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					(631)	(631)
Dividends declared			(1,808)			(1,808)
Net Income			14,027			14,027
Other comprehensive income (loss), net of taxes				36		36
Balance at Mar. 31, 2020	861	11,017	113,993	(970)	(908)	123,993
Balance at Dec. 31, 2019	861	11,017	110,374	(1,391)	(315)	120,546
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock repurchases					(593)	(593)
Dividends declared			(432)			(432)
Net Income			4,051			4,051
Other comprehensive income (loss), net of taxes				421		421
Balance at Mar. 31, 2020	861	11,017	113,993	(970)	(908)	123,993
Balance at Jun. 30, 2020	861	11,017	118,263	(428)	(908)	128,805
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(1,962)			(1,962)
Net Income			16,328			16,328
Other comprehensive income (loss), net of taxes				(4,084)		(4,084)
Balance at Mar. 31, 2021	861	11,017	132,629	(4,512)	(908)	139,087
Balance at Dec. 31, 2020	861	11,017	128,392	(626)	(908)	138,736
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(1,021)			(1,021)
Net Income			5,258			5,258
Other comprehensive income (loss), net of taxes				(3,886)		(3,886)
Balance at Mar. 31, 2021	$ 861	$ 11,017	$ 132,629	$ (4,512)	$ (908)	$ 139,087