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Consolidated Statements Of Changes In Shareholders' Equity - USD ($)
$ in Thousands
Total Par Value Of Common Shares [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
Total
Balance, period start at Jun. 30, 2018   $ 26,321 $ 209,553 $ (2,044) $ 241,698
Balance, shares at Jun. 30, 2018 7,868,000        
Issuance of common stock:          
Stock options exercised, net   41     44
Stock options exercised, net, shares 3,000        
Unrealized gain (loss) on available for sale investments, net of tax       17 17
Long-term incentive compensation   (115)     (108)
Long-term incentive compensation, shares 7,000        
Stock-based compensation   440     446
Stock-based compensation, shares 6,000        
Cash dividends declared     (1,734)   (1,734)
Net income     1,296   1,296
Balance, period end at Sep. 30, 2018   26,687 209,115 (2,027) 241,659
Balance, shares at Sep. 30, 2018 7,884,000        
Balance, period start at Jun. 30, 2018   26,321 209,553 (2,044) $ 241,698
Balance, shares at Jun. 30, 2018 7,868,000        
Issuance of common stock:          
Stock options exercised, net, shares         5,000
Balance, period end at Jun. 30, 2019   27,512 170,004 8 $ 205,427
Balance, shares at Jun. 30, 2019 7,903,000       7,902,708
Issuance of common stock:          
Unrealized gain (loss) on available for sale investments, net of tax       $ (8) $ (8)
Long-term incentive compensation   109     109
Stock-based compensation   1,201     1,240
Stock-based compensation, shares 39,000        
Cash dividends declared     (1,754)   (1,754)
Net income     9,551   9,551
Balance, period end at Sep. 30, 2019   $ 28,822 177,759   $ 214,523
Balance, shares at Sep. 30, 2019 7,942,000       7,941,762
Adoption of ASU 2016-02 | Accounting Standards Update 2016-02 [Member]     $ (42)   $ (42)