Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 86,543	$ 66,654
Accounts receivable, net of allowance of $124 and $212 at September 30, 2012 and December 31, 2011, respectively	36,974	42,226
Inventories	6,199	8,813
Restricted cash and investments	2,674
Prepaid expenses and other current assets	1,166	1,646
Deferred tax assets	94	1,732
Total current assets	133,650	121,071
Property and equipment, net	1,481	984
Restricted investments		364
Intangible assets, net		45,185
Goodwill	32,135	31,973
Other assets	605	749
Total assets	167,871	200,326
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	1,889	5,592
Accrued and other current liabilities	20,521	17,192
Short-term borrowing on line of credit		2,500
Contingent consideration	562
Total current liabilities	22,972	25,284
Contingent consideration		15,400
Deferred tax liabilities		8,715
Other long-term liabilities	269	469
Commitments and contingencies
Stockholders' equity:
Preferred stock; $0.001 par value; 10,000,000 shares authorized; no shares issued and outstanding
Common stock; $0.001 par value; 100,000,000 shares authorized; 55,663,484 and 57,847,367 shares issued and outstanding at September 30, 2012 and December 31, 2011, respectively	56	58
Additional paid-in capital	273,441	266,913
Accumulated other comprehensive income	2,693	2,341
Accumulated deficit	(131,560)	(118,854)
Total stockholders' equity	144,630	150,458
Total liabilities and stockholders' equity	$ 167,871	$ 200,326