Net Income (Loss) Per Share - Computation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Numerator: Basic and Diluted
Net income - Basic	$ (672)	$ 228
Net income - Diluted	(672)	228
Dividends paid	(2,752)	(2,746)
Undistributed income (loss) - Basic	(3,424)	(2,518)
Undistributed income (loss) - Diluted	$ (3,424)	$ (2,518)
Percentage allocated to common shares	100.00%	99.00%
Undistributed income (loss) allocated to common shares - Basic	$ (3,424)	$ (2,493)
Undistributed income (loss) allocated to common shares - Diluted	(3,424)	(2,493)
Dividends paid on common shares outstanding	2,724	2,719
Net income (loss) available to common shares - Basic	(700)	226
Net income (loss) available to common shares - Diluted	$ (700)	$ 226
Denominator: Basic and Diluted
Weighted average common shares outstanding - Basic	12,382,207	12,345,564
Adjustment for dilutive potential common shares		7,520
Weighted average shares - Diluted	12,382,207	12,353,084
Basic net income per share (in dollars per share)	$ (0.06)	$ 0.02
Diluted net income per share (in dollars per share)	$ (0.06)	$ 0.02