Allocated share based compensation benefit.

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- Definition

Employee stock purchase plan, maximum purchase in calendar year.

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- Definition

The highest quantity of shares an employee can purchase under the plan per purchase period.

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- Definition

Employee stock purchase plan, shares issued.

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- Definition

Maximum Percentage of Shares Issued Under Performance Based Restricted Stock Units Awards

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- Definition

Minimum Percentage of Shares Issued Under Performance Based Restricted Stock Units Awards

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- Definition

Percentage of performance stock units tied to fiscal year two thousand twenty one adjusted earnings per share goals.

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- Definition

Percentage of performance stock units tied to fiscal year two thousand twenty one revenue.

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- Definition

Percentage of performance stock units tied to fiscal year two thousand twenty one revenue goal.

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- Definition

Percentage of performance stock units tied to fiscal year two thousand twenty three revenue goal.

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- Definition

Percentage of performance stock units tied to fiscal year two thousand twenty two revenue goal.

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- Definition

Percentage of performance stock units tied to three year shareholder return.

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- Definition

Share based compensation arrangement by share based payment award, award performance period.

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No definition available.

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- Definition

Share-based compensation arrangement by share based payment award vesting period for the three year shareholder return.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

Aggregate number of common shares reserved for future issuance.

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

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- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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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).

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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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- Definition

Date the equity-based award expires, in YYYY-MM-DD format.

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- Definition

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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- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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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

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.

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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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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

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No definition available.

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Share Based Awards - Additional Information (Details) - USD ($)					1 Months Ended	3 Months Ended		6 Months Ended
	Sep. 20, 2021	Oct. 26, 2020	Oct. 23, 2018	Aug. 11, 2014	Jan. 27, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2021	Aug. 31, 2019	Aug. 31, 2017	Aug. 31, 2015	Oct. 31, 2005
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding stock options						1,703,064		1,703,064		2,791,084
Total share-based compensation						$ 5,223,000	$ 5,437,000	$ 11,635,000	$ 10,830,000
Fair value of options vested						$ 1,461,000		$ 1,771,000
2005 Employee Stock Option and Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance														4,800,000
Outstanding stock options						84,200		84,200
2015 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance											3,575,000	6,000,000
Common stock reserved													11,500,000
Shares available for future grant						1,506,567		1,506,567
Inducement Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance						1,500,000		1,500,000
Shares available for future grant						12,386		12,386
Employee Share Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance				4,000,000		3,175,733		3,175,733
Total share-based compensation						$ 129,000	140,000	$ 330,000	304,000
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						824,267		824,267
Employee Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding stock options						1,618,864		1,618,864
Total share-based compensation						$ 290,000	627,000	$ 999,000	1,359,000
Total unrecognized compensation costs						$ 386,000		$ 386,000
Stock option recognized over weighted average period (in years)								3 months 18 days
Employee Stock Options \| 2005 Employee Stock Option and Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expiration period (in years)								10 years
Share-based compensation award plan , expiration date								May 25, 2015
Employee Stock Options \| 2015 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expiration period (in years)								10 years
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number						1,815,406		1,815,406
Restricted Stock \| Inducement Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number						1,037,614		1,037,614
Performance Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option recognized over weighted average period (in years)								2 years 4 months 24 days
Total unrecognized compensation costs						$ 9,577,000		$ 9,577,000
Performance Stock Units \| Units Granted on September 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation						50,000
Share-based compensation arrangement by share-based payment award, options, grants in period, net of forfeitures	450,000
Weighted-average grant date fair value	$ 10.52
Performance period	5 years
Award continued service period	3 years
Performance Stock Units \| Units Granted On October 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation						575,000		514,000
Share-based compensation arrangement by share-based payment award, options, grants in period, net of forfeitures		408,861
Percentage of shares issued, minimum		8.50%
Percentage of shares issued, maximum		199.50%
Weighted-average grant date fair value		$ 16.25
Percentage of performance stock units tied to fiscal year 2022 revenue goal		80.00%
Vesting period for the 3-year total shareholder return		3 years
Percentage of performance stock units tied to fiscal year 2023 revenue goal		20.00%
Performance Stock Unit Awards \| Units Granted On October 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation						63,000	114,000		229,000
Share-based compensation arrangement by share-based payment award, options, grants in period, net of forfeitures			248,140
Percentage of shares issued, minimum			50.00%
Percentage of shares issued, maximum			200.00%
Weighted-average grant date fair value			$ 17.84
Percentage of performance stock units tied to 3-year total shareholder return			34.00%
Percentage of performance stock units tied to fiscal year 2021 revenue			33.00%
Percentage performance stock units tied to fiscal year 2021 adjusted earnings per share goals			33.00%
Allocated share-based compensation benefits								375,000
Performance Stock Unit Awards \| Units Granted On December 2019 and January 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation						$ 226,000	344,000		625,000
Share-based compensation arrangement by share-based payment award, options, grants in period, net of forfeitures					279,587
Percentage of shares issued, minimum					42.50%
Percentage of shares issued, maximum					172.50%
Weighted-average grant date fair value					$ 16.02
Allocated share-based compensation benefits								$ 231,000
Percentage of performance stock units tied to fiscal year 2021 revenue goal					80.00%
Percentage of performance stock units tied to fiscal year 2022 revenue goal					20.00%
Vesting period for the 3-year total shareholder return					3 years
Performance Stock Unit Awards \| Inducement Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number						450,000		450,000
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number						2,853,020		2,853,020		2,263,569
Total share-based compensation						$ 3,889,000	$ 4,150,000	$ 10,347,000	$ 8,189,000
Stock option recognized over weighted average period (in years)								2 years 3 months 18 days
Total unrecognized compensation costs						$ 35,632,000		$ 35,632,000
Share-based compensation arrangement by share-based payment award, options, grants in period, net of forfeitures								1,605,649
Restricted Stock \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period								1 year
Restricted Stock \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period								3 years