CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 23,546	$ 14,020
Marketable securities	62,026	74,666
Accounts receivable, net of allowance for doubtful accounts of $0 and $20, respectively	8,841	5,193
Inventories	11,114	10,729
Deferred tax asset	40	55
Other current assets and prepaid expenses	1,439	1,432
Total current assets	107,006	106,095
Property and equipment, net	933	853
Long-term investments	0	3,027
Deferred tax asset, net of current portion	553	446
Intangibles, net	2,566	446
Goodwill	1,339	0
Other long-term asset	397	486
Total assets	112,794	111,353
Current liabilities:
Accounts payable	2,107	2,573
Accrued liabilities	9,493	9,262
Deferred revenue	6,618	5,185
Total current liabilities	18,218	17,020
Deferred rent	1,288	1,448
Deferred revenue, net of current portion	2,102	840
Income tax liability	412	478
Total liabilities	22,020	19,786
Commitments and contingencies (Note 11)
Stockholders' equity:
Convertible preferred stock, $0.001 par value Authorized: 5,000,000 shares; none issued and outstanding	0	0
Common stock, $0.001 par value: Authorized: 50,000,000 shares; Issued and outstanding: 14,233,476 and 13,948,395 shares at December 31, 2012 and 2011, respectively	14	14
Additional paid-in capital	100,552	95,719
Accumulated deficit	(9,873)	(3,325)
Accumulated other comprehensive income (loss)	81	(841)
Total stockholders' equity	90,774	91,567
Total liabilities and stockholders' equity	$ 112,794	$ 111,353