CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Revenue	$ 34,401	$ 29,905	$ 64,616	$ 56,016
Direct expenses	26,953	23,504	50,636	43,804
Gross margin	7,448	6,401	13,980	12,212
General and administrative expenses	4,684	4,008	9,564	8,729
Depreciation and amortization	560	554	1,066	755
Income from operations	2,204	1,839	3,350	2,728
Interest expense, net	261	255	539	619
Income before income taxes	1,943	1,584	2,811	2,109
Income tax expense, net	627	605	4,346	806
Net income (loss)	$ 1,316	$ 979	$ (1,535)	$ 1,303
Net income per share, basic (in dollars per share)	$ 0.11	$ 0.09	$ (0.13)	$ 0.12
Net income (loss) per share - diluted (in dollars per share)	$ 0.10	$ 0.08	$ (0.13)	$ 0.10
Weighted average common shares outstanding
Basic (in shares)	11,889	11,249	11,863	11,225
Diluted (in shares)	12,886	12,745	11,863	12,713