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Revenues - Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Unbilled receivable	$ 24,811	$ 27,147
ASUS
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Unbilled receivable	12,354	14,835
Receivable from the U.S. government	73,160	79,818
Contract assets	14,177	9,587
Contract liabilities	$ 322	$ 257

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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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The amount of receivables that are derived from government contracts.

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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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