Condensed Consolidated Statements of Operations - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue from services	$ 228,488,000	$ 214,988,000	$ 645,374,000	$ 611,014,000
Operating expenses:
Direct operating expenses	168,008,000	156,778,000	475,091,000	446,912,000
Selling, general and administrative expenses	47,346,000	45,922,000	141,182,000	133,530,000
Bad debt expense	433,000	19,000	1,082,000	496,000
Depreciation and amortization	2,849,000	2,092,000	7,325,000	6,969,000
Acquisition-related contingent consideration	(605,000)	237,000	(54,000)	707,000
Acquisition and integration costs	1,366,000	0	1,953,000	0
Restructuring costs	724,000	611,000	724,000	611,000
Impairment charges	0	0	0	24,311,000
Total operating expenses	220,121,000	205,659,000	627,303,000	613,536,000
Income (loss) from operations	8,367,000	9,329,000	18,071,000	(2,522,000)
Other expenses (income):
Interest expense	1,221,000	1,435,000	2,975,000	4,678,000
Gain on derivative liability	0	(7,105,000)	(1,581,000)	(19,970,000)
Loss on early extinguishment of debt	0	0	4,969,000	1,568,000
Other income, net	(57,000)	(92,000)	(116,000)	(143,000)
Income before income taxes	7,203,000	15,091,000	11,824,000	11,345,000
Income tax expense (benefit)	159,000	802,000	1,278,000	(5,035,000)
Consolidated net income	7,044,000	14,289,000	10,546,000	16,380,000
Less: Net income attributable to noncontrolling interest in subsidiary	321,000	223,000	983,000	529,000
Net income attributable to common shareholders	$ 6,723,000	$ 14,066,000	$ 9,563,000	$ 15,851,000
Net income per share attributable to common shareholders - Basic (in dollars per share)	$ 0.19	$ 0.44	$ 0.28	$ 0.49
Net income (loss) per share attributable to common shareholders - Diluted (in dollars per share)	$ 0.19	$ 0.22	$ 0.24	$ (0.04)
Weighted average common shares outstanding:
Basic (shares)	35,748	32,221	34,768	32,088
Diluted (shares)	36,036	36,255	36,179	36,215