Note 5 - Stockholders' Equity and Dilutive Equity Instruments (Tables)

3 Months Ended

Mar. 31, 2025

Notes Tables

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

(In Thousands)	Three Months Ended
	March 31, 2025		March 31, 2024
Balance at December 31, 2024 and 2023	$	6,060	$	5,266
Unrealized gain on note receivable		—		80
Pension benefits recognized in OCI		547		(137	)
Balance at March 31, 2025 and 2024	$	6,607	$	5,209

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, 2025		March 31, 2024
Common shares outstanding		50,852,297		52,759,223
New creditor warrants (strike price $0.001 per common share)		76,175		81,244
GulfMark creditor warrants (strike price $0.01 per common share)		72,984		88,887
Restricted stock units		347,362		582,908
Total		51,348,818		53,512,262