Note 6 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Sep. 02, 2022	Jun. 30, 2022
Preferred Stock, Shares Authorized (in shares)	10,000,000		10,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001		$ 0.001
Common Stock, Shares Authorized (in shares)	175,000,000		175,000,000		175,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001		$ 0.001		$ 0.001
Proceeds from Issuance of Common Stock			$ 46,297	$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)	4,697,029		4,697,029		5,135,685
Share-Based Payment Arrangement, Expense	$ 9,200	$ 7,000	$ 28,500	$ 8,100
Warrants to Purchase Common Stock, Loan agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	147,058		147,058
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 4.08		$ 4.08
Warrants to Purchase Common Stock, Amended Loan Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	115,042		115,042
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 17.95		$ 17.95
Warrants to Purchase Common Stock, First Amendment [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	50,172		50,172
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 14.7		$ 14.7
Stock-based Compensation Expense Capitalized Into Inventory [Member]
Share-Based Payment Arrangement, Expense	$ 800		$ 2,100
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)	9,954,576		9,954,576		8,732,286
The 2022 Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)							17,000,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)	2,272,500		2,272,500
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)	8,742,674		8,742,674
The 2022 Incentive Plan [Member] | Full Value Awards [Member] | Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)							10,000,000
The 2022 Incentive Plan [Member] | Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)	4,856,672		4,856,672
The 2012 Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)	5,097,904		5,097,904
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)	2,424,529		2,424,529
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)	0		0
The 2022 ATM [Member]
Common Stock, Commission Rate						3.00%
Stock Issued During Period, Shares, New Issues (in shares)			1,385,700
Proceeds from Issuance of Common Stock			$ 47,100
Share Price (in dollars per share)	$ 34.01		$ 34.01
Proceeds from Issuance of Common Stock, Net			$ 46,300