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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income (loss) from operations	$ 3,846	$ (22,399)	$ 10,514
Adjustments to reconcile net income (loss) from operations to net cash provided by (used in) operations:
Depreciation, amortization, and impairment of intangible assets	12,138	10,601	10,777
Loss (gain) on disposal of assets	(49)	185	14
Deferred tax expense (benefit)	(7,431)	13,053	(4,936)
Stock-based compensation	3,973	3,466	2,766
Accounts receivable, net	(11,960)	(8,428)	(8,106)
Inventories, net	(2,388)	5,380	3,198
Contract assets	(3,110)
Accounts payable	(1,475)	(1,013)	163
Income taxes payable	(2,541)	11,926	(582)
Accrued expenses	2,211	2,514	4
Deferred compensation	(291)	(77)	226
Deferred revenue	9,538	3,704	14,396
Other assets and liabilities	(1,235)	(1,285)	(19)
Net cash provided by operating activities	1,226	17,627	28,415
Cash flows from investing activities:
Purchase of short term investments	(22,820)	(178,658)	(184,690)
Maturities of short term investments	80,000	195,000	134,775
Purchase of Dealflo, net of cash acquired	(53,065)
Additions to property and equipment	(3,685)	(3,088)	(2,043)
Other	(236)	(456)	(4,538)
Net cash provided by (used in) investing activities	194	12,798	(56,496)
Cash flows from financing activities:
Tax payments for restricted stock issuances	(970)	(640)	(1,051)
Net cash used in financing activities	(970)	(640)	(1,051)
Effect of exchange rate changes on cash	(1,556)	(469)	(45)
Net increase (decrease) in cash	(1,106)	29,316	(29,177)
Cash, cash equivalents, and restricted cash, beginning of period	78,661	49,345	78,522
Cash, cash equivalents, and restricted cash, end of period	77,555	78,661	49,345
Supplemental cash flow disclosures:
Cash paid for income taxes	$ 10,884	$ 6,427	$ 5,982

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