Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Document Fiscal Year Focus			2017
Numerator [Abstract]
Net income (loss)	$ 979	$ 337	$ 1,303	$ 221
Denominator [Abstract]
Denominator for basic net income (loss) per share - weighted-average outstanding shares (shares)	11,249	9,717	11,225	9,642
Effect of dilutive securities:
Stock options and restricted stock (shares)	1,496	949	1,488	898
Denominator for diluted net income (loss) per share - weighted-average outstanding shares (shares)	12,745	10,666	12,713	10,540
Net income (loss) per share - basic (dollars per share)	$ 0.09	$ 0.04	$ 0.12	$ 0.02
Net income (loss) per share - diluted (in dollars per share)	$ 0.08	$ 0.03	$ 0.10	$ 0.02