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Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
	Dec. 27, 2023	Jan. 31, 2025 USD ($)	Dec. 31, 2024 USD ($) $ / shares	Dec. 31, 2023 USD ($) $ / shares	Jul. 31, 2024 USD ($)	Dec. 31, 2022 USD ($)
Cash, Cash Equivalents, and Short-Term Investments			$ 22,278
Retained Earnings (Accumulated Deficit)			(373,095)	$ (337,635)
Net Income (Loss) Attributable to Parent			(35,460)	(87,126)
Net Cash Provided by (Used in) Operating Activities			(26,620)	$ (50,725)
Proceeds From Financing Activities, Gross			$ 12,905
Common Stock, Par or Stated Value Per Share (in dollars per share) \| $ / shares			$ 0.0001	$ 0.0001
Restricted Cash and Cash Equivalents			$ 0	$ 2,150
Accounts Receivable, Allowance for Credit Loss, Writeoff			70	0
Accounts Receivable, Allowance for Credit Loss			0	35
Inventory Valuation Reserves			4,659	5,062
Impairment, Long-Lived Asset, Held-for-Use			$ 0	9,988
Number of Finance Leases			0
Contract with Customer, Asset, after Allowance for Credit Loss			$ 0
Contract with Customer, Liability			0	0		$ 987
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued			0	$ 0
Convertible Note 2022 [Member]
Convertible Debt			$ 0
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)			2 years
Product Warranty Obligation, Term (Day)			30 days
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)			7 years
Product Warranty Obligation, Term (Day)			1 year
Customer Concentration Risk [Member] \| Accounts Receivable [Member]
Number of Customers			3	4
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer One [Member]
Concentration Risk, Percentage			10.00%	10.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer Two [Member]
Concentration Risk, Percentage			10.00%	10.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer Three [Member]
Concentration Risk, Percentage			10.00%	10.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer Four [Member]
Concentration Risk, Percentage				10.00%
Supplier Concentration Risk [Member] \| Accounts Payable [Member]
Number of Vendors			1	1
Supplier Concentration Risk [Member] \| Accounts Payable [Member] \| One Vendor [Member]
Concentration Risk, Percentage			10.00%	10.00%
Citibank N.A. [Member] \| Letter of Credit [Member] \| Collateral Pledged [Member]
Long-Term Debt				$ 2,150	$ 2,150
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	30
Subsequent Event [Member]
Proceeds From Financing Activities, Gross		$ 11,055