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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock Above Minimum Threshold, Percent

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No definition available.

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- Definition

Share-based Compensation Arrangement By Share-based Payment Award, Future Vesting Rights, Percentage

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercises in Period, Intrinsic Value

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Estimated Performance Goal Achievement Rate

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Number of Installments

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Performance Awards, Threshold Level, Number of Shares, Multiplier

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Reduction of Share Reserve For Each Share Granted, Share

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No definition available.

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- Definition

The maximum number of shares authorized for issuance under the deferred compensation arrangement as of the balance sheet date.

+ References

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

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- Definition

Fair value of share-based compensation granted to nonemployees as payment for services rendered or acknowledged claims.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-Paragraph 28
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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Weighted average expected volatility rate of share-based compensation awards.

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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.

+ References

No definition available.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

The number of shares or units of entity securities issued in the transaction in which equity securities were issued to pay for goods or nonemployee services.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options.

+ References

No definition available.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

+ Details

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Stock-based Compensation - Narrative (Details)	1 Months Ended		12 Months Ended
Stock-based Compensation - Narrative (Details)	Oct. 31, 2017 USD ($) shares	Mar. 31, 2010 shares	Dec. 31, 2018 USD ($) installment $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares remaining available for issuance (shares) \| shares			7,897,144
Number of installments \| installment			2
Weighted average grant date fair value (usd per share) \| $ / shares			$ 5.34	$ 2.51	$ 2.32
Aggregate intrinsic value of options exercised			$ 7,600,000	$ 200,000	$ 600,000
Unrecognized compensation cost, options			$ 3,500,000
Incentive Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option price as a percent of common stock		100.00%
Non-Statutory Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option price as a percent of common stock		85.00%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of voting interests		10.00%
Purchase price of common stock when voting percent is above minimum threshold		110.00%
Expiration period		10 years
Vesting period of units granted	6 months	4 years
Award vesting rights percentage	16.67%
Nonemployee services transaction, quantity of securities issued (shares) \| shares	11,100		0		0
Nonemployee services transaction, value of securities issued	$ 48,000
Volatility	60.60%		60.00%	62.20%	64.20%
Risk-free interest rate	2.40%		2.70%	2.00%	1.30%
Weighted-average remaining amortization period (years)			2 years 6 months
Stock options \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights percentage		25.00%
Stock options \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights percentage		75.00%
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (shares) \| shares			86,000	275,000	330,000
Weighted-average remaining amortization period (years)			1 year 1 month
Weighted average grant date fair value (usd per share) \| $ / shares			$ 10.56	$ 4.22	$ 4.10
Equity instruments other than options, aggregate intrinsic value, vested			$ 2,900,000	$ 1,300,000	$ 1,000,000
Unrecognized compensation cost, awards other than options			$ 1,000,000
RSUs \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of units granted		3 years
Award vesting rights percentage		33.33333%
RSUs \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of units granted		4 years
Award vesting rights percentage		25.00%
RSAs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (shares) \| shares			47,000	143,000	185,000
Weighted-average remaining amortization period (years)			4 months 24 days
Weighted average grant date fair value (usd per share) \| $ / shares			$ 14.35	$ 4.75	$ 4.21
Equity instruments other than options, aggregate intrinsic value, vested			$ 2,100,000	$ 1,000,000	$ 1,800,000
Unrecognized compensation cost, awards other than options			$ 300,000
PBOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Threshold level multiplier			0
Granted (shares) \| shares			1,200,000	1,720,000
Volatility			60.30%	62.30%	0.00%
Risk-free interest rate			5.60%	5.30%	0.00%
Weighted-average remaining amortization period (years)			10 months 24 days
Weighted average grant date fair value (usd per share) \| $ / shares			$ 5.02	$ 2.54
Unrecognized compensation cost, awards other than options			$ 1,200,000
Exercises in period, intrinsic value			$ 200,000	$ 0	$ 0
PBOs \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Future vesting rights, percentage						50.00%
PBOs \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Future vesting rights, percentage						50.00%
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (shares) \| shares			306,000	276,000	629,000
Weighted-average remaining amortization period (years)			6 months
Weighted average grant date fair value (usd per share) \| $ / shares			$ 6.71	$ 4.25	$ 4.10
Equity instruments other than options, aggregate intrinsic value, vested			$ 5,400,000	$ 2,700,000	$ 1,800,000
Unrecognized compensation cost, awards other than options			$ 600,000
2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares initially available for future issuance (shares) \| shares		1,100,000
Reduction of share reserve for each share granted (shares) \| shares		1
2018 PSU and PBO Plan \| PBOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated performance goal achievement rate			118.00%
2017 PSU and PBO Plan \| PBOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated performance goal achievement rate				134.20%
2016 PSU Plan \| PBOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated performance goal achievement rate					142.30%
Granted (shares) \| shares					0