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Fair value of common stock per share.

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Risk free rate description.

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Share based compensation arrangement by share based payment award performance target date to vest.

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Sharebased compensation arrangement by sharebased payment award options grants in period fair value.

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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.

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

Aggregate number of common shares reserved for future issuance.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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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

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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Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.

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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.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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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.

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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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- 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

As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest.

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- Definition

Description of significant modifications (such as a change in expiration dating, vesting rights, or exercise prices) to an equity-based compensation plan, including the terms of the modifications.

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- Definition

Number of share instruments newly issued under a share-based compensation plan.

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Share-Based Compensation - Additional Information (Detail) - USD ($)						12 Months Ended
	Nov. 04, 2015	Oct. 31, 2015	Sep. 04, 2015	Sep. 02, 2015	May. 20, 2015	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense						$ 2,004,000	$ 1,138,000	$ 933,000
Total fair value of stock options granted						$ 2,054,000	$ 2,108,000
Risk-free interest rate, Description						Risk-Free Interest Rate. The risk-free interest rate is based on the UK Government 10 year bond yield curve in effect at the time of grant prior to the initial public offering and 10 year U.S. Treasury Stock for awards from April 2014 onwards.
Number of restricted stock units awarded						12,500
Grant date fair value (per share)						$ 14.71	$ 8.34
Total compensation cost not yet recognized related to share options and RSUs						$ 3,900,000
Total compensation cost not yet recognized related to share options, RSUs, weighted average remaining amortization period						1 year 9 months 18 days
Deferred Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense								156,000
Remaining unrecognized compensation cost								$ 0
Ordinary Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value of ordinary shares per share						$ 8.80
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years	2 years	2 years		2 years		4 years
Number of restricted stock units awarded	8,000	10,328	9,867	25,000	10,000		50,000
Number of RSU's vested during period						12,500
Number of RSU's outstanding						37,500
Sales performance target date to vest				Dec. 31, 2022
Multi Year Performance Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of restricted stock units awarded					137,000
Award vesting description						if the volume weighted average price of the Company’s ordinary shares exceeds $60 for a continuous twenty day period between April 1, 2018 and December 31, 2018
Grant date fair value (per share)					$ 6.09
Minimum [Member] \| Ordinary Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average price of shares					$ 60
Employee Stock Option [Member] \| Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period						1 year
Employee Stock Option [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period						3 years
2012 Option Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Conversion of option into share						1
Maximum number of shares authorized for grant						839,509
Vesting period						3 years
Contractual life						10 years
Options exercisable percentage description						Options were not exercisable before the Company became a public company and all outstanding options become exercisable in the event of an acquisition of 75% or more of the share capital of the Company by a third party. No further awards will be granted under the 2012 Option Plan.
2014 Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Ordinary shares reserved for issuance						1,500,000