Future Minimum Capital Lease Payments (Details) $ in Thousands	Sep. 30, 2018 USD ($)
Lessee, Capital Lease, Interest Rate	(1.53%)
Capital Leases, Future Minimum Payments, Remainder of Fiscal Year	$ 156
Capital Leases, Future Minimum Payments Due, Next Twelve Months	624
Capital Leases, Future Minimum Payments Due in Two Years	624
Capital Leases, Future Minimum Payments Due in Three Years	624
Capital Leases, Future Minimum Payments Due in Four Years	624
Capital Leases, Future Minimum Payments Due in Five Years	45
Capital Leases, Future Minimum Payments Due	2,697
Capital Leases, Future Minimum Payments, Interest Included in Payments	(38)
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments	2,659
Accrued Liabilities [Member]
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments	609
Other Noncurrent Liabilities [Member]
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments	$ 2,050