Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 90,860	$ 126,266
Short-term investments	144,103	112,452
Accounts receivable, net	30,830	25,630
Inventories	63,209	40,918
Prepaid expenses and other current assets	2,926	2,646
Total current assets	331,928	307,912
Property and equipment, net	65,359	62,942
Long-term investments	5,361	5,389
Goodwill	6,571	6,571
Acquisition-related intangible assets, net	5,053	6,812
Deferred tax assets, net	672	1,283
Other long-term assets	16,341	8,457
Total assets	431,285	399,366
Current liabilities:
Accounts payable	13,487	13,138
Accrued compensation and related benefits	9,812	9,020
Accrued liabilities	19,984	14,703
Total current liabilities	43,283	36,861
Income tax liabilities	2,941	5,876
Other long-term liabilities	16,545	10,204
Total liabilities	$ 62,769	$ 52,941
Commitments and contingencies (notes 11, 12 and 13)
Stockholders' equity:
Common stock and additional paid-in capital, $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 39,689 and 38,832 as of December 31, 2015 and December 31, 2014, respectively	$ 265,763	$ 240,500
Retained earnings	101,287	100,114
Accumulated other comprehensive income	1,466	5,811
Total stockholders’ equity	368,516	346,425
Total liabilities and stockholders’ equity	$ 431,285	$ 399,366