Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 260,604	$ 189,265
Short-term investments	512,908	535,817
Accounts receivable, net	120,318	104,813
Inventories	311,040	259,417
Other current assets	42,266	35,540
Total current assets	1,247,136	1,124,852
Property and equipment, net	369,374	362,962
Goodwill	6,571	6,571
Deferred tax assets, net	22,848	21,917
Other long-term assets	68,052	69,523
Total assets	1,713,981	1,585,825
Current liabilities:
Accounts payable	71,572	83,027
Accrued compensation and related benefits	89,869	62,635
Other accrued liabilities	111,087	81,282
Total current liabilities	272,528	226,944
Income tax liabilities	49,782	47,669
Other long-term liabilities	65,559	67,227
Total liabilities	387,869	341,840
Commitments and contingencies
Stockholders’ equity:
Common stock and additional paid-in capital: $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 46,625 and 46,256, respectively	847,966	803,226
Retained earnings	467,844	424,879
Accumulated other comprehensive income	10,302	15,880
Total stockholders’ equity	1,326,112	1,243,985
Total liabilities and stockholders’ equity	$ 1,713,981	$ 1,585,825