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Note 5 - Stockholders' Equity and Dilutive Equity Instruments - Dilutive Equity Instruments (Details) - shares	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Common stock, shares outstanding (in shares)	49,562,017	51,461,472	52,322,461
Total (in shares)	50,237,731		53,171,525
Restricted Stock Units and Stock Options [Member]
Common stock shares reserved (in shares)	600,759		695,576
New Creditor Warrants [Member]
Common stock shares reserved (in shares)	21,400		76,175
GulfMark Creditor Warrants [Member]
Common stock shares reserved (in shares)	53,555		77,313

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The number of shares outstanding and the aggregate number of common shares reserved for future issuance.

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