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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Class A [Member]
Common Stock [Member]
Common Class A [Member]
Treasury Stock [Member]
Common Class A [Member]
Common Class C [Member]
Common Stock [Member]
Common Class C [Member]
Additional Paid-in Capital [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Total
Balance at Jun. 30, 2020 $ 347 $ (1,879)   $ 52   $ 15,623 $ (4) $ 2,625 $ 16,764
Balance (in Shares) at Jun. 30, 2020 13,866,913 855,432   2,068,635          
Purchases of shares of Common Stock (class A)   $ (2)             (2)
Purchases of shares of Common Stock (class A) (in Shares)   1,000              
Issuance of stock under ESPP shares of Common Stock (class A)   $ 1             1
Issuance of stock under ESPP shares of Common Stock (class A) (in Shares)   (267)              
Share-based compensation, net of tax   $ 1       1     2
Share-based compensation, net of tax (in Shares)   (900)              
Dividends declared               (113) (113)
Other comprehensive income (loss), net of tax             4   4
Net income               1,944 1,944
Balance at Sep. 30, 2020 $ 347 $ (1,879)   $ 52   15,624   4,456 18,600
Balance (in Shares) at Sep. 30, 2020 13,866,913 855,265   2,068,635          
Balance at Jun. 30, 2020 $ 347 $ (1,879)   $ 52   15,623 (4) 2,625 16,764
Balance (in Shares) at Jun. 30, 2020 13,866,913 855,432   2,068,635          
Purchases of shares of Common Stock (class A) (in Shares)   16,096              
Other comprehensive income (loss), net of tax                 12
Net income                 18,605
Balance at Dec. 31, 2020 $ 347 $ (1,925)   $ 52   15,627 8 21,003 35,112
Balance (in Shares) at Dec. 31, 2020 13,866,913 863,653   2,068,635          
Balance at Sep. 30, 2020 $ 347 $ (1,879)   $ 52   15,624   4,456 18,600
Balance (in Shares) at Sep. 30, 2020 13,866,913 855,265   2,068,635          
Purchases of shares of Common Stock (class A)   $ (60)             (60)
Purchases of shares of Common Stock (class A) (in Shares)   15,096              
Issuance of stock under ESPP shares of Common Stock (class A)           1     1
Issuance of stock under ESPP shares of Common Stock (class A) (in Shares)   (308)              
Share-based compensation, net of tax   $ 14       2     16
Share-based compensation, net of tax (in Shares)   (6,400)              
Dividends declared               (114) (114)
Other comprehensive income (loss), net of tax             8   8
Net income               16,661 16,661
Balance at Dec. 31, 2020 $ 347 $ (1,925)   $ 52   15,627 8 21,003 35,112
Balance (in Shares) at Dec. 31, 2020 13,866,913 863,653   2,068,635          
Balance at Jun. 30, 2021 $ 347 $ (2,172)   $ 52   15,677 6,587 33,833 54,324
Balance (in Shares) at Jun. 30, 2021 13,866,913 898,953 13,866,913 2,068,635 2,068,635        
Purchases of shares of Common Stock (class A)   $ (82)             (82)
Purchases of shares of Common Stock (class A) (in Shares)   13,647              
Issuance of stock under ESPP shares of Common Stock (class A)   $ 6       8     14
Issuance of stock under ESPP shares of Common Stock (class A) (in Shares)   (2,228)              
Share-based compensation, net of tax           388     388
Dividends declared               (338) (338)
Other comprehensive income (loss), net of tax             (635)   (635)
Net income               2,390 2,390
Balance at Sep. 30, 2021 $ 347 $ (2,248)   $ 52   16,073 5,952 35,885 56,061
Balance (in Shares) at Sep. 30, 2021 13,866,913 910,372   2,068,635          
Balance at Jun. 30, 2021 $ 347 $ (2,172)   $ 52   15,677 6,587 33,833 54,324
Balance (in Shares) at Jun. 30, 2021 13,866,913 898,953 13,866,913 2,068,635 2,068,635        
Purchases of shares of Common Stock (class A) (in Shares)   24,104              
Other comprehensive income (loss), net of tax                 (1,222)
Net income                 5,980
Balance at Dec. 31, 2021 $ 347 $ (2,297)   $ 52   16,425 5,365 39,137 59,029
Balance (in Shares) at Dec. 31, 2021 13,866,913 918,287 13,866,913 2,068,635 2,068,635        
Balance at Sep. 30, 2021 $ 347 $ (2,248)   $ 52   16,073 5,952 35,885 56,061
Balance (in Shares) at Sep. 30, 2021 13,866,913 910,372   2,068,635          
Purchases of shares of Common Stock (class A)   $ (54)             (54)
Purchases of shares of Common Stock (class A) (in Shares)   10,457              
Issuance of stock under ESPP shares of Common Stock (class A)   $ 5       7     12
Issuance of stock under ESPP shares of Common Stock (class A) (in Shares)   (2,542)              
Share-based compensation, net of tax           345     345
Dividends declared               (338) (338)
Other comprehensive income (loss), net of tax             (587)   (587)
Net income               3,590 3,590
Balance at Dec. 31, 2021 $ 347 $ (2,297)   $ 52   $ 16,425 $ 5,365 $ 39,137 $ 59,029
Balance (in Shares) at Dec. 31, 2021 13,866,913 918,287 13,866,913 2,068,635 2,068,635