CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Consolidated net income	$ 38,802	$ 8,731	$ 4,954
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,174	9,182	8,066
Amortization of debt discount and debt issuance costs	651	1,728	1,886
Provision for allowances	4,705	4,034	1,779
Deferred income tax benefit	(33,812)	(5,322)	(1,544)
(Gain) loss on derivative liability	(1,581)	(5,805)	9,901
Acquisition-related contingent consideration	44	769	0
Impairment charges	14,356	24,311	2,100
Loss on early extinguishment of debt	4,969	1,568	0
Equity compensation	4,080	3,379	2,460
Other noncash costs, including loss on sale of business	24	6	2,204
Changes in operating assets and liabilities:
Accounts receivable	9,708	(30,781)	(28,708)
Prepaid expenses and other assets	1,816	(1,882)	2,663
Accounts payable and accrued expenses	(9,275)	20,370	11,213
Other liabilities	847	(143)	1,261
Net cash provided by operating activities	45,508	30,145	18,235
Cash flows from investing activities
Proceeds from sale of business	0	500	7,500
Acquisitions, net of cash acquired	(85,977)	(1,900)	(28,721)
Acquisition-related settlements	(292)	(1,858)	(149)
Transaction costs related to sale of business	0	0	(338)
Purchases of property and equipment	(5,111)	(6,522)	(2,362)
Net cash used in investing activities	(91,380)	(9,780)	(24,070)
Cash flows from financing activities
Proceeds from Term Loans	62,000	40,000	0
Principal payments on Term Loans	(1,500)	(30,500)	0
Convertible Note cash payment	(5,000)	0	0
Borrowings on revolving credit facility	39,000	59,800	64,100
Repayments on revolving credit facility	(39,000)	(67,800)	(59,600)
Debt issuance costs	(901)	(1,182)	0
Extinguishment fees	(578)	(641)	0
Cash paid for shares withheld for taxes	(1,774)	(917)	(543)
Payment of contingent consideration	(261)	(152)	0
Cash payments to noncontrolling shareholder	(1,217)	(701)	(494)
Other	(13)	(71)	(108)
Net cash provided by (used in) financing activities	50,756	(2,164)	3,355
Effect of exchange rate changes on cash	23	(24)	(62)
Change in cash and cash equivalents	4,907	18,177	(2,542)
Cash and cash equivalents at beginning of year	20,630	2,453	4,995
Cash and cash equivalents at end of year	25,537	20,630	2,453
Supplemental disclosure of cash flow information:
Interest paid	3,408	3,893	5,052
Income taxes paid	$ 697	$ 1,773	$ 1,035