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Significant Consolidated Balance Sheet Components - Prepaid Expense and Other Current Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Significant Consolidated Balance Sheet Components [Abstract]
Prepaid expenses	$ 10.4	$ 12.0
Contract assets	5.8	3.0
Certificate of deposit	2.0	2.0
Other current assets	0.1	0.4
Total prepaid expenses and other current assets	$ 18.3	$ 17.4

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- Definition

Significant Consolidated Balance Sheet Components

+ References

No definition available.

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- Definition

Amount, before 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, classified as current.

+ References

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Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment within one year or during the operating cycle, if shorter.

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Amount of current assets classified as other.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

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