Note 3 - Long-term Borrowings - Long-term Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Long-term borrowings, gross	$ 2,042
	1,656	$ 1,071
Current portion of long-term borrowing		(246)
Non-current portion of long-term borrowing	1,656	825
Convertible Debt [Member]
Long-term borrowings, gross		250
Debt instrument, unamortized discount		(4)
Notes Payable, Other Payables [Member]
Long-term borrowings, gross	1,995	945
Debt instrument, unamortized discount	(386)	(120)
Accrued interest – long term	$ 47

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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