Summary of Significant Accounting Policies - Schedule of Reorganization Items, net (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounting Policies [Abstract]
Professional fees	$ 104	$ (14)	$ (241)	$ (638)
Other	(137)	(452)	(443)	(1,114)
Reorganization items, net	$ (33)	$ (466)	$ (684)	$ (1,752)

Amount of expense (income) related to reorganization items classified as other.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56145-112766

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 45
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=116635682&loc=d3e55730-112764

Name:	us-gaap_DebtorReorganizationItemsOtherExpenseIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration