Employee Stock Purchase Plan [Abstract]

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- Definition

Employee Stock Purchase Plan, Employee Contribution, Percent Of Employees' Gross Pay

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- Definition

Employee Stock Purchase Plan, Exercise Price As A Percentage Of Fair Value

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- Definition

Employee Stock Purchase Plan, Maximum Purchase In Calendar Year

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- Definition

Employee Stock Purchase Plan, Maximum Purchase In Single Transaction, Shares

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- Definition

Employee Stock Purchase Plan, Share Reserved For Future Issuance

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- Definition

Employee Stock Purchase Plan, Shares Issued

+ References

No definition available.

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- Definition

Share based awards.

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No definition available.

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- Definition

Share based compensation arrangement by share based payment awards options vested in period total fair value.

+ References

No definition available.

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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
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ 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

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 number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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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- 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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- Definition

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

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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

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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.

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Share Based Awards (Details Textual) - USD ($)		3 Months Ended		9 Months Ended
Share Based Awards (Details Textual) - USD ($)	Aug. 11, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016	Aug. 31, 2015	Oct. 31, 2005
Share Based Awards (Textual) [Abstract]
Outstanding options under 1998 and 2005 plan		2,964,315,000		2,964,315,000		2,447,286
Weighted-average grant date fair value per share of stock options				$ 4.92	$ 3.33
Number of shares granted				1,056,500
Total share-based compensation		$ 2,001,000	$ 743,000	$ 5,177,000	$ 2,328,000
Fair value of options vested				1,189,000	1,564,000
Employee Stock Option [Member]
Share Based Awards (Textual) [Abstract]
Total unrecognized compensation costs		8,662,000		$ 8,662,000
Stock option recognized over weighted average period (in years)				3 years 2 months
Restricted Stock Units Award [Member]
Share Based Awards (Textual) [Abstract]
Total share-based compensation		1,054,000	249,000	$ 2,571,000	664,000
Total unrecognized compensation costs		9,930,000		$ 9,930,000
Stock option recognized over weighted average period (in years)				2 years 2 months
Employee Share Purchase Plan [Member]
Share Based Awards (Textual) [Abstract]
Total share-based compensation		$ 70,000	$ 70,000	$ 277,000	$ 216,000
2005 Stock Options Plan [Member]
Share Based Awards (Textual) [Abstract]
Common stock reserved								4,800,000
Outstanding options under 1998 and 2005 plan		969,565		969,565
Number of Shares Outstanding		567		567
Two Thousand Fifteen Stock Options Plan [Member]
Share Based Awards (Textual) [Abstract]
Common stock reserved							11,500,000
Outstanding options under 1998 and 2005 plan		1,994,750		1,994,750
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number		933,165		933,165
Shares available for future grant		8,079,983		8,079,983
Two Thousand Fifteen Stock Options Plan [Member] \| Restricted Stock Units Award [Member]
Share Based Awards (Textual) [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				857,456
Number of Shares Outstanding		933,732		933,732		191,247
Two Thousand Fifteen Stock Options Plan [Member] \| Employee Stock Option [Member]
Share Based Awards (Textual) [Abstract]
Expiration period (in years)				10 years
Employee Share Purchase Plan [Member]
Employee Stock Purchase Plan [Abstract]
Shares reserved for future grant	4,000,000	3,790,124		3,790,124
Maximum percentage of gross payroll deduction	15.00%
Purchase price as a percentage of fair market value	90.00%
Maximum shares purchase in a single transaction	1,500
Maximum amount purchased in a calendar year	$ 25,000
Shares issued		209,876		209,876