Contract Assets and Liabilities Changes in Net Contract Assets (Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Contract assets
Current	$ 1,199	$ 2,183
Non-Current		244
Contract asset	1,199	2,427
Contract Liabilities
Current	2,361	4,473
Non-current	320	383
Contract liabilities	$ 2,681	$ 4,856

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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