CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Statement of Financial Position [Abstract]
Accounts and other receivables, net of allowance for doubtful accounts of: $34,000 at June 30, 2018; $46,000 at September 30, 2017	$ 34	$ 46
Common stock, par value (in dollars per share)	$ 0.50	$ 0.50
Common stock, authorized shares (in shares)	20,000,000	20,000,000
Common stock, issued shares (in shares)	8,445,060	8,445,060
Treasury stock, shares (in shares)	167,900	167,900