Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Statement of Cash Flows [Abstract]
Forfeiture of certain shares to satisfy exercise costs and the recipients' income tax obligations related to stock options exercised and restricted stock vested (in shares)	3,986	55,526
Forfeiture of certain shares to satisfy exercise costs and the recipients' income tax obligations related to stock options exercised and restricted stock vested	$ 119	$ 1,841

Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

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