Note 4 - Credit Facilities - Summary of Credit and Other Debt Facilities (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Repayments of Principal, 2019	$ 10,049
Repayments of Principal, 2020	592
Repayments of Principal, 2021	300
Repayments of Principal, 2022	300
Repayments of Principal, 2023	700
Branco Bradesco [Member]
Repayments of Principal, 2019	753
Repayments of Principal, 2020
Repayments of Principal, 2021
Repayments of Principal, 2022
Repayments of Principal, 2023
Branco Bradesco [Member] \| Minimum [Member]
Interest Rate	0.37%
Branco Bradesco [Member] \| Maximum [Member]
Interest Rate	0.92%
Branco Santander [Member]
Interest Rate	1.38%
Repayments of Principal, 2019	$ 82
Repayments of Principal, 2020
Repayments of Principal, 2021
Repayments of Principal, 2022
Repayments of Principal, 2023
PNC Bank, National Association [Member]
Interest Rate	5.02%
Repayments of Principal, 2019	$ 8,450
Repayments of Principal, 2020
Repayments of Principal, 2021
Repayments of Principal, 2022
Repayments of Principal, 2023
Fifth Third Bank [Member]
Interest Rate	5.23%
Repayments of Principal, 2019
Repayments of Principal, 2020
Repayments of Principal, 2021
Repayments of Principal, 2022
Repayments of Principal, 2023
Resource Plus Acquisition Note [Member]
Interest Rate	1.85%
Repayments of Principal, 2019	$ 333
Repayments of Principal, 2020	334
Repayments of Principal, 2021	300
Repayments of Principal, 2022	300
Repayments of Principal, 2023	$ 700
National Australia Bank [Member]
Interest Rate	6.56%
Repayments of Principal, 2019	$ 431
Repayments of Principal, 2020
Repayments of Principal, 2021
Repayments of Principal, 2022
Repayments of Principal, 2023
Bancomer Bank and Shareholder Loan [Member]
Interest Rate	12.50%
Repayments of Principal, 2019
Repayments of Principal, 2020	258
Repayments of Principal, 2021
Repayments of Principal, 2022
Repayments of Principal, 2023

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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