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ATM value of common stock available for issuance.

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Represents the aggregate power-generating capacity of turbines in the Entity.

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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ / shares in Units, $ in Thousands			1 Months Ended	12 Months Ended
	Jul. 31, 2018 USD ($) $ / shares	Oct. 26, 2016 USD ($)	Oct. 31, 2016 USD ($)	Dec. 31, 2018 USD ($) segment $ / shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares MW	Dec. 31, 2018 USD ($) facility $ / shares	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2018 USD ($) item $ / shares	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($) $ / shares	Feb. 25, 2019 USD ($)	Mar. 31, 2017 USD ($)
Description of Business
Number of reportable segments \| segment				3
Liquidity
Cash and cash equivalents and short-term investments				$ 1,177	$ 1,177	$ 1,177	$ 1,177	$ 1,177	$ 1,177	$ 1,177
Increase (decrease) in Cash and cash equivalents and Short-term investments											$ 1,099
Current borrowing capacity				10,319	10,319	10,319	10,319	10,319	10,319	10,319
Outstanding indebtedness under the Credit Facility				11,000	11,000	11,000	11,000	11,000	11,000	11,000	10,733
Long-term Debt, Current Maturities											114
Inventories, net				22,670	22,670	22,670	22,670	22,670	22,670	22,670	19,279
Increase (Decrease) in inventories										2,944	$ (7,057)
Total debt and capital lease obligations				14,876	14,876	14,876	14,876	14,876	14,876	14,876
Long-term Debt and Capital Lease Obligations, Repayments of Principal in Next Twelve Months				$ 12,897	$ 12,897	$ 12,897	$ 12,897	$ 12,897	$ 12,897	$ 12,897
Common stock, par value (in dollars per share) \| $ / shares	$ 0.001			$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001	$ 0.001
Proceeds from issuance of stock										$ 33
Sales agent commission percentage								3.00%
Sale of common stock, net of expenses (shares) \| shares					15,112
Commission paid to agent										1
ATM common stock available for issuance				$ 9,967	$ 9,967	$ 9,967	$ 9,967	$ 9,967	$ 9,967	9,967
NMTC note payable				13,338	13,338	13,338	13,338	13,338	13,338	13,338
Cash and Cash Equivalents and Short-Term Investments
Cash and cash equivalents				$ 1,177	$ 1,177	$ 1,177	$ 1,177	$ 1,177	$ 1,177	1,177	$ 78
Interest income										$ 5	$ 5
Credit facility
Liquidity
Maximum borrowing capacity		$ 20,000	$ 10,000									$ 35,000	$ 25,000
Maximum borrowing capacity of the face value of eligible A/R (as a percent)		85.00%	85.00%
Maximum percentage of book value of inventories that may be financed			50.00%	50.00%	50.00%	50.00%	50.00%	50.00%	50.00%	50.00%
Long-term Line of Credit				$ 11,000	$ 11,000	$ 11,000	$ 11,000	$ 11,000	$ 11,000	$ 11,000
Current borrowing capacity				10,319	10,319	10,319	10,319	10,319	10,319	10,319
Outstanding indebtedness under the Credit Facility				0	0	$ 0	$ 0	0	$ 0	0
Maximum borrowing capacity of the face value of machinery, equipment and property that may be financed		50.00%	50.00%
Towers and Heavy Fabrications
Description of Business
Number of facilities \| facility							2
Number of tower sections							1,650		1,650
New Markets Tax Credit Transaction
Principles of Consolidation and Basis of Presentation
Number of VIE's \| item									2
Minimum \| Towers and Heavy Fabrications
Description of Business
Power generating capacity of turbines that towers produced annually can support (in megawatts) \| MW						1,100
Maximum
Liquidity
Proceeds from issuance of stock	$ 10,000
Maximum \| Credit facility
Liquidity
Maximum borrowing capacity				$ 10,000	$ 10,000	$ 10,000	$ 10,000	$ 10,000	$ 10,000	$ 10,000
Maximum \| Towers and Heavy Fabrications
Description of Business
Annual tower production capacity (in towers) \| item									550