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Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Schedule of Calculation of Basic and Diluted Earnings per Share

The calculation of basic and diluted earnings per share was as follows (in thousands, except share and per share data):

			Year Ended December 31,
			2021						2020						2019
Net loss attributable to common stockholders			$	(52,368)					$	(114,119)					$	(40,486)
Weighted-average common shares outstanding			103,246,308						96,111,547						78,322,496
Basic and diluted net loss per share			$	(0.51)					$	(1.19)					$	(0.52)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following is a summary of outstanding anti-dilutive potential common stock that was excluded from diluted net loss per share attributable to stockholders in the following periods:

			Year Ended December 31,
(in thousands)			2021						2020						2019
Convertible notes			14,341						14,784						22,314
Warrants			2,500						2,500						2,838
Non-qualified stock options			8,086						8,480						9,027
Restricted stock units			1,248						417						414
Employee Stock Purchase Plan			144						25						98
Rights agreement			—						—						198

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- References

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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