Accrued Liabilities an Other Long-term Liabilities Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other Long-term Liabilities [Abstract]
Operating lease liabilities, LT	$ 28,896	$ 0
Contract liabilities	472	14,020
Deferred Revenue	94	468
Benefits	1,131	962
Accrued rent	1,642	1,779
Contract settlement	0	1,667
Other	585	1,696
OTHER LONG-TERM LIABILITIES	$ 32,820	$ 20,592