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Note 2 - Acquisitions (Details Textual) - USD ($) $ in Thousands |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2021 | Jan. 08, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Jan. 01, 2022
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  | $ (0) |  | $ 16,811 |  |
Goodwill, Ending Balance |  |  | 25,099 | $ 26,651 | 26,651 |  | $ 26,651
EOS Power Panama Inc. [Member] |  |  |  |  |  |  |
Revenues, Total |  |  |  |  |  | $ 12,000 |
rms Connectors, Inc. [Member] |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  | $ 9,000 |  |  |  |  |
Goodwill, Ending Balance |  | $ 0 |  |  |  |  |
EOS Power Panama Inc. [Member] |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total | $ 7,800 |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 2,160 |  |  | 2,200 | 2,200 |  |
Goodwill, Ending Balance | $ 2,499 |  |  |  |  |  |
EOS Power Panama Inc. [Member] | Customer Relationships [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  |  |  | 1,900 | $ 1,900 |  |
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year) |  |  |  |  | 16 years |  |
EOS Power Panama Inc. [Member] | Trade Names [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  |  |  | 300 | $ 300 |  |
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year) |  |  |  |  | 2 years |  |
The 2021 Acquisitions [Member] |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  | 0 |  | $ 500 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  |  | 2,160 |  |  |  |
Goodwill, Ending Balance |  |  | $ 2,499 |  |  |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  |  | 17,100 |  |  |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  |  |  | $ 1,900 |  |  |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 55 -Paragraph 24 -URI https://asc.fasb.org/extlink&oid=122137925&loc=d3e14258-109268 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(15)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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