CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 251,325	$ 178,690
Short-term marketable securities	194,556	232,398
Accounts receivable, net	12,872	24,274
Inventories	103,963	90,380
Prepaid expenses and other current assets	14,512	15,597
Total current assets	577,228	541,339
PROPERTY AND EQUIPMENT, net	138,572	116,619
INTANGIBLE ASSETS, net	14,658	16,865
GOODWILL	91,849	91,849
DEFERRED TAX ASSETS	1,514	2,836
OTHER ASSETS	29,956	34,388
Total assets	853,777	803,896
CURRENT LIABILITIES:
Accounts payable	42,871	27,433
Accrued payroll and related expenses	14,365	13,408
Taxes payable	363	584
Other accrued liabilities	7,156	9,051
Total current liabilities	64,755	50,476
LONG-TERM INCOME TAXES PAYABLE	15,329	14,617
DEFERRED TAX LIABILITIES	121	164
OTHER LIABILITIES	14,100	14,093
Total liabilities	94,305	79,350
COMMITMENTS AND CONTINGENCIES (Notes 11, 12 and 13)
STOCKHOLDERS’ EQUITY:
Common stock	28	28
Additional paid-in capital	168,470	152,117
Accumulated other comprehensive loss	(1,720)	(3,130)
Retained earnings	592,694	575,531
Total stockholders’ equity	759,472	724,546
Total liabilities and stockholders’ equity	$ 853,777	$ 803,896