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Correction (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018
Total classification changes required related to these adjustments
Accounts receivable allowances	$ (260)	$ 188
Accounts receivable	7,177	(9,413)
Unbilled services	(8,245)	(4,766)
Net cash used in operating activities	$ (46,109)	(32,801)
As previously reported
Total classification changes required related to these adjustments
Accounts receivable allowances		842
Accounts receivable		(9,868)
Unbilled services		(4,965)
Net cash used in operating activities		$ (32,801)

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The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

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Amount of increase (decrease) in 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 cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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