CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 14,020	$ 12,519
Marketable investments	74,666	77,484
Accounts receivable, net of allowance for doubtful accounts of $8 and $20, respectively	5,193	4,208
Inventories	10,729	6,448
Deferred tax asset	55	63
Other current assets and prepaid expenses	1,432	2,740
Total current assets	106,095	103,462
Property and equipment, net	853	597
Long-term investments	3,027	6,784
Intangibles, net	446	637
Deferred tax asset, net of current portion	446	325
Other long-term asset	486	0
Total assets	111,353	111,805
Current liabilities:
Accounts payable	2,573	1,296
Accrued liabilities	9,262	6,194
Deferred revenue	5,185	5,633
Total current liabilities	17,020	13,123
Deferred rent	1,448	1,501
Deferred revenue, net of current portion	840	1,287
Income tax liability	478	477
Total liabilities	19,786	16,388
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: 13,948,395 and 13,629,713 shares at December 31, 2011 and 2010, respectively	14	14
Additional paid-in capital	95,719	90,423
Retained earnings (accumulated deficit)	(3,325)	6,736
Accumulated other comprehensive loss	(841)	(1,756)
Total stockholders' equity	91,567	95,417
Total liabilities and stockholders' equity	$ 111,353	$ 111,805