Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 706	$ 1,127
Serial preferred shares, no par value
Serial preferred shares, shares authorized	1,000,000	1,000,000
Common shares, par value (in dollars per share)	$ 1	$ 1
Common shares, shares authorized	10,000,000	10,000,000
Common shares, shares issued	5,525,000	5,468,000
Common shares, shares outstanding	5,525,000	5,468,000