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Note 2 - Summary of Significant Accounting Policies (Details Textual) € in Thousands, $ in Thousands | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2022 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2022 EUR (€) | Mar. 31, 2022 USD ($) | May 31, 2018 USD ($)
Restricted Cash, Total | $ 1,137 | $ 0 |  |  |
Number of Operating Segments | 3 | 2 |  |  |
Deferred Grant Proceeds | $ 217 |  |  |  |
City of Rochester and State of New York [Member] |  |  |  |  |
Contingent Liability, Repayment of State and Local Grant Funds Received |  |  |  | $ 87 | $ 550
Covenant, Future Amount Receivable | 285 |  |  |  |
Bank Guarantee on Customer Order Deposit [Member] |  |  |  |  |
Restricted Cash, Total | $ 1,137 |  | € 1,160 |  |

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- Definition Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=126999549&loc=SL98516268-108586 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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