Note 6 - Credit Facility, Term Loans and Warrants (Details Textual) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended	9 Months Ended
	Oct. 04, 2022	Sep. 29, 2022	Mar. 01, 2022	Dec. 22, 2021	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Proceeds from Lines of Credit						$ 63,978	$ 107,678
Warrant Liability			$ 19,000			$ 1,100
Securities Purchase Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			4,827,242
Sale of Stock, Number of Shares Issued in Transaction (in shares)			6,436,322
Class of Warrant or Right, Sale Price (in dollars per share)			$ 2.9099
Proceeds from Issuance of Warrants			$ 27,500
September Purchase Agreements [Member] | Registered Direct Offering [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		10,643,034
Sale of Stock, Number of Shares Issued in Transaction (in shares)	10,643,034	10,643,034
Proceeds from Issuance or Sale of Equity	$ 20,200
Payments of Stock Issuance Costs					$ 12,800
September Purchase Agreements [Member] | Registered Direct Offering [Member] | Accredited Purchasers [Member]
Sale of Stock, Number of Shares Issued in Transaction (in shares)		10,526,368
September Purchase Agreements [Member] | Registered Direct Offering [Member] | Insiders [Member]
Sale of Stock, Number of Shares Issued in Transaction (in shares)		116,666
Terminated Notes [Member]
Debt Instrument, Face Amount				$ 110,000
Midcap Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				200,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)				$ 4.7
Warrants and Rights Outstanding, Term (Year)				10 years
Prefunded Warrants [Member] | Securities Purchase Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			3,013,850
Common Stock Warrants [Member] | Securities Purchase Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			2,260,388
Class of Warrant or Right, Sale Price (in dollars per share)			$ 2.91
Common Stock Warrants [Member] | September Purchase Agreements [Member] | Registered Direct Offering [Member] | Accredited Purchasers [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		10,526,368
Class of Warrant or Right, Sale Price (in dollars per share)		$ 1.9
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)		1
Common Stock Warrants [Member] | September Purchase Agreements [Member] | Registered Direct Offering [Member] | Insiders [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		116,666
Class of Warrant or Right, Sale Price (in dollars per share)		$ 2.1
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)		1
Line of Credit [Member] | Midcap Credit Facility [Member]
Debt Instrument, Term (Year)				3 years
Line of Credit Facility, Maximum Borrowing Capacity				$ 40,000
Proceeds from Lines of Credit				$ 27,600
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.50%
Line Of Credit Facility, Maximum Liquidity Requirements During Period				$ 12,500
Line Of Credit Facility, Maximum Liquidity Requirements At All Other Times				$ 15,000
Line of Credit [Member] | Midcap Credit Facility [Member] | Term Secured Overnight Financing Rate [Member]
Debt Instrument, Basis Spread on Variable Rate				0.10%
Line of Credit [Member] | Midcap Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate				5.50%