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, 2018	8,656,677			1,098,268
Balance at Jun. 30, 2018	$ 85	$ 24,486	$ 50,839	$ (6,584)	$ (578)	$ 68,248
Compensation expense related to stock compensation plans		653				653
Repurchase of common stock (in shares)				674
Repurchase of common stock				$ (6)		(6)
Unrealized gain resulting from change in fair value of derivative instruments, net of tax					383	383
Net income			2,559			$ 2,559
Issuance of common stock for stock option exercise (in shares)	5,000					5,000
Issuance of common stock for stock option exercise		38				$ 38
Issuance of common stock for restricted stock grants (in shares)	15,000
Issuance of common stock for restricted stock grants
Balance (in shares) at Sep. 30, 2018	8,676,677			1,098,942
Balance at Sep. 30, 2018	$ 85	25,177	53,398	$ (6,590)	(195)	71,876
Balance (in shares) at Jun. 30, 2018	8,656,677			1,098,268
Balance at Jun. 30, 2018	$ 85	24,486	50,839	$ (6,584)	(578)	68,248
Balance (in shares) at Jun. 30, 2019	8,851,677			1,626,605
Balance at Jun. 30, 2019	$ 87	26,280	57,380	$ (7,955)	292	76,084
Compensation expense related to stock compensation plans		433				433
Repurchase of common stock (in shares)				1,717
Repurchase of common stock				$ (15)		(15)
Forfeiture of restricted stock (in shares)				15,000
Forfeiture of restricted stock
Cumulative-effect adjustment pursuant to adoption of ASU 2016-02 (Note E) | Accounting Standards Update 2016-02 [Member]			420			420
Reclassification pursuant to adoption of ASU 2018-02 (Note A) | Accounting Standards Update 2018-02 [Member]			128		(128)
Reclassification pursuant to adoption of ASU 2018-02 (Note A)					(128)
Unrealized gain resulting from change in fair value of derivative instruments, net of tax					387	387
Net income			96			$ 96
Issuance of common stock for stock option exercise (in shares)						0
Balance (in shares) at Sep. 30, 2019	8,851,677			1,643,322
Balance at Sep. 30, 2019	$ 87	$ 26,713	$ 58,024	$ (7,970)	$ 551	$ 77,405