Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at Jun. 30, 2019	$ 861	$ 11,017	$ 101,774	$ (1,006)	$ (277)	$ 112,369
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock repurchases					(38)	(38)
Dividends declared			(1,376)			(1,376)
Net Income			9,976			9,976
Other comprehensive loss, net of taxes				(385)		(385)
Balance at Dec. 31, 2019	861	11,017	110,374	(1,391)	(315)	120,546
Balance at Sep. 30, 2019	861	11,017	106,205	(1,277)	(277)	116,529
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock repurchases					(38)	(38)
Dividends declared			(944)			(944)
Net Income			5,113			5,113
Other comprehensive loss, net of taxes				(114)		(114)
Balance at Dec. 31, 2019	861	11,017	110,374	(1,391)	(315)	120,546
Balance at Jun. 30, 2020	861	11,017	118,263	(428)	(908)	128,805
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(941)			(941)
Net Income			11,070			11,070
Other comprehensive loss, net of taxes				(198)		(198)
Balance at Dec. 31, 2020	861	11,017	128,392	(626)	(908)	138,736
Balance at Sep. 30, 2020	861	11,017	122,670	(618)	(908)	133,022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(473)			(473)
Net Income			6,195			6,195
Other comprehensive loss, net of taxes				(8)		(8)
Balance at Dec. 31, 2020	$ 861	$ 11,017	$ 128,392	$ (626)	$ (908)	$ 138,736