Employee stock purchase plan purchase price as percentage of market value.

No definition available.

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- Definition

Employee withhold percentage of gross earnings.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

No definition available.

+ Details

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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.

+ References

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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- Definition

Aggregate change in value for stock issued during the period as a result of employee stock purchase plan.

+ References

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-Publisher FASB
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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

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Stock-Based Compensation Expense - Additional Information (Detail) - USD ($)			3 Months Ended		9 Months Ended
	Sep. 15, 2016	Mar. 15, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Mar. 16, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period					4 years
Number of common stock repurchased					47,003
Purchase price of common stock by employees					85.00%
Stock-based compensation expense			$ 4,177,000	$ 1,427,000	$ 13,337,000	$ 2,833,000
General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			1,083,000	$ 400,000	$ 2,822,000	$ 985,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Employee Stock Purchase Plans	153,602	192,676
Stock Issued During Period, Value, Employee Stock Purchase Plans	$ 1,600,000	$ 2,100,000
Share issued, price per share	$ 10.60	$ 10.88
Closing price of shares issued		$ 12.80					$ 12.47
Employee Stock Purchase Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee withholding percentage					15.00%
Restricted Stock And Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense, restricted stock			15,400,000		$ 15,400,000
Unrecognized compensation expense, recognition period					2 years 7 months 6 days
Options to Purchase Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense, recognition period					2 years 8 months 12 days
Unrecognized compensation cost, stock options			7,200,000		$ 7,200,000
Stock options vested, fair value					$ 2,600,000
Stock options granted, weighted-average grant date fair value					$ 6.44
Options to Purchase Common Stock [Member] \| Chief Financial Officer [Member] \| General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			100,000
Stock Options and Restricted Stock [Member] \| Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental stock-based compensation expense			300,000
Stock Options and Restricted Stock [Member] \| Chief Financial Officer [Member] \| General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			$ 100,000