Note 5 - Credit Facilities - Summary of Credit and Other Debt Facilities (Details) $ in Thousands	Mar. 31, 2017 USD ($)
2017	$ 6,530
2018	$ 5
Sterling Credit Facility [Member]
Line of Credit Facility, Interest Rate at Period End	4.50%
2017	$ 5,800
2018
Mizuho Bank [Member]
Line of Credit Facility, Interest Rate at Period End	0.10%
2017	$ 19
2018	$ 5
Oxford Funding Pty Ltd [Member]
Line of Credit Facility, Interest Rate at Period End	6.40%
2017	$ 252
2018
Bradeso Bank [Member]
Line of Credit Facility, Interest Rate at Period End	17.30%
2017	$ 459
2018