CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 312	$ 3,025
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,658	1,594
Stock-based compensation expense	1,874	1,656
Deferred income taxes	329	344
Excess tax benefits from stock-based awards	0	(304)
Allowance for doubtful accounts	121	795
Other non-cash charges	117	160
Changes in operating assets and liabilities:
Decrease in accounts receivable	1,777	2,082
(Increase) in prepaid expenses and other assets, net	(1,469)	(305)
Decrease in accrued compensation and benefits	(2,220)	(2,472)
Increase / (decrease) in accounts payable and accrued expenses	312	(37)
Increase / (decrease) in deferred revenue	2,339	(832)
Decrease in deferred rent	(117)	(165)
Increase in other liabilities, net	3	2
Net cash provided by operating activities	5,036	5,543
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(12)	0
Additions to capitalized software	(1,200)	(722)
Net cash used in investing activities	(1,212)	(722)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchase of common stock	(5,077)	0
Proceeds pursuant to employee stock-based compensation plans	780	372
Excess tax benefits from stock-based awards	0	304
Surrender of restricted common stock for income tax purposes	(2,218)	(1,808)
Net cash used in financing activities	(6,515)	(1,132)
(Decrease) / Increase in cash and cash equivalents	(2,691)	3,689
Cash and cash equivalents at beginning of period	105,703	88,509
Cash and cash equivalents at end of period	$ 103,012	$ 92,198