Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017
Assets
Total Assets	$ 9,089	$ 27,091
Investment securities
Assets
Total Assets	9,089	27,091
Level 1
Assets
Total Assets	9,089	27,091
Level 1 | Investment securities
Assets
Total Assets	$ 9,089	$ 27,091