Share Based Payments - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended
May 31, 2019	May 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, term	10 years
Stock options vesting period	3 years
Annual percentage over three years	33.33%
Proceeds from the exercise of stock options	$ 23	$ 119
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options	$ 0	$ 0
Stock options weighted average grant date fair value	$ 1.65	$ 2.03
Shares available for future grants	1.7
Restricted stock awards requisite service period	3 years
Grant date fair value of shares vested	$ 100	$ 200
Unrecognized compensation cost	$ 1,300
Compensation cost of weighted average period	1 year 8 months 12 days
Two Thousand Sixteen Equity Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grants	1.4
Other Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grants	0.3
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from the exercise of stock options	$ 100
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options	$ 0
Vesting dates of outstanding options	2022-03
Expiration dates of options	2029-03
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting dates of outstanding options	2019-07
Expiration dates of options	2019-07

Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period Annual Percentage

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Options Award Vesting Date Month And Year

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Share Based Compensation Arrangement by Share Based Payment Award Options Expiration Year Month

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Share based compensation share based payment award option grant period maximum.

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Unrecognized cost of unvested share-based compensation awards.

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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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Amount of tax benefit from exercise of stock options granted under share-based compensation arrangement.

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Amount of cash inflow from exercise of stock options granted under share-based compensation 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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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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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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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 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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