Stockholders' Equity (Summary of Stock Option Activity) (Details) shares in Thousands	9 Months Ended
Sep. 30, 2021 $ / shares shares
Performance-based stock options [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of shares, Outstanding at September 30, 2021 \| shares	304
Weighted average exercise price, Outstanding at September 30, 21	$ 4.71
$1.16 – 20.90 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of shares, Outstanding at September 30, 2021 \| shares	14,638
Exercise price, lower range	$ 1.16
Exercise price, upper range	20.90
Weighted average exercise price, Outstanding at September 30, 21	$ 5.53
$23.39 – 46.37 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of shares, Granted \| shares	2,329
Exercise price, lower range	$ 23.39
Exercise price, upper range	46.37
Weighted average exercise price, Granted	$ 34.40
$2.05 – $4.90 [Member] \| Options to purchase common stock [Member] \| Omniome Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of shares, Granted \| shares	339
Exercise price, lower range	$ 2.05
Exercise price, upper range	4.90
Weighted average exercise price, Granted	4.43
$4.71 - $4.90 [Member] \| Omniome Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range	4.71
Exercise price, upper range	$ 4.90
$4.71 - $4.90 [Member] \| Performance-based stock options [Member] \| Omniome Plan [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of shares, Granted \| shares	304
Exercise price, lower range	$ 4.71
Exercise price, upper range	4.90
Weighted average exercise price, Granted	$ 4.71
$1.16 – 15.98 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of shares, Exercised \| shares	(4,406)
Exercise price, lower range	$ 1.16
Exercise price, upper range	15.98
Weighted average exercise price, Exercised	$ 5.37
$2.54 – 46.37 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of shares, Canceled \| shares	(501)
Exercise price, lower range	$ 2.54
Exercise price, upper range	46.37
Weighted average exercise price, Canceled	$ 5.28
$1.16 – 46.37 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of shares, Outstanding at September 30, 2021 \| shares	12,399
Exercise price, lower range	$ 1.16
Exercise price, upper range	46.37
Weighted average exercise price, Outstanding at September 30, 21	$ 10.99

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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