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STOCK-BASED COMPENSATION - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-Based Compensation Expense [Line Items]
Total stock-based compensation expense	$ 7.5	$ 10.1
Cost of testing revenue
Share-Based Compensation Expense [Line Items]
Total stock-based compensation expense	0.3	0.3
Research and development expense
Share-Based Compensation Expense [Line Items]
Total stock-based compensation expense	0.6	2.4
Selling, general, and administrative expense
Share-Based Compensation Expense [Line Items]
Total stock-based compensation expense	$ 6.6	$ 7.4

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of noncash expense for share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

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