Note 1 - Description of Business and Summary of Significant Accounting Policies (Details Textual) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
	Sep. 12, 2022 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) MWh $ / shares	Dec. 31, 2022 USD ($) $ / shares	Dec. 31, 2021	Jan. 31, 2023 USD ($)
Number of Reportable Segments		3
Cash and Cash Equivalents, at Carrying Value		$ 1,099	$ 12,732
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect		(11,633)	11,880
Accounts Receivable, Sale		40,343	93,245
Accounts Receivable, Sale, Discount Fees		858	$ 1,431
Debt and Lease Obligation		17,678
Debt, Current		$ 8,056
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares		$ 0.001	$ 0.001
Proceeds from Issuance of Common Stock, Net		$ 0	$ 230
Interest Income, Other		8	0
Depreciation, Total		$ 5,719	$ 5,335
Customer Concentration Risk [Member]
Number of Major Customers		5	5
Customer Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member] | Five Largest Customers [Member]
Concentration Risk, Percentage		65.00%	69.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Five Largest Customers [Member]
Concentration Risk, Percentage		27.00%	43.00%
Long-Term Contract with Customer [Member]
Contract with Customer, Asset, before Allowance for Credit Loss					$ 175,000
The Sales Agreement [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares	$ 1.000
Sales Agent Commission Percentage	2.75%
Stock Issued During Period, Shares, New Issues (in shares) | shares	100,379
Proceeds from Issuance of Common Stock, Net	$ 323
Payments of Stock Issuance Costs	9
Other Stock Issuance Expenses	93
Sale of Stock, Common Stock Available for Issuance, Value		$ 11,667
Senior Secured Term Loan [Member]
Line of Credit, Current		6,135
Revolving Credit Facility [Member]
Line of Credit Facility, Remaining Borrowing Capacity		21,714
Line of Credit, Current		$ 4,657
Maximum [Member]
Product Warranty Term (Year)		5 years		5 years
Maximum [Member] | The Sales Agreement [Member]
Value of Shares Issuable, Maximum	$ 12,000
Minimum [Member]
Product Warranty Term (Year)		1 year		1 year
Heavy Fabrications [Member]
Number of Facilities		2
Number of Tower Sections in Production Capacity of Turbines Total		1,650
Heavy Fabrications [Member] | Customer Concentration Risk [Member]
Number of Major Customers			2
Heavy Fabrications [Member] | Maximum [Member]
Annual Tower Production Capacity		550
Heavy Fabrications [Member] | Minimum [Member]
Power Generating Capacity of Turbines (Megawatt-Hour) | MWh		1,100