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Note 7 - Long-term Debt - Carrying Amount of the Company's Outstanding Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Other loans $ 287 $ 171
Debt discount and debt issuance costs, net of accumulated accretion (1,198) (3,587)
Total outstanding long-term debt 49,089 46,584
Less current portion 139 107
Total outstanding debt 48,950 46,477
Convertible Senior Notes Due July 2, 2024 [Member]    
Convertible debt $ 50,000 $ 50,000