Number of equal vesting installments.

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- Definition

Share-based compensation arrangement by share-based payment award, equity instruments other than options, expected to vest.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award options exercisable period.

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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

Unrecognized cost of unvested share-based compensation awards.

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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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 equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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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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- 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

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

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

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- Definition

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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- Definition

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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Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the 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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- Definition

Aggregate value of stock related to Restricted Stock Awards issued during the period.

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Stock-Based Compensation - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2019 USD ($) $ / shares shares	Jun. 30, 2018 USD ($) Installment shares	Mar. 31, 2018 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense \| $	$ 0		$ 0
Stock options granted under equity incentive plans	0		0
Unrecognized compensation expense related to non-vested stock options \| $	$ 0
Fully-vested and exercisable stock options outstanding, number of shares	4,000
Fully-vested and exercisable stock options outstanding, weighted average exercise price \| $ / shares	$ 31.89
Fully-vested and exercisable stock options outstanding, weighted average remaining contractual life	1 year 5 months 12 days
Total value of restricted stock award \| $		$ 200,000
Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted		42,000
Number of shares vested		17,000
Number of shares expected to vest		25,000
Number of equal vesting installments \| Installment		4
Restricted Stock Award [Member] \| Prepaid Assets [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to non-vested restricted stock award \| $	$ 30,000
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option exercisable period	7 years
2015 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding under equity incentive plans	4,000
Common stock available for future issuance	756,000