Note 10 - Debt - Short-term Debt (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Short-term and current maturities	$ 2,559
Notes Payable to Banks [Member] | Brazil Bank Member | Three Point One Zero Percent Short-term Loan [Member]
Interest Rate	3.10%
Short-term and current maturities	$ 500
Notes Payable to Banks [Member] | Brazil Bank Member | Two Point Four Zero Percent Short-term Loan [Member]
Interest Rate	2.40%
Short-term and current maturities	$ 300
Notes Payable to Banks [Member] | Brazil Bank Member | Three Point One One Percent Short Term Loan Member
Interest Rate	3.11%
Short-term and current maturities	$ 500
Notes Payable to Banks [Member] | Brazil Bank Member | Six Point Zero Five Percent Short-term Loan [Member]
Interest Rate	6.05%
Short-term and current maturities	$ 1,000
Notes Payable to Banks [Member] | Bradesco Bank [Member] | Four Point Zero Percent Short Term Loan [Member]
Interest Rate	4.00%
Short-term and current maturities	$ 259