Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Statement of Financial Position [Abstract]
Receivables, allowance for doubtful accounts	$ 716	$ 1,127
Serial preferred shares, no par value (in dollars per share)
Serial preferred shares, number of shares authorized	1,000,000	1,000,000
Common shares, par value (in dollars per share)	$ 1	$ 1
Common shares, number of shares authorized	10,000,000	10,000,000
Common shares, number of shares issued	5,466,000	5,468,000
Common shares, number of shares outstanding	5,466,000	5,468,000