CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 178,690	$ 134,137
Short-term marketable securities	232,398	94,451
Accounts receivable, net of allowance for doubtful accounts of $763 and $706 in 2019 and 2018, respectively	24,274	11,072
Inventories	90,380	80,857
Prepaid expenses and other current assets	15,597	11,915
Total current assets	541,339	332,432
PROPERTY AND EQUIPMENT, net	116,619	114,117
INTANGIBLE ASSETS, net	16,865	21,152
GOODWILL	91,849	91,849
DEFERRED TAX ASSETS	2,836	6,906
OTHER ASSETS	34,388	22,241
Total assets	803,896	588,697
CURRENT LIABILITIES:
Accounts payable	27,433	31,552
Accrued payroll and related expenses	13,408	12,131
Taxes payable	584	933
Other accrued liabilities	9,051	3,750
Total current liabilities	50,476	48,366
LONG-TERM INCOME TAXES PAYABLE	14,617	8,652
DEFERRED TAX LIABILITIES	164	216
OTHER LIABILITIES	14,093	4,391
Total liabilities	79,350	61,625
STOCKHOLDERS’ EQUITY:
Common stock, $0.001 par value Authorized - 140,000,000 shares Outstanding - 29,430,962 and 28,888,643 shares in 2019 and 2018, respectively	28	28
Additional paid-in capital	152,117	126,164
Accumulated other comprehensive loss	(3,130)	(1,689)
Retained earnings	575,531	402,569
Total stockholders’ equity	724,546	527,072
Total liabilities and stockholders’ equity	$ 803,896	$ 588,697