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Organization and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedules of Concentration of Risk, by Risk Factor

Three of our customers are significant. The following table sets forth the percentage of total revenues that the revenues of these customers represented for the periods shown:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2019			2018			2019			2018
Distributor A	17	%		15	%		16	%		15	%
Distributor B	11	%		*			12	%		13	%
Distributor C	12	%		*			10	%		*
* less than 10%

The following table sets forth the percentage of accounts receivable that is attributable to our significant customers for the periods shown:

	September 30, 2019			December 31, 2018
Distributor A	20	%		19	%
Distributor B	11	%		15	%
Distributor C	13	%		*
* less than 10%

Contract with Customer, Asset and Liability

The table below shows revenue that we recognized as a result of changes in the contract liability balances in the periods shown.

	Three Months Ended September 30,								Nine Months Ended September 30,
(In millions)	2019				2018				2019				2018
Revenue recognized in the period from:
Amounts included in contract liabilities at the beginning of the period	$	2.9			$	5.0			$	2.6			$	1.9

Schedule of Earnings Per Share, Basic and Diluted

The following table sets forth the computation of basic and diluted net income per share for the periods shown.

	Three Months Ended September 30,								Nine Months Ended September 30,
(In millions)	2019				2018				2019				2018
Net income	$	45.8			$	46.6			$	8.4			$	52.6
Net income per common share:
Basic	$	0.50			$	0.53			$	0.09			$	0.60
Diluted	$	0.50			$	0.52			$	0.09			$	0.59
Basic weighted average shares outstanding	91.3				88.5				90.9				88.0
Effect of potentially dilutive stock options	—				0.2				—				0.2
Effect of potentially dilutive restricted stock units	1.2				1.6				1.3				1.1
Diluted weighted average shares outstanding	92.5				90.3				92.2				89.3

Outstanding anti-dilutive securities not included in diluted net loss per share

Outstanding anti-dilutive securities not included in the diluted net income per share attributable to common stockholders calculations were as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
(In millions)	2019			2018			2019			2018
Unvested restricted stock units	—			—			0.3			0.3
Senior convertible notes due 2022	4.0			4.0			4.0			4.0
Senior convertible notes due 2023	5.2			—			5.2			—
2023 Warrants	5.2			—			5.2			—
Total	14.4			4.0			14.7			4.3

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Tabular disclosure of contract balances and changes in contract balances.

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