Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Stock option activity and related information
Number of options outstanding at June 30, 2017	97,250
Number of options granted	0
Number of options exercised	(31,050)	(24,813)	(68,037)
Number of options cancelled	0
Number of options outstanding at June 30, 2018	66,200	97,250
Number of options vested or expected to vest at June 30, 2018	66,200
Number of options exercisable at June 30, 2018	66,200
Weighted average remaining contractual life	3 years 5 months	4 years 5 months
Weighted average remaining contractual life vested or expected to vest at June 30, 2018	3 years 5 months
Weighted average remaining contractual life exercisable at June 30, 2018	3 years 5 months
Weighted average exercise price at June 30, 2017	$ 10.19
Weighted average exercise price granted	0.00
Weighted average exercise price exercised	10.19
Weighted average exercise price cancelled	0.00
Weighted average exercise price at June 30, 2018	10.19	$ 10.19
Weighted average exercise price vested or expected to vest at June 30, 2018	10.19
Weighted average exercise price exercisable at June 30, 2018	$ 10.19
Aggregate intrinsic value outstanding at June 30, 2017	$ 540	$ 0
Aggregate intrinsic value exercised	287	300	$ 700
Aggregate intrinsic value outstanding at June 30, 2018	540	$ 0
Aggregate intrinsic value vested or expected to be vest at June 30, 2018	540
Aggregate intrinsic value exercisable at June 30, 2018	$ 540

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. 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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Number of fully vested and expected to vest options outstanding that can 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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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. 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 price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents 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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Number of share options (or share units) exercised during the current period.

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