Significant Accounting Policies, Accounting Changes (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Assets and Liabilities, Lessee [Abstract]
Operating lease right-of-use asset	$ 4,550
Operating lease liability	4,564
ASU 2016-02 [Member]
Assets and Liabilities, Lessee [Abstract]
Operating lease right-of-use asset	4,730
Operating lease liability	$ 4,730