Average remaining contractual term of options outstanding.

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- Definition

Reserved share percentage of outstanding shares.

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No definition available.

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- Definition

Share based compensation arrangement by share based payment award fair value assumptions expected forfeiture rate.

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- Definition

Aggregate number of common shares reserved for future issuance.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

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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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No definition available.

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Paragraph 2

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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 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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-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(iii)

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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-Name Accounting Standards Codification

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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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-Name Accounting Standards Codification

-Topic 718

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-Paragraph 2

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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 maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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-Paragraph 2

-Subparagraph (a)(3)

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- Definition

Gross number of share options (or share units) granted during the period.

+ 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.

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-Publisher FASB

-Name Accounting Standards Codification

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-Paragraph 2

-Subparagraph (d)(1)

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- Definition

The increase or decrease in number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding, including vested options.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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- Definition

Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.

+ References

No definition available.

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- Definition

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

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No definition available.

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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

Amount of capitalized and expensed compensation cost from equity-based compensation arrangements.

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-SubTopic 10

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-Subparagraph (SAB TOPIC 14.D.2)

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-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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- Definition

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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-Publisher FASB

-Name Accounting Standards Codification

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Stock-Based Compensation - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
	May. 05, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Apr. 16, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted during period			0	1,211,917	0
Restricted shares issued	360,508
Compensation expense by type of award		$ 1,972,308	$ 0	$ 3,125,910	$ 0
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance							300,000
Percentage of shares outstanding						1.00%
Increase in number of shares available for issuance						150,000
Stock Option Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected forfeiture rate				12.40%
Expected dividend rate				0.00%
Contractual term, options				10 years
Contractual term, vesting				4 years
Closing price of common stock		$ 3.87		$ 3.87
Unrecognized stock-based compensation expense relating to unvested employee stock awards		$ 5,200,000	$ 0	$ 5,200,000	$ 0
Unrecognized stock-based compensation expense, weighted average period					3 years 3 months 22 days
Weighted average fair value of options granted				$ 9.73
Compensation expense by type of award		$ 1,075,263		$ 1,670,470
Stock Option Plans [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate				1.50%
Expected average option life				5 years
Expected volatility				79.10%
Stock Option Plans [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate				2.20%
Expected average option life				9 years 9 months 18 days
Expected volatility				92.60%
Stock Option Plans [Member] \| 2006 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance		89,182		89,182
Number of shares granted during period				80,900
Stock Option Plans [Member] \| 2015 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for issuance		1,819,100		1,819,100
Number of shares granted during period				246,675
Reserved share, percentage of outstanding shares		6.00%		6.00%
Shares authorized and reserved for issuance		1,200,000		1,200,000
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted, weighted average fair value	$ 10.00
Restricted stock requisite service period	4 years
Unrecognized compensation cost		$ 2,100,000		$ 2,100,000
Compensation expense by type of award		$ 897,045		$ 1,455,440
Restricted Stock Units [Member] \| After Six Month Of Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term, vesting	6 months
Restricted stock award vested percentage	50.00%
Restricted Stock Units [Member] \| After One Year Of Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term, vesting	1 year
Restricted stock award vested percentage	12.50%
Restricted Stock Units [Member] \| After Thirty Six Months Of Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term, vesting	36 months