Note 12 - Other Income (Expense)	12 Months Ended
Dec. 31, 2022
Notes to Financial Statements
Other Income and Other Expense Disclosure [Text Block]	12. Other Income/(Expense) Interest expense for the year ended December 31, 2022, 2021, and 2020 was $32 thousand, $49 thousand, and $75 thousand, respectively. There was no interest income for the years ended December 31, 2022, 2021, and 2020. Interest expense is included as a component of other income (expense) on the accompanying consolidated statements of operations and comprehensive loss.

The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-URI https://asc.fasb.org/topic&trid=2122503

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 610
-URI https://asc.fasb.org/topic&trid=49130413

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