Long-Term Debt (Schedule of Future Minimum Payments for Capital Leases) (Details) $ in Thousands	Mar. 31, 2018 USD ($)
Long-Term Debt [Abstract]
2018	$ 636
2019	30
Total minimum lease payments	666
Less: amount representing estimated executory costs (such as taxes, maintenance and insurance), including profit thereon, included in total minimum lease payments	(21)
Net minimum lease payments	645
Less: amount representing interest	(11)	[1]
Present value of net minimum lease payments	634	[2]
Current obligations under capital leases	631
Noncurrent obligations under capital leases	$ 3

[1] Amount necessary to reduce net minimum lease payments to present value calculated at the Company's incremental borrowing rate at lease inception.

[2] Included in the balance sheet as $631,000 of the current portion of long-term debt and $3,000 of the long- term debt, less current portion.