Long-Term Debt And Lease Liabilities (Supplemental Balance Sheet Information Related To Leases) (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Long-Term Debt And Lease Liabilities [Abstract]
Right of use asset - operating leases	$ 84
Lease liabilities - current	59
Lease liabilities - noncurrent	25
Total operating lease liabilities	84
Other property and equipment, gross	293
Accumulated depreciation	(124)
Other property and equipment, net	169
Lease liabilities - current	77
Lease liabilities - noncurrent	35
Total finance lease liabilities	$ 112