Accrued Liabilities Long-term liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accrued Liabilities [Abstract]
Liabilities for contracts	$ 5,028	$ 14,020
contract settlement-LT	833	1,667
Capital Lease Obligations, Noncurrent	30,116	0
Accrued Employee Benefits	985	962
Accrued Rent	1,764	1,779
Contract with Customer, Liability, Noncurrent	294	468
Other Accrued Liabilities, Noncurrent	1,419	1,696
OTHER LONG-TERM LIABILITIES	$ 40,439	$ 20,592	[1]

[1] December 31, 2018 balances were derived from audited consolidated financial statements.