Note K - Shareholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended	12 Months Ended
	Sep. 25, 2018	Mar. 29, 2019	Jun. 30, 2019	Jun. 30, 2018
Stock Issued During Period, Shares, New Issues	1,533,334
Share Price	$ 22.50
Payments of Stock Underwriting Costs		$ 2,070
Payments of Stock Offering Expenses		220
Proceeds from Issuance of Common Stock		$ 32,210	$ 32,210
Common Stock, Shares, Outstanding, Ending Balance			13,240,278	11,553,685
Treasury Stock, Shares, Ending Balance			1,392,524	1,545,783
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total			157,043	67,286
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period			3,784	32,734
Treasury Stock, Shares, Acquired			0	0
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased			315,000	315,000
Common Stock, Dividends, Per Share, Cash Paid			$ 0	$ 0
Preferred Stock, Shares Authorized			200,000	200,000
Preferred Stock, Shares Issued, Total			0	0
Preferred Stock, Capital Shares Reserved for Future Issuance			150,000