CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 16,536	$ 30,933	[1]
Short-term investments	99,684	100,762	[1]
Accounts receivable, net	12,895	16,603	[1]
Inventories, net	12,294	11,240	[1]
Prepaid expenses and other	7,995	2,012	[1]
Total current assets	149,404	161,550	[1]
Property and equipment, net	5,593	4,474	[1]
Intangible assets, net	7,782	0	[1]
Goodwill	13,241	960	[1]
Deferred tax asset	368	0	[1]
Other non-current assets	55	54	[1]
Total assets	176,443	167,038	[1]
Current liabilities:
Accounts payable	5,046	5,453	[1]
Deferred revenue	7,150	6,953	[1]
Accrued liabilities	4,236	4,949	[1]
Total current liabilities	16,432	17,355	[1]
Non-current liabilities:
Deferred revenue	2,574	2,878	[1]
Deferred tax liability	2,100	0	[1]
Total liabilities	21,106	20,233	[1]
Commitments and contingencies (Note 12)	0	0	[1]
Stockholders' equity:
Preferred stock, $0.001 par value; 15,000 shares authorized: none issued and outstanding	0	0	[1]
Common stock, $0.001 par value; 32,500 shares authorized; 20,548 and 19,696 shares issued and outstanding at March 31, 2013 and December 31, 2012, respectively	21	20	[1]
Additional paid-in capital	215,816	199,793	[1]
Accumulated other comprehensive loss	(851)	(76)	[1]
Accumulated deficit	(59,649)	(52,932)	[1]
Total stockholders' equity	155,337	146,805	[1]
Total liabilities and stockholders' equity	$ 176,443	$ 167,038	[1]

[1] Amounts have been derived from the December 31, 2012 audited consolidated financial statements.