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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No definition available.

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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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No definition available.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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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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STOCKHOLDERS' EQUITY: - Summary of Options (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Stock options outstanding and exercisable by exercise price range
Options outstanding (in shares)	1,374,430
Options outstanding - Weighted-average remaining contractual life	4 years 6 months
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 14.81
Options exercisable (in shares)	1,213,177
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 15.67
Stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Share-based compensation expense	$ 3.3	$ 5.0	$ 6.9
Range of exercise price per share from $0.61 to $9.99
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	$ 0.61
Exercise price per share, high end of range (in dollars per share)	$ 9.99
Options outstanding (in shares)	214,347
Options outstanding - Weighted-average remaining contractual life	5 years 6 months
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 1.52
Options exercisable (in shares)	122,502
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 1.59
Range of exercise price per share from $10.00 to $19.99
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	10.00
Exercise price per share, high end of range (in dollars per share)	$ 19.99
Options outstanding (in shares)	709,672
Options outstanding - Weighted-average remaining contractual life	3 years 7 months 6 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 14.69
Options exercisable (in shares)	640,264
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 14.39
Range of exercise price per share from $20.00 to $24.99
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	20.00
Exercise price per share, high end of range (in dollars per share)	$ 24.99
Options outstanding (in shares)	450,411
Options outstanding - Weighted-average remaining contractual life	5 years 6 months
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 21.32
Options exercisable (in shares)	450,411
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 21.32