Note 6 - Stockholders' Equity and Dilutive Equity Instruments (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

(In Thousands)	Three Months Ended
	March 31, 2023			March 31, 2022
Balance at December 31, 2022 and 2021	$	8,576		$	2,668
Unrealized loss on note receivable		(132	)		—
Pension benefits recognized in OCI		(190	)		(197	)
Balance at March 31, 2023 and 2022	$	8,254		$	2,471

Schedule of Total Shares Outstanding Including Warrants and Restricted Stock Units [Table Text Block]

Total shares outstanding including warrants, restricted stock units and stock options	March 31, 2023		March 31, 2022
Common shares outstanding		50,780,847		41,716,885
New creditor warrants (strike price $0.001 per common share)		81,244		465,398
GulfMark creditor warrants (strike price $0.01 per common share)		107,877		429,812
Restricted stock units and stock options		1,637,393		1,736,037
Total		52,607,361		44,348,132