CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 10,159	$ 8,803
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	14,246	17,106
Amortization of intangibles	415	863
Loss on disposal of property and equipment	0	8
Stock-based compensation expense	18,760	17,449
Accretion of discount on marketable securities	(721)	(909)
Deferred income taxes	(854)	(3,482)
Increase (decrease) in accounts receivable allowance for credit losses	(381)	326
Change in operating assets and liabilities:
Accounts receivable	(30)	(2,024)
Inventories	(2,784)	(6,720)
Prepaid expenses and other assets	6,405	2,072
Accounts payable	248	(117)
Taxes payable and accrued liabilities	9,995	161
Net cash provided by operating activities	55,458	33,536
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(11,652)	(8,510)
Purchases of marketable securities	(47,696)	(77,830)
Proceeds from sales and maturities of marketable securities	96,492	85,392
Net cash provided by (used in) investing activities	37,144	(948)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock under employee stock plans	2,787	2,691
Repurchase of common stock	(55,658)	(25,979)
Payments of dividends to stockholders	(23,768)	(22,736)
Proceeds from draw on line of credit	13,000	0
Payments on line of credit	(13,000)	0
Net cash used in financing activities	(76,639)	(46,024)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	15,963	(13,436)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	50,972	63,929
CASH AND CASH EQUIVALENTS AT END OF PERIOD	66,935	50,493
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Unpaid property and equipment	3,700	1,306
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for income taxes, net	$ 2,690	$ 4,498