Stock-Based Compensation (Narrative) (Details)	12 Months Ended
Jun. 30, 2019 USD ($) Target shares	Jun. 30, 2018 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from stock plans	$ 318,000
Tax benefit related to tax deductions for non-qualified options and disqualifying dispositions under all share-based payment arrangements	$ 160,000
Shares available for future grants \| shares	793,797
Board Of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued to directors \| shares	15,328
Shares issued to directors, value	$ 68,000
Employee Stock Option [Member] \| 2004 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	390,000	$ 336,000
Unrecognized compensation cost	$ 129,000
Expected weighted average vesting period to recognize compensation	1 year 2 months 12 days
Employee Stock Option [Member] \| Minimum [Member] \| 2004 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Employee Stock Option [Member] \| Minimum [Member] \| Tranche 1 Through 4 [Member] \| 2004 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate	25.00%
Employee Stock Option [Member] \| Maximum [Member] \| 2004 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period before vesting begins	1 year
Employee Stock Option [Member] \| Maximum [Member] \| Tranche 1 Through 3 [Member] \| 2004 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate	33.33%
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 244,000	186,000
Expected weighted average vesting period to recognize compensation	1 year 9 months 18 days
Total unrecognized compensation related to restricted stock awards	$ 286,000
Operating Income-Based Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of performance targets \| Target	2
Operating Income-Based Performance Shares [Member] \| Minimum [Member] \| Tranche 1 Through 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate	75.00%
Operating Income-Based Performance Shares [Member] \| Maximum [Member] \| Tranche 1 Through 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate	200.00%
Revenue-Based Performance Shares [Member] \| Minimum [Member] \| Tranche 1 Through 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate	50.00%
Revenue-Based Performance Shares [Member] \| Maximum [Member] \| Tranche 1 Through 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate	150.00%
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 0	$ 165,000
Expected weighted average vesting period to recognize compensation	1 year 4 months 24 days
Total unrecognized compensation related to restricted stock awards	$ 355,000
Percentage of operating income targets achieved		161.50%
Performance Shares [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Threshold performance level for vesting award, percentage	75.00%

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