CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 232,014	$ 178,690
Short-term marketable securities	211,926	232,398
Accounts receivable, net	29,447	24,274
Inventories	104,805	90,380
Prepaid expenses and other current assets	14,755	15,597
Total current assets	592,947	541,339
PROPERTY AND EQUIPMENT, net	147,719	116,619
INTANGIBLE ASSETS, net	13,582	16,865
GOODWILL	91,849	91,849
DEFERRED TAX ASSETS	2,660	2,836
OTHER ASSETS	27,311	34,388
Total assets	876,068	803,896
CURRENT LIABILITIES:
Accounts payable	43,623	27,433
Accrued payroll and related expenses	12,892	13,408
Taxes payable	379	584
Other accrued liabilities	9,357	9,051
Total current liabilities	66,251	50,476
LONG-TERM INCOME TAXES PAYABLE	15,497	14,617
DEFERRED TAX LIABILITIES	87	164
OTHER LIABILITIES	14,436	14,093
Total liabilities	96,271	79,350
STOCKHOLDERS’ EQUITY:
Common stock	28	28
Additional paid-in capital	181,192	152,117
Accumulated other comprehensive loss	(2,355)	(3,130)
Retained earnings	600,932	575,531
Total stockholders’ equity	779,797	724,546
Total liabilities and stockholders’ equity	$ 876,068	$ 803,896