in excess of discounted obligation for lease payments for finance lease.

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

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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.

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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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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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-Name Accounting Standards Codification
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-SubTopic 20
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

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