Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating activities:
Consolidated net income	$ 118,596	$ 6,139	$ 53,600
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	20,786	18,626	17,240
Stock-based compensation expense	16,787	15,302	12,869
Loss on disposal of fixed assets	839	0	0
Provision for doubtful accounts	7	0	43
Deferred income taxes	(27,197)	6	(34)
Litigation-contingency expense	0	19,500	0
(Decrease) increase in long-term deferred revenue	0	(1,020)	875
Decrease (increase) in other assets	413	1,109	(192)
(Decrease) increase in long-term income taxes payable	(302)	1,159	1,366
Change in current assets and liabilities:
Accounts receivable	(7,764)	(483)	12,640
Inventories	14,712	457	(5,236)
Other current assets	(2,017)	(7,886)	(539)
Accounts payable and accrued liabilities	2,611	(1,845)	(11,151)
Accrued severance and other charges	1,489	(9)	9
Short-term lease liabilities	160	131	583
Income taxes payable	845	(684)	674
Deferred revenue and customer prepayments	(417)	340	(8,219)
Net cash provided by operating activities	139,548	50,842	74,528
Investing activities:
Additions to property, plant and equipment and internal-use software	(20,318)	(23,602)	(33,452)
Net cash used for investing activities	(20,318)	(23,602)	(33,452)
Financing activities:
Proceeds from employee stock plans	41,495	8,490	10,602
Repurchases of Common Stock	(35,175)	(497)	0
Net cash provided by financing activities	6,320	7,993	10,602
Effect of foreign exchange rates on cash	(18)	(179)	(70)
Net increase in cash and cash equivalents	125,532	35,054	51,608
Cash and cash equivalents at beginning of year	277,273	242,219	190,611
Cash and cash equivalents at end of year	402,805	277,273	242,219
Supplemental disclosures:
Cash paid during the year for income taxes, net of refunds	4,863	4,302	4,151
Purchases of property, plant and equipment and internal-use software incurred but not yet paid	$ 1,144	$ 1,946	$ 2,168