Fair Value Measurements of Financial Assets and Liabilities on Recurring and Non Recurring Basis (Detail) $ in Thousands	Dec. 31, 2019 USD ($)
Assets:
Impaired long-lived assets	$ 34,421
Total fair value	34,549
Pic Onyx Inc
Assets:
Investment in PicOnyx	128
Fair Value, Inputs, Level 3
Assets:
Impaired long-lived assets	34,421
Total fair value	34,549
Fair Value, Inputs, Level 3 \| Pic Onyx Inc
Assets:
Investment in PicOnyx	$ 128

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant