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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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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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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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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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Convertible Redeemable Preferred Stock and Stockholders' Equity (Details 3)	1 Months Ended	3 Months Ended
	Jan. 31, 2015	Apr. 30, 2015	Nov. 07, 2014	Jan. 23, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant	1,043,000	932,375
Expiration period	10 years
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
2014 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant	1,043,000
Number of shares reserved and available for grant			4,500,000	2,700,000
2014 Equity Incentive Plan \| Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years	10 years
2014 Equity Incentive Plan \| Minimum \| Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years	2 years
2014 Equity Incentive Plan \| Maximum \| Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years	4 years