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

9 Months Ended

Sep. 30, 2021

Notes Tables

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

	Three Months Ended
(In thousands)	September 30, 2021			September 30, 2020
Balance at June 30, 2021 and 2020	$	(1,082	)	$	581
Pension benefits recognized in OCI		(207	)		525
Balance at September 30, 2021 and 2020	$	(1,289	)	$	1,106

	Nine Months Ended
(In thousands)	September 30, 2021			September 30, 2020
Balance at December 31, 2020 and 2019	$	(804	)	$	(236	)
Pension benefits recognized in OCI		(485	)		1,342
Balance at September 30, 2021 and 2020	$	(1,289	)	$	1,106

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	September 30, 2021		September 30, 2020
Common shares outstanding		41,277,377		40,460,982
New creditor warrants (strike price $0.001 per common share)		635,663		761,395
GulfMark creditor warrants (strike price $0.01 per common share)		565,155		930,027
Restricted stock units and stock options		1,447,957		797,330
Total		43,926,152		42,949,734