CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash	$ 76,964	$ 87,888
Accounts receivable, net of allowance for doubtful accounts of $204 and $285	15,355	17,545
Inventories	12,497	12,758
Prepaid expenses	2,520	1,719
Other current assets	365	493
Total current assets	107,701	120,403
PROPERTY AND EQUIPMENT, net	18,138	18,546
INTANGIBLE ASSETS, net	24,159	27,207
GOODWILL	24,017	25,445
OTHER ASSETS	410	124
TOTAL ASSETS	174,425	191,725
CURRENT LIABILITIES:
Accounts payable	3,381	3,380
Deferred revenue	4,400	5,580
Accrued expenses	8,196	7,960
Total current liabilities	15,977	16,920
OTHER LIABILITIES	383	89
DEFERRED INCOME TAXES	3,511	4,401
COMMITMENTS AND CONTINGENCIES (Note 6)
STOCKHOLDERS' EQUITY
Preferred stock, par value $.000001, 25,000 shares authorized, none issued
Common stock, par value $.000001, 120,000 shares authorized, 55,590 and 55,281 shares issued and outstanding
Additional paid-in capital	335,857	333,522
Accumulated other comprehensive loss	(3,251)	(666)
Accumulated deficit	(178,052)	(162,541)
Total stockholders' equity	154,554	170,315
Total liabilities and stockholders' equity	$ 174,425	$ 191,725