CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 6,790	$ 4,756
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,235	2,666
Stock-based compensation expense	3,644	3,117
Deferred income taxes	690	658
Excess tax benefits from stock-based awards	(348)	(859)
Allowance for doubtful accounts	904	1,157
Other non-cash charges	194	246
Changes in operating assets and liabilities:
Decrease (increase) in accounts receivable	1,560	(4,747)
Decrease in prepaid expenses and other assets, net	1	1,953
Increase (Decrease) in Accrued Salaries	(1,413)	(2,792)
Increase in accounts payable and accrued expenses	668	2,075
Decrease in deferred revenue	(2,959)	(426)
Decrease in deferred rent	(338)	(240)
Increase (decrease) in other liabilities, net	5	(119)
Net cash provided by operating activities	12,633	7,445
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(62)	(469)
Additions to capitalized software	(1,924)	(1,567)
Proceeds from Sale, Maturity and Collection of Investments	2,598	2,600
Purchases of US Treasury Bills	(2,598)	(2,595)
Proceeds from the sale of property and equipment	0	185
Other investing activities	0	(45)
Net cash used in investing activities	(1,986)	(1,891)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchase of common stock	(1,421)	(8,807)
Proceeds pursuant to employee stock-based compensation plans	565	186
Excess tax benefits from stock-based awards	348	859
Surrender of restricted common stock for income tax purposes	(1,987)	(2,149)
Net cash used in financing activities	(2,495)	(9,911)
Increase (decrease) in cash and cash equivalents	8,152	(4,357)
Cash and cash equivalents at beginning of period	88,509	89,955
Cash and cash equivalents at end of period	96,661	85,598
Income Taxes Paid, Net	$ 1,297	$ 28