Note 5 - Borrowings - Schedule of Debt (Details) - The 2017 Notes [Member] - Senior Notes [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2012
Principal balance	$ 85,938	$ 85,938
Unamortized debt premium	5,005	4,177
Total, 2017 Notes	$ 90,943	$ 90,115

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Balance Type:	credit
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