Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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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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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Unrecognized cost of unvested options awarded to employees as compensation.

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Employee Equity-Based Compensation - Equity-Based Compensation Expense and Tax Benefit (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jan. 01, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Equity-based compensation expense	$ 4,235,000	$ 2,235,000	$ 7,450,000	$ 3,921,000
Unrecognized equity-based compensation cost	19,400,000		19,400,000
ASU 2016-09
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Additional deferred tax assets					$ 1,500,000
ASU 2016-09 \| Retained earnings
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Cumulative-effect adjustment					655,000
ASU 2016-09 \| Additional paid-in capital
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Cumulative-effect adjustment					$ 655,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Unrecognized equity-based compensation cost, restricted stock units	258,000		258,000
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Equity-based compensation expense	22,000	0	22,000	0
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Equity-based compensation expense	1,166,000	462,000	1,892,000	664,000
Sales, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Equity-based compensation expense	3,047,000	$ 1,773,000	$ 5,536,000	$ 3,257,000
Capitalized inventory
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Equity-based compensation expense	183,000
Property and equipment
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Equity-based compensation expense	$ 27,000