Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Revenues	$ 42,177	$ 39,333
Cost of revenues	3,985	4,054
Gross profit	38,192	35,279
Operating expenses:
Sales and marketing	19,659	16,265
General and administrative	10,497	9,444
Unexchanged promotional merger shares	0	3,000
Total operating expenses	30,156	28,709
Income from operations	8,036	6,570
Other income	31	99
Income before income taxes	8,067	6,669
Income taxes	2,472	2,922
Net income	$ 5,595	$ 3,747
Basic net income per share (in dollars per share)	$ 0.36	$ 0.23
Diluted net income per share (in dollars per share)	$ 0.36	$ 0.23
Shares used in computing basic net income per share (in shares)	15,362	15,962
Shares used in computing diluted net income per share (in shares)	15,371	16,019