Recent Transactions - Equity Transactions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Payments of equity distributions, common stock	$ 700	$ 667	$ 5,827
Dividend Paid [Member]
Amount Per Share	$ 0.025

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration