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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Note 1 - Description of Business and Summary of Significant Accounting Policies (Details Textual) $ in Thousands		3 Months Ended		6 Months Ended	12 Months Ended
	Mar. 09, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2021 shares	Dec. 31, 2021 USD ($) MWh	Dec. 31, 2020 USD ($)	Jan. 31, 2022 USD ($)
Number of Reportable Segments					3
Cash and Cash Equivalents, at Carrying Value, Ending Balance					$ 852	$ 3,372
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total					(2,520)	956
Debt and Lease Obligation, Total					11,368
Debt, Current, Total					8,710
Line of Credit, Current					6,350
Proceeds from Issuance of Common Stock, Net					9,314	232
Employee Retention Credit Benefit		$ 3,593	$ 3,372
Receivable, Uncollected Employee Retention Credit					497
Interest Income, Other					1	0
Depreciation, Total					$ 5,603	$ 5,546
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					71.00%	78.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Five Largest Customers [Member]
Concentration Risk, Percentage					25.00%	65.00%
Subsequent Event [Member]
Collected, Employee Retention Credit							$ 497
The ATM Agreement [Member]
Value of Shares Issuable, Maximum	$ 10,000
Stock Issued During Period, Shares, New Issues (in shares) \| shares				1,897,697
Proceeds from Issuance of Common Stock, Net	9,725
Payments of Stock Issuance Costs	275
Other Stock Issuance Expenses	$ 411
Revolving Credit Facility [Member]
Line of Credit Facility, Remaining Borrowing Capacity					$ 14,037
Maximum [Member]
Product Warranty Term (Year)					5 years
Minimum [Member]
Product Warranty Term (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	1
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