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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Share-Based Payment Arrangement [Abstract] |
Schedule of Stock Option Activity | A summary of the stock option activity under the Company's equity plans, and inducement awards for the year ended December 31, 2022 is as follows:
(number of shares in millions) | Number of shares |  | Weighted average exercise price |  | Weighted average remaining contractual life (years)
Options outstanding at December 31, 2021 | 1.4 |  |  | $ | 20.38 |  |  |
Less: |  |  |  |  |
Options exercised | — |  |  | 26.22 |  |  |
Options canceled or expired | (0.7) |  |  | 26.99 |  |  |
Options outstanding at December 31, 2022 | 0.7 |  |  | 13.38 |  |  | 4.62
Options exercisable at December 31, 2022 | 0.4 |  |  | 13.38 |  |  | 4.62
Options vested and expected to vest | 0.7 |  |  | $ | 13.38 |  |  | 4.62
Schedule of Restricted Stock Units Activity | A summary of the RSU awards activity under the Company's equity plans and inducement awards, including PSU awards for the year ended December 31, 2022, is as follows:
| 2022
(number of shares in millions) | Number of shares |  | Weighted average grant date fair value
RSUs unvested and outstanding at December 31, 2021 | 3.1 |  |  | $ | 24.96 |
RSUs granted | 2.3 |  |  | 25.78 |
Less: |  |  |
RSUs vested | (1.2) |  |  | 25.32 |
RSUs canceled | (0.5) |  |  | 26.83 |
RSUs unvested and outstanding at December 31, 2022 | 3.7 |  |  | $ | 25.08 |
Schedule of Stock-Based Compensation Expense | Stock-based compensation expense recognized and included in the Consolidated Statements of Operations was allocated as follows:
| Years Ended December 31, |  | Six-month Transition Period Ended December 31, |  | Year Ended June 30,
(in millions) | 2022 |  | 2021 |  | 2020 |  | 2020
Cost of testing revenue | $ | 1.7 |  |  | $ | 1.5 |  |  | $ | 0.6 |  |  | $ | 1.2 |
Cost of other revenue | — |  |  | 0.1 |  |  | 0.1 |  |  | 0.3 |
Research and development expense | 5.2 |  |  | 4.2 |  |  | 2.4 |  |  | 5.0 |
Selling, general, and administrative expense | 31.2 |  |  | 30.5 |  |  | 11.8 |  |  | 18.7 |
Total stock-based compensation expense | $ | 38.1 |  |  | $ | 36.3 |  |  | $ | 14.9 |  |  | $ | 25.2 |
Schedule of Aggregate Intrinsic Value | The aggregate intrinsic value of options outstanding, aggregate intrinsic value of options that are fully vested and aggregate intrinsic value of RSUs vested and expected to vest is as follows:
(in millions) | As of December 31, 2022
Aggregate intrinsic value of options outstanding | $ | 0.8 |
Aggregate intrinsic value of options fully vested | 0.4 |
Aggregate intrinsic value of RSUs outstanding | 54.0 |
Schedule of Intrinsic Value of Options Exercised | The total intrinsic value of options exercised was as follows:
| Years Ended December 31, |  | Six-month Transition Period Ended December 31, |  | Year Ended June 30,
(in millions) | 2022 |  | 2021 |  | 2020 |  | 2020
Total intrinsic value of options exercised | $ | — |  |  | $ | 29.2 |  |  | $ | 0.5 |  |  | $ | 8.8 |
Schedule of Shares Purchased and Compensation Expenses for ESPP | Shares purchased under, and compensation expense associated with, the Amended and Restated 2012 Purchase Plan for the periods reported are as follows:
| Years Ended December 31, |  | Six-month Transition Period Ended December 31, |  | Year Ended June 30,
(in millions) | 2022 |  | 2021 |  | 2020 |  | 2020
Shares purchased under the plans | 0.3 |  |  | 0.2 |  |  | 0.1 |  |  | 0.3 |
Plan compensation expense | $ | 1.9 |  |  | $ | 1.5 |  |  | $ | 0.6 |  |  | $ | 1.7 |
Schedule of Valuation Assumptions for ESPP | The fair value of shares issued under the Amended and Restated 2012 Purchase Plan that was in effect for each period reported was calculated using the Black‑Scholes option-pricing model using the weighted-average assumptions below. Each of these inputs is subjective and its determination generally requires significant judgment.
| Years Ended December 31, |  | Six-month Transition Period Ended December 31, |  | Year Ended June 30,
| 2022 |  | 2021 |  | 2020 |  | 2020
Risk-free interest rate | 1.4% |  | 0.1% |  | 0.2% |  | 1.8%
Expected dividend yield | —% |  | —% |  | —% |  | —%
Expected life (in years) | 0.5 |  | 0.5 |  | 0.5 |  | 0.5
Expected volatility | 53% |  | 60% |  | 94% |  | 99%

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- Definition Schedule Of Share-Based Compensation Arrangement By Share-Based Payment Award, Aggregate Intrinsic Value + References No definition available. + Details
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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the total intrinsic value of options exercised (or share units converted), share-based liabilities paid, and the total fair value of shares vested during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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