Represents the percentage of estimated future forfeiture rate for stock-based awards.

No definition available.

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- Definition

Represents the number of share-based compensation plans approved by the board of directors and stockholders of the entity.

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Share based compensation arrangement by share based payment award percentage vesting of awards granted per anniversary of the vesting start date.

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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.

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- Definition

Aggregate number of common shares reserved for future issuance.

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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.

+ References

No definition available.

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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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- 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 weighted average fair value at grant date for nonvested equity-based awards issued 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

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

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- Definition

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

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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

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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

Indicates method to determine compensation cost for share-based payments by estimating expected forfeitures or recognizing forfeitures when they occur. Acceptable values are "Estimating expected forfeitures" and "Recognizing forfeitures when they occur".

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

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Stock-based Compensation (Details) $ / shares in Units, $ in Thousands				1 Months Ended				3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 14, 2019 shares	Jun. 28, 2018	Jul. 31, 2018 $ / shares shares	Jan. 31, 2018 $ / shares shares	Nov. 30, 2017 $ / shares shares	Apr. 30, 2014 shares	May 31, 2019 USD ($) item shares	May 31, 2018 USD ($) shares	May 31, 2019 USD ($) item shares	May 31, 2018 USD ($) shares
Stock-based Compensation
Number of share-based compensation plans \| item								1		1
Additional number of shares authorized for issuance							250,000
Shares of common stock reserved for issuance								521,000	521,000	521,000	521,000
Common stock available for future issuance (in shares)								191,000	196,000	191,000	196,000
Share-based Compensation, Forfeiture Method [Fixed List]										Estimating expected forfeitures
Estimated forfeiture rate (as a percent)								0.00%		0.00%
Stock-based compensation expense \| $								$ 27	$ 52	$ 117	$ 101
Cost of revenues
Stock-based Compensation
Stock-based compensation expense \| $								10	19	34	33
Research and development
Stock-based Compensation
Stock-based compensation expense \| $								6	10	21	16
Selling, general and administrative
Stock-based Compensation
Stock-based compensation expense \| $								$ 11	$ 23	$ 62	$ 52
Maximum
Stock-based Compensation
Vesting period										1 year
Directors \| Restricted stock unit
Stock-based Compensation
Stock units granted (in shares)				7,500		2,500
Vesting percentage			100.00%
Grant-date fair value (in dollars per share) \| $ / shares				$ 4.75		$ 4.15
Officer and Employees \| Restricted stock unit
Stock-based Compensation
Stock units granted (in shares)					56,700
Grant-date fair value (in dollars per share) \| $ / shares					$ 4.10
Vesting percentage per anniversary of the vesting start date					50.00%
Subsequent Event
Stock-based Compensation
Additional number of shares authorized for issuance		500,000
Plan expiration date		Nov. 03, 2023
Maximum grant limit per employee per one year period		35,000
Subsequent Event \| Directors \| Restricted stock unit
Stock-based Compensation
Vesting percentage	100.00%