Share Based Awards - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
Sep. 30, 2020	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Shares, Outstanding, Beginning	3,001,350
Number of Shares, Outstanding, Exercised	(2,250)
Number of Shares, Forfeited/Canceled	(32,150)
Number of Shares, Expired	(46,000)
Number of Shares, Outstanding, Ending	2,920,950	3,001,350
Vested and expected to vest, September 30, 2020	2,803,474
Exercisable, September 30, 2020	2,187,861
Weighted- Average Exercise Price per Share
Weighted-Average Exercise Price per Share, Outstanding, Beginning	$ 14.83
Weighted-Average Exercise Price per Share, Outstanding, Exercised	12.78
Weighted-Average Exercise Price per Share, Forfeited/Cancelled	17.43
Weighted-Average Exercise Price per Share, Expired	29.17
Weighted-Average Exercise Price per Share, Outstanding, Ending	14.58	$ 14.83
Vested and expected to vest, September 30, 2020 (in dollars per share)	14.57
Exercisable, September 30, 2020 (in dollars per share)	$ 14.49
Weighted- Average Remaining Contractual Life (years)
Outstanding	4 years 2 months 12 days	4 years 8 months 12 days
Exercised	3 years 7 months 6 days
Forfeited/Canceled	3 years 3 months 18 days
Vested and expected to vest, September 30, 2020	4 years 2 months 12 days
Exercisable, September 30, 2020	3 years 10 months 24 days
Aggregate Intrinsic Value
Outstanding	$ 24
Exercised	3
Vested and expected to vest, September 30, 2020	24
Exercisable, September 30, 2020	$ 23

Share-based compensation arrangement by share-based payment award options aggregate intrinsic value rollforward.

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Share-based compensation arrangement by share-based payment award, options, exercised, weighted average remaining contractual term.

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Share based compensation arrangement by share based payment award options forfeiture weighted average remaining contractual term.

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Remaining Contractual Life [Roll Forward]

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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

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

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share options (or share units) exercised during the current period.

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