Note 2 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2022 USD ($)	Dec. 31, 2021	Mar. 31, 2022 USD ($)	May 31, 2018 USD ($)
Number of Operating Segments	3	2
Deferred Grant Proceeds	$ 226
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

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8672-108599

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