Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands		Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss), Net of Tax	Total
Balance at Jun. 30, 2019		$ 181	$ 94,351	$ 190,839	$ (164,891)	$ 161	$ 120,641
Balance (in shares) at Jun. 30, 2019		7,486,106
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				4,960			4,960
Other comprehensive loss						(28)	(28)
Purchase of treasury stock					(397)		(397)
Purchase of treasury stock (in shares)		(19,285)
Exercise of stock options			215				215
Exercise of stock options (in shares)		16,250
Forfeiture of restricted stock			72		(72)
Amortization of restricted stock			439				439
Stock options expense			41				41
Cash dividends	[1]			(2,095)			(2,095)
Balance at Dec. 31, 2019		$ 181	95,118	193,704	(165,360)	133	123,776
Balance (in shares) at Dec. 31, 2019		7,483,071
Balance at Sep. 30, 2019		$ 181	94,795	192,354	(165,309)	148	122,169
Balance (in shares) at Sep. 30, 2019		7,479,682
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				2,398			2,398
Other comprehensive loss						(15)	(15)
Purchase of treasury stock	[2]				(51)		(51)
Purchase of treasury stock (in shares)	[2]	(2,361)
Exercise of stock options			83				83
Exercise of stock options (in shares)		5,750
Amortization of restricted stock			219				219
Stock options expense			21				21
Cash dividends	[3]			(1,048)			(1,048)
Balance at Dec. 31, 2019		$ 181	95,118	193,704	(165,360)	133	123,776
Balance (in shares) at Dec. 31, 2019		7,483,071
Balance at Jun. 30, 2020		$ 181	95,593	194,345	(166,247)	104	$ 123,976
Balance (in shares) at Jun. 30, 2020		7,436,315					7,436,315
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				2,661			$ 2,661
Other comprehensive loss						(24)	(24)
Purchase of treasury stock	[4]				(36)		(36)
Purchase of treasury stock (in shares)	[4]	(3,061)
Distribution of restricted stock (in shares)		9,000
Forfeiture of restricted stock			81		(81)
Amortization of restricted stock			441				441
Stock options expense			49				49
Cash dividends	[5]			(2,083)			(2,083)
Balance at Dec. 31, 2020		$ 181	96,164	194,923	(166,364)	80	$ 124,984
Balance (in shares) at Dec. 31, 2020		7,442,254					7,442,254
Balance at Sep. 30, 2020		$ 181	95,948	194,789	(166,358)	99	$ 124,659
Balance (in shares) at Sep. 30, 2020		7,441,259
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				1,176			1,176
Other comprehensive loss						(19)	(19)
Purchase of treasury stock	[6]				(6)		(6)
Purchase of treasury stock (in shares)	[6]	(505)
Distribution of restricted stock (in shares)		1,500
Amortization of restricted stock			200				200
Stock options expense			16				16
Cash dividends	[7]			(1,042)			(1,042)
Balance at Dec. 31, 2020		$ 181	$ 96,164	$ 194,923	$ (166,364)	$ 80	$ 124,984
Balance (in shares) at Dec. 31, 2020		7,442,254					7,442,254

[1] Cash dividends of $0.28 per share were paid in the six months ended December 31, 2019.

[2] Includes the purchase of 505 shares of distributed restricted stock in settlement of employee withholding tax obligations.

[3] Cash dividends of $0.14 per share were paid in the quarter ended December 31, 2019.The accompanying notes are an integral part of these condensed consolidated financial statements.

[4] Includes the purchase of 3,061 shares of distributed restricted stock in settlement of employee withholding tax obligations.

[5] Cash dividends of $0.28 per share were paid in the six months ended December 31, 2020.

[6] Includes the purchase of 505 shares of distributed restricted stock in settlement of employee withholding tax obligations.

[7] Cash dividends of $0.14 per share were paid in the quarter ended December 31, 2020.