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Note 3 - Property and Equipment, Net (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Depreciation $ 57 $ 80 $ 132 $ 152
Property, Plant and Equipment, Disposals     38 10
Gain (Loss) on Disposition of Property Plant Equipment     $ 3