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Note 8 - Long-term Debt (Details Textual) - USD ($) $ / shares in Units, $ in Thousands						12 Months Ended
	Feb. 02, 2023	Jan. 30, 2023	Jul. 02, 2021	Jul. 01, 2021	Jun. 29, 2021	Dec. 31, 2023	Dec. 31, 2022	Mar. 06, 2024
Debt Instrument, Unamortized Discount						$ 554	$ 1,198
Preferred Stock, Dividend Rate, Percentage						8.875%	8.875%
Warrants Issued to Lenders [Member]
Class of Warrant or Right, Issued During Period (in shares)			2
Warrants and Rights Outstanding						$ 1,900
A Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)			500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 17.38
Percentage of Closing Price Per Share of Common Stock			120.00%
B Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 21.72
Percentage of Closing Price Per Share of Common Stock			150.00%
Warrants and Rights Outstanding, Term (Day)			180 days
Series A Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage			8.875%	8.875%	8.875%	8.875%	8.875%
Subsequent Event [Member] | Heerema Credit Agreement [Member]
Debt Instrument, Face Amount								$ 20,000
Conversion Option on Debt [Member]
Derivative Liability	$ 2,400
Unrealized Gain (Loss) on Derivatives						$ (220)
Conversion Option on Debt [Member] | Reclassified to Additional Paid-in Capital [Member]
Derivative Liability						2,570
Senior Secured Debt Due June 30, 2026 [Member]
Long-Term Debt, Gross						$ 19,100
Debt Instrument, Interest Rate, Stated Percentage						7.00%	7.00%
New Loan [Member]
Debt Instrument, Face Amount			$ 50,000
Debt Instrument, Interest Rate, Stated Percentage	7.00%		7.00%
Repayments of Debt	$ 15,000	$ 15,000
Debt Instrument, Convertible, Maximum Amount	$ 15,000
Debt Instrument, Convertible, Conversion Price (in dollars per share)	$ 4.8
Debt Instrument, Principal Amount with Interest Paid in Cash	$ 20,000
Debt Instrument, Principal Amount with Interest Paid in Kind	15,000
Debt Instrument, Unamortized Discount	2,000
Debt Instrument, Convertible, Beneficial Conversion Feature	$ 980
New Loan [Member] | Repayment After Thirty-months of the Closing Date [Member]
Debt Instrument, Repayment Fee Percentage			6.00%
New Loan [Member] | Issuance After One Year of the Closing Date [Member]
Debt Instrument, Prepay Amount, Percentage of the Cash Proceeds Received			75.00%
Secured Nonconvertible Term Loans [Member] | Heerema Credit Agreement [Member]
Debt Instrument, Face Amount						$ 20,000
Secured Nonconvertible Term Loans [Member] | Subsequent Event [Member] | Heerema Credit Agreement [Member]
Debt Instrument, Face Amount								21,200
Convertible Loan Instrument Maturing June 30, 2027 [Member] | Subsequent Event [Member] | Heerema Credit Agreement [Member]
Debt Instrument, Face Amount								$ 16,000

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