Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014
Numerator:
Net income	$ 8,238,000	$ 437,000	$ (82,000)	$ 134,000	$ 4,775,000	$ 251,000	$ 198,000	$ 133,000	$ 8,728,000	$ 5,357,000
Denominator:
Denominator for basic net income per share - weighted-average outstanding shares									9,573	9,570
Effect of dilutive securities:
Stock options and restricted stock									466	269
Denominator for diluted net income per share - weighted-average outstanding shares									10,039	9,839
Net income (loss) per share - basic (dollars per share)	$ 0.86	$ 0.05	$ (0.01)	$ 0.01	$ 0.50	$ 0.03	$ 0.02	$ 0.01	$ 0.91	$ 0.56
Net income (loss) per share - diluted (dollars per share)	$ 0.82	$ 0.04	$ (0.01)	$ 0.01	$ 0.48	$ 0.03	$ 0.02	$ 0.01	$ 0.87	$ 0.54
Income tax expense(benefit)	$ 5,814,000	$ (292,000)	$ 54,000	$ (89,000)	$ 4,597,000	$ (0.00)	$ (0.00)	$ (0.00)	$ 5,488,000	$ 4,597,000