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Note 14 - Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

		Year Ended December 31,
		2021				2020				2019
		(in thousands, except per share data)
Numerator:
Net income		$	70,960			$	91,572			$	69,336
Denominator:
Basic weighted average shares			39,030				39,167				39,075
Effect of potentially dilutive shares:
Stock options			863				1,262				1,806
Restricted stock units			224				311				403
Employee stock purchase plan			1				—				—
Diluted weighted average shares		$	40,118			$	40,740			$	41,284
Net income per share:
Basic		$	1.82			$	2.34			$	1.77
Diluted		$	1.77			$	2.25			$	1.68

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

		Year Ended December 31,
		2021				2020				2019
		(in thousands)
Stock options			534				532				460
Restricted stock units			61				52				52
Total anti-dilutive shares			595				584				512

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

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