Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Jun. 30, 2020	8,856,677			2,104,305
Balance at Jun. 30, 2020	$ 87	$ 27,992	$ 56,181	$ (11,702)	$ (1,183)	$ 71,375
Compensation expense related to stock compensation plans	$ 0	698	0	$ 0	0	$ 698
Treasury Stock Acquired, Shares (in shares)	0			418,949		418,949
Repurchase of common stock	$ 0	0	0	$ (3,501)	0	$ (3,501)
Unrealized gain (loss) resulting from change in fair value of derivative instruments, net of tax	0	0	0	0	(1,974)	(1,974)
Net income (loss)	$ 0	0	5,890	$ 0	0	$ 5,890
Issuance of common stock for stock option exercise (in shares)	30,442			0		100,000
Issuance of common stock for stock option exercise	$ 1	(1)	0	$ 0	0	$ 0
Balance (in shares) at Dec. 31, 2020	8,887,119			2,523,254
Balance at Dec. 31, 2020	$ 88	28,689	62,071	$ (15,203)	(3,157)	72,488
Balance (in shares) at Sep. 30, 2020	8,856,677			2,340,387
Balance at Sep. 30, 2020	$ 87	28,353	58,439	$ (13,445)	(2,303)	71,131
Compensation expense related to stock compensation plans	$ 0	337	0	$ 0	0	$ 337
Treasury Stock Acquired, Shares (in shares)	0			182,867		182,867
Repurchase of common stock	$ 0	0	0	$ (1,758)	0	$ (1,758)
Unrealized gain (loss) resulting from change in fair value of derivative instruments, net of tax	0	0	0	0	(854)	(854)
Net income (loss)	$ 0	0	3,632	$ 0	0	$ 3,632
Issuance of common stock for stock option exercise (in shares)	30,442			0		100,000
Issuance of common stock for stock option exercise	$ 1	(1)	0	$ 0	0	$ 0
Balance (in shares) at Dec. 31, 2020	8,887,119			2,523,254
Balance at Dec. 31, 2020	$ 88	28,689	62,071	$ (15,203)	(3,157)	72,488
Balance (in shares) at Jun. 30, 2021	9,004,365			2,567,797
Balance at Jun. 30, 2021	$ 88	29,456	66,949	$ (15,849)	(561)	80,083
Compensation expense related to stock compensation plans	$ 0	467	0	$ 0	0	$ 467
Treasury Stock Acquired, Shares (in shares)	0			190,394		190,394
Repurchase of common stock	$ 0	0	0	$ (2,537)	0	$ (2,537)
Forfeiture of restricted stock (in shares)	0			18,432
Forfeiture of restricted stock	$ 0	0	0	$ 0	0	0
Unrealized gain (loss) resulting from change in fair value of derivative instruments, net of tax	0	0	0	0	1,285	1,285
Net income (loss)	$ 0	0	5,103	$ 0	0	$ 5,103
Issuance of common stock for stock option exercise (in shares)						0
Balance (in shares) at Dec. 31, 2021	9,004,365			2,776,623
Balance at Dec. 31, 2021	$ 88	29,923	72,052	$ (18,386)	724	$ 84,401
Balance (in shares) at Sep. 30, 2021	9,004,365			2,584,821
Balance at Sep. 30, 2021	$ 88	29,678	70,205	$ (15,859)	393	84,505
Compensation expense related to stock compensation plans	$ 0	245	0	$ 0	0	$ 245
Treasury Stock Acquired, Shares (in shares)	0			189,702		189,702
Repurchase of common stock	$ 0	0	0	$ (2,527)	0	$ (2,527)
Forfeiture of restricted stock (in shares)	0			2,100
Forfeiture of restricted stock	$ 0	0	0	$ 0	0	0
Unrealized gain (loss) resulting from change in fair value of derivative instruments, net of tax	0	0	0	0	331	331
Net income (loss)	$ 0	0	1,847	$ 0	0	$ 1,847
Issuance of common stock for stock option exercise (in shares)						0
Balance (in shares) at Dec. 31, 2021	9,004,365			2,776,623
Balance at Dec. 31, 2021	$ 88	$ 29,923	$ 72,052	$ (18,386)	$ 724	$ 84,401