CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 54,798	$ 33,756	$ 107,036	$ 67,508
Contract costs	42,941	26,250	84,281	52,706
General and administrative costs	6,260	4,477	12,174	8,653
Acquisition costs	0	143	0	143
Depreciation and amortization	1,760	560	3,619	1,123
Total operating costs	50,961	31,430	100,074	62,625
Income from operations	3,837	2,326	6,962	4,883
Interest expense, net	906	544	1,846	721
Income before income taxes	2,931	1,782	5,116	4,162
Income tax expense	855	517	1,488	1,207
Net income	$ 2,076	$ 1,265	$ 3,628	$ 2,955
Net income per share - basic (in dollars per share)	$ 0.17	$ 0.11	$ 0.30	$ 0.25
Net income per share - diluted (in dollars per share)	$ 0.16	$ 0.10	$ 0.28	$ 0.23
Weighted average common stock outstanding
Basic (in shares)	12,299	12,036	12,193	11,999
Diluted (in shares)	13,003	13,087	12,886	13,030