CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities
Net income ( loss)	$ 7,428	$ (9,793)	$ (7,319)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Provision for doubtful accounts	8,047	9,347	7,787
Depreciation	8,987	8,858	9,978
(Decrease) increase in deferred rent	(14)	355	(215)
Deferred income tax expense (benefit)	245	(2,499)	53
Stock-based compensation	4,952	4,037	3,303
Amortization of intangibles	3,501	3,692	2,340
Accretion of debt discount and amortization of deferred charges	259
Loss on extinguishment of debt		203
Changes in operating assets and liabilities:
Accounts receivable	(7,677)	(12,795)	(4,597)
Inventory	188	299	340
Prepaid expenses and other assets	(3)	(128)	(637)
Accounts payable	(4,699)	47	2,369
Accrued and other liabilities	(464)	788	(2,143)
Liability associated with the Civil Investigative Demand	(6,400)	6,400
Net cash provided by operating activities	14,350	8,811	11,259
Investing activities
Acquisition of business, net of cash acquired		(14,100)
Purchases of property and equipment and investment in internally developed software	(13,600)	(12,781)	(8,169)
Net cash used in investing activities	(13,600)	(26,881)	(8,169)
Financing activities
(Payments) proceeds related to the exercising of stock options and vesting of RSUs	(353)	1,051	847
Issuance of long-term debt		41,838
Principal payments of long-term debt	(938)	(26,434)
Principal payments on capital lease obligations	(480)	(529)	(84)
Net cash (used in) provided by financing activities	(1,771)	15,926	763
Net (decrease) increase in cash and cash equivalents	(1,021)	(2,144)	3,853
Cash and cash equivalents - beginning of period	20,007	22,151
Cash and cash equivalents - end of period	18,986	20,007	22,151
Supplemental disclosure of cash flow information
Cash paid for interest	1,044	856	132
Cash paid for taxes	$ 384	$ 148	$ 112