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Stockholders' Equity - Recognized Contractor and Employee Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Recognized Employee Expense [Line Items]
Stock or Unit Option Plan Expense	$ 917	$ 1,259	$ 2,839	$ 2,214
Contractor Option [Member]
Recognized Employee Expense [Line Items]
Stock or Unit Option Plan Expense		21	9	63
Options
Recognized Employee Expense [Line Items]
Stock or Unit Option Plan Expense	$ 917	$ 1,238	$ 2,830	$ 2,151

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- Definition

Amount of noncash expense for option under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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