Earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Weighted average common shares outstanding during the period - shares used for basic earnings per common share	9,802	9,711
Common shares issuable under share based payment plans which are potentially dilutive	51	60
Common shares used for diluted earnings per common share	9,853	9,771
Income from continuing operations	$ 7,473	$ 1,131
Discontinued operations	0	1,663
Net income	$ 7,473	$ 2,794
Basic earnings per common share
Income from continuing operations	$ 0.76	$ 0.12
Discontinued operations	0.00	0.17
Net income	0.76	0.29
Diluted earnings per common share
Income from continuing operations	0.76	0.12
Discontinued operations	0.00	0.17
Net income	$ 0.76	$ 0.29