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Note 9 - Stock-based Compensation and Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Schedule Of Common Stock Shares Reserved For Issuance And Shares Available For Grant [Table Text Block]

		Year Ended December 31,
		2021				2020				2019
Shares of common stock reserved for issuance under the plans			6,473,228				3,973,228				3,973,228
Shares of common stock available for future grants			3,037,187				1,591,577				2,187,101

Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

		Weighted-average				Time				Weight-average
		Grant-Date				Based				Grant Date				Performance
		Fair Value				Units				Fair Value				Based Units
Non-vested balance at December 31, 2018		$	24.21				1,081,084			$	26.04				63,365
Granted			23.44				186,143				24.50				101,143
Vested			24.45				(784,868	)			—				—
Cancelled/forfeited			24.70				(78,591	)			24.50				(70,694	)
Non-vested balance at December 31, 2019		$	23.32				403,768			$	25.54				93,814
Granted			5.95				594,234				—				—
Vested			24.05				(265,919	)			26.04				(63,365	)
Non-vested balance at December 31, 2020		$	8.95				732,083			$	24.50				30,449
Granted			13.26				452,403				—				—
Vested			10.97				(406,604	)			—				—
Cancelled/forfeited			24.50				(1,769	)			—				—
Non-vested balance at December 31, 2021		$	10.37				776,113			$	24.50				30,449

Schedule Of Allocated Share Based Compensation Expense Recognized Period Costs [Table Text Block]

(In Thousands)		Year Ended December 31,
		2021				2020				2019
Grant date fair value of restricted stock units vested		$	4,460			$	6,395			$	19,193
Restricted stock unit compensation expense			5,638				5,117				19,603

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

		Weighted-								Weighted-								Weighted-
		average				Time				average								average
		Grant-Date				Based				Grant-Date				Series A				Grant-Date				Series B
		Fair Value				Shares				Fair Value				Warrants				Fair Value				Warrants
Non-vested balance at December 31, 2018		$	226.50				4,517			$	1.00				7,650			$	2.94				8,269
Vested			226.50				(4,517	)			1.00				(7,650	)			2.94				(8,269	)
Non-vested balance at December 31, 2019		$	—				—			$	—				—			$	—				—

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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