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Note 6 - Earnings (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

		Three months ended June 30,								Six months ended June 30,
​		2022				2021				2022				2021
Numerator:		​				​				​				​
Net loss		$	(14,456	)		$	(8,203	)		$	(30,518	)		$	(23,825	)
Denominator:		​				​				​				​
Weighted average shares used to compute net loss per share		​				​				​				​
Basic			27,612				26,850				27,537				26,637
Diluted			27,612				26,850				27,537				26,637
Net loss per share		​				​				​				​
Basic		$	(0.52	)		$	(0.31	)		$	(1.11	)		$	(0.89	)
Diluted		$	(0.52	)		$	(0.31	)		$	(1.11	)		$	(0.89	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

		Three months ended June 30,								Six months ended June 30,
​		2022				2021				2022				2021
Employee stock options			__				4				__				8
Restricted stock units			__				9				__				14
Shares for convertible senior notes			4,587				4,587				4,587				4,587
Total antidilutive shares			4,587				4,600				4,587				4,609

X

- 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 https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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X

- 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 https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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