Note 5 - Other Assets - Schedule of Other Assets, Net (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Other Assets, Unclassified [Abstract]
Other receivables, net of allowance	$ 0	$ 75

Amount of allowance for credit loss on receivable, classified as other and current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(a)(4))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_AllowanceForDoubtfulOtherReceivablesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant