CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net (loss) income	$ (36,704)	$ 1,889
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	12,110	5,730
Amortization of deferred financing costs and debt discount	66	72
Deferred taxes	(4,536)	(7,144)
Stock-based compensation	7,121	7,776
Change in fair value of acquisition-related contingent consideration	40,385	960
Other noncash items	51	17
Changes in operating assets and liabilities, net of effect from acquisitions
Accounts receivable, net	(7,035)	(1,359)
Inventories	(818)	130
Rebates receivable	100	(30)
Prepaid expenses and other current assets	(5,015)	(18)
Other assets	267	(58)
Accounts payable	(5,163)	29
Accrued expenses and other liabilities	8,421	3,274
Other long-term liabilities	(7)	432
Net cash provided by operating activities	9,243	11,700
Cash flows from investing activities:
Purchases of property and equipment	(3,484)	(2,618)
Software development costs	(3,564)	(2,223)
Purchases of intangible assets	(29)
Acquisition of business, net of cash acquired	(21,981)	(34,452)
Net cash used in investing activities	(29,058)	(39,293)
Cash flows from financing activities:
Payments for repurchase of common stock	(2,866)	(959)
Proceeds from exercise of stock options	2,590	194
Payments for employee taxes for shares withheld		(2,123)
Payments for debt financing costs	(103)	(220)
Borrowings on line of credit	26,500	35,342
Repayments of line of credit		(342)
Payments of acquisition-related consideration		(550)
Payments of equity offering costs	(364)	(132)
Payments of contingent consideration	(1,646)	(1,498)
Repayments of long-term debt	(779)	(525)
Net cash provided by financing activities	23,332	29,187
Net increase in cash	3,517	1,594
Cash, beginning of period	10,430	4,345
Cash, end of period	13,947	5,939
Supplemental disclosure of cash flow information:
Acquisition of equipment under capital leases	442
Additions to property, equipment, and software development purchases included in accounts payable and accrued expenses	390	50
Deferred offering costs included in accounts payable		46
Cash paid for interest	251	$ 146
Employee payroll taxes on exercise of stock options included in accrued expenses	$ 348
Stock issued in connection with acquisition	3,595	11,541