Consolidated Statements of Stockholders' Equity - USD ($)	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Treasury Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	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							$ 85,000	$ 24,486,000	$ 50,839,000	$ (6,584,000)	$ (578,000)	$ 68,248,000
Issuance of common stock for stock option exercise (in shares)							5,000					5,000
Issuance of common stock for stock option exercise								38,000				$ 38,000
Issuance of common stock for restricted stock grants (in shares)							190,000
Issuance of common stock for restricted stock grants							$ 2,000	(2,000)
Compensation expense related to stock compensation plans								1,754,000				1,754,000
Repurchase of common stock (in shares)										123,337
Repurchase of common stock										$ (1,367,000)		(1,367,000)
Forfeiture of restricted stock (in shares)										405,000
Forfeiture of restricted stock								4,000		$ (4,000)
Change in minimum pension liability, net of tax											(104,000)	(104,000)
Unrealized gain (loss) resulting from change in fair value of derivative instruments, net of tax											974,000	974,000
Net (loss) income									6,541,000			6,541,000
Balance (in shares) at Jun. 30, 2019							8,851,677			1,626,605
Balance (Accounting Standards Update 2016-02 [Member]) at Jun. 30, 2019			$ 318,000			$ 318,000
Balance at Jun. 30, 2019							$ 87,000	26,280,000	57,380,000	$ (7,955,000)	292,000	$ 76,084,000
Issuance of common stock for stock option exercise (in shares)												0
Issuance of common stock for restricted stock grants (in shares)							5,000
Issuance of common stock for restricted stock grants
Repurchase of common stock (in shares)										462,700
Repurchase of common stock										$ (3,747,000)		(3,747,000)
Forfeiture of restricted stock (in shares)										15,000
Forfeiture of restricted stock
Change in minimum pension liability, net of tax											(323,000)	(323,000)
Unrealized gain (loss) resulting from change in fair value of derivative instruments, net of tax											(1,024,000)	(1,024,000)
Net (loss) income									(1,645,000)			(1,645,000)
Compensation expense related to stock compensation plans								1,712,000				1,712,000
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect									128,000		(128,000)
Balance (in shares) at Jun. 30, 2020							8,856,677			2,104,305
Balance at Jun. 30, 2020							$ 87,000	$ 27,992,000	$ 56,181,000	$ (11,702,000)	$ (1,183,000)	$ 71,375,000