Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 76,616	$ 126,266
Short-term investments	153,047	112,452
Accounts receivable, net	30,475	25,630
Inventories	67,309	40,918
Prepaid expenses and other current assets	2,521	2,880
Total current assets	329,968	308,146
Property and equipment, net	60,088	62,942
Long-term investments	5,364	5,389
Goodwill	6,571	6,571
Acquisition-related intangible assets, net	5,566	6,812
Deferred tax assets, net	1,031	1,049
Other long-term assets	11,491	8,457
Total assets	420,079	399,366
Current liabilities:
Accounts payable	15,661	13,138
Accrued compensation and related benefits	14,256	9,020
Accrued liabilities	18,703	14,703
Total current liabilities	48,620	36,861
Deferred tax and other tax liabilities	3,229	5,876
Other long-term liabilities	14,117	10,204
Total liabilities	65,966	52,941
Stockholders' equity:
Common stock, $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 39,503 and 38,832 as of September 30, 2015 and December 31, 2014, respectively	251,298	240,500
Retained earnings	99,731	100,114
Accumulated other comprehensive income	3,084	5,811
Total stockholders’ equity	354,113	346,425
Total liabilities and stockholders’ equity	$ 420,079	$ 399,366