Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2024	Sep. 30, 2024
Allowance for Doubtful Accounts Receivable, Current	$ 5,182	$ 5,349
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	125,000,000	125,000,000
Common stock, issued (in shares)	59,153,757	59,031,953
Common stock, outstanding (in shares)	45,691,888	45,570,084
Treasury stock, shares (in shares)	13,461,869	13,461,869