Note 3 - Long-term Debt (Details Textual) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended				6 Months Ended	12 Months Ended
	Feb. 02, 2023	Jul. 02, 2021	Jul. 01, 2021	Jun. 29, 2021	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Dec. 31, 2022
Derivative Liability					$ 2,570				$ 2,570	$ 0
Preferred Stock, Dividend Rate, Percentage					8.875%	8.875%	8.875%	8.875%
Warrants Issued to Lenders [Member]
Class of Warrant or Right, Issued During Period (in shares)		2
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%
Depository Shares [Member]
Preferred Stock, Liquidation Preference Per Share (in dollars per share)		$ 25.00	$ 25.00
Conversion Option on Debt [Member]
Derivative Liability	$ 2,400
Unrealized Gain (Loss) on Derivatives					$ (350)				$ (220)
New Loan [Member]
Debt Instrument, Face Amount		$ 50,000
Repayments of Debt	15,000
Debt Instrument, Convertible, Maximum Amount	$ 15,000
Debt Instrument, Convertible, Conversion Price (in dollars per share)	$ 4.80
Debt Instrument, Interest Rate, Stated Percentage	7.00%
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
Debt Instrument, Convertible, Beneficial Conversion Feature	$ 980,000
New Loan [Member] | Repayment After Eighteen-months of the Closing Date [Member]
Debt Instrument, Repayment Fee Percentage		4.00%
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%
New Loan [Member] | After 24-months Anniversary of the Closing of the Debt [Member]
Debt Instrument, Percentage of Principal Exchanged into Depositary Receipts		100.00%