CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 5,094	$ 8,698
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,234	4,815
Stock-based compensation expense	6,037	5,801
Deferred income taxes	986	1,035
Excess tax benefits from stock-based awards	0	(494)
Allowance for doubtful accounts	1,164	314
Loss in equity interest	1,204	210
Other non-cash charges	0	13
Changes in operating assets and liabilities:
Decrease in accounts receivable	3,106	1,816
Increase in prepaid expenses and other assets, net	(895)	(870)
Decrease in accrued compensation and benefits	(1,677)	(287)
(Decrease) / increase in accounts payable and accrued expenses	(172)	1,569
Decrease in deferred revenue	(1,731)	(1,997)
Decrease in deferred rent	(474)	(544)
(Decrease) / increase in other liabilities, net	(635)	9
Net cash provided by operating activities	17,241	20,088
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(217)	(93)
Additions to capitalized software	(3,346)	(2,954)
Maturity of U.S. Treasury Bills and Investments	1,248	2,490
Purchases of US Treasury Bills and Investments	1,232	2,490
Payments to acquire investments	0	(295)
Acquisitions	3,150	1,359
Payments for Other Investing Activities	113	200
Net cash used in investing activities	(6,810)	(4,901)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchase of common stock	(13,322)	(2,495)
Proceeds pursuant to employee stock-based compensation plans	1,188	880
Excess tax benefits from stock-based awards	0	494
Surrender of restricted common stock for income tax purposes	(3,204)	(2,505)
Net cash used in financing activities	(15,338)	(3,626)
(Decrease) / Increase in cash and cash equivalents	(4,907)	11,561
Cash and cash equivalents at beginning of period	105,703	88,509
Cash and cash equivalents at end of period	$ 100,796	$ 100,070