Note 17 - Restatement of Previously Issued Condensed Consolidated Financial Statements - Financial Statement Restatements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2025	Sep. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 1,081,251	$ 787,382	$ 637,354	$ 787,382	$ 1,081,251	$ 1,099,302	$ 691,816	$ 527,843
Short-term investments	188,233	358,695	389,310	358,695	188,233	157,243	171,130
Accounts receivable, net	241,560	194,821	214,866	194,821	241,560	255,626	172,518
Inventories	505,680	490,642	454,793	490,642	505,680	564,649	419,611
Other current assets	96,021	87,217	92,063	87,217	96,021	106,982	109,978
Total current assets	2,112,745	1,918,757	1,788,386	1,918,757	2,112,745	2,183,802	1,565,053
Property and equipment, net	597,311	563,885	527,348	563,885	597,311	627,689	494,945
Acquisition-related intangible assets, net	9,077	9,364	9,651	9,364	9,077	8,790	9,938
Goodwill	25,944	25,944	25,944	25,944	25,944	25,944	25,944
Deferred tax assets, net	1,201,090	1,210,033	1,217,840	1,210,033	1,201,090	1,182,883	1,225,565
Other long-term assets	161,055	144,279	135,974	144,279	161,055	165,091	194,377
Total assets	4,107,222	3,872,262	3,705,143	3,872,262	4,107,222	4,194,199	3,515,822
Liabilities, Current [Abstract]
Accounts payable	141,689	129,919	127,310	129,919	141,689	138,272	102,526
Accrued compensation and related benefits	99,602	81,296	74,785	81,296	99,602	85,963	63,918
Other accrued liabilities	201,513	172,293	161,306	172,293	201,513	145,130	128,123
Total current liabilities	442,804	383,508	363,401	383,508	442,804	369,365	294,567
Income tax liabilities	78,261	73,185	69,535	73,185	78,261	75,022	65,193
Deferred tax liabilities	91,436	92,150	92,764	92,150	91,436	90,480	93,367
Other long-term liabilities	117,380	113,449	105,814	113,449	117,380	127,835	111,570
Total liabilities	729,881	662,292	631,514	662,292	729,881	662,702	564,697
Stockholders’ equity:
Common stock and additional paid-in capital: $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 47,877 and 47,823, respectively	885,123	822,582	764,959	822,582	885,123	936,998	706,817
Retained earnings	2,514,921	2,411,079	2,351,994	2,411,079	2,514,921	2,609,651	2,292,819
Accumulated other comprehensive loss	(22,703)	(23,691)	(43,324)	(23,691)	(22,703)	(15,152)	(48,511)
Total stockholders’ equity	3,377,341	3,209,970	3,073,629	3,209,970	3,377,341	3,531,497	2,951,125	2,049,939
Total liabilities and stockholders’ equity	4,107,222	3,872,262	3,705,143	3,872,262	4,107,222	4,194,199	3,515,822
Revenue	737,176	664,574	637,554	1,302,128	2,039,304	2,790,459	2,207,100	1,821,072
Cost of revenue	330,948	298,558	284,324	582,882	913,830	1,250,718	986,230	799,953
Gross profit	406,228	366,016	353,230	719,246	1,125,474	1,539,741	1,220,870	1,021,119
Operating expenses:
Research and development	98,173	96,266	92,227	188,493	286,666	382,263	324,748	263,643
Selling, general and administrative	112,872	104,992	92,244	197,236	310,108	428,842	356,764	275,740
Total operating expenses	211,045	201,258	184,471	385,729	596,774	811,105	681,512	539,383
Operating income	195,183	164,758	168,759	333,517	528,700	728,636	539,358	481,736
Other income, net	10,392	12,220	5,131	17,351	27,743	37,580	33,554	24,105
Income before income taxes	205,575	176,978	173,890	350,868	556,443	766,216	572,912	505,841
Income tax benefit, net	25,809	41,969	38,838	80,807	106,616	144,733	(1,019,146)	78,467
Net income	$ 179,766	$ 135,009	$ 135,052	$ 270,061	$ 449,827	$ 621,483	$ 1,592,058	$ 427,374
Net income per share:
Basic (in dollars per share)	$ 3.75	$ 2.82	$ 2.82	$ 5.64	$ 9.4	$ 12.94	$ 32.76	$ 8.98
Diluted (in dollars per share)	$ 3.74	$ 2.81	$ 2.81	$ 5.62	$ 9.37	$ 12.86	$ 32.6	$ 8.76
Weighted-average shares outstanding:
Basic (in shares)	47,898,000	47,887,000	47,851,000	47,869,000	47,879,000	48,035,000	48,599,000	47,610,000
Diluted (in shares)	48,042,000	48,019,000	48,006,000	48,012,000	48,022,000	48,309,000	48,835,000	48,771,000
Net income	$ 179,766	$ 135,009	$ 135,052	$ 270,061	$ 449,827	$ 621,483	$ 1,592,058	$ 427,374
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	919	19,634	5,139	24,773	25,692	33,576	(22,843)	(9,528)
Change in unrealized gains and losses on available-for-sale securities, net of tax of $285, $(153) and $1,352, respectively	69	(1)	48	47	116	(217)	1,394	5,543
Other comprehensive income, net of tax	988	19,633	5,187	24,820	25,808	33,359	(21,449)	(3,985)
Comprehensive income	180,754	154,642	140,239	294,881	475,635	654,842	1,570,609	423,389
Balance	3,209,970	3,073,629	2,951,125	2,951,125	2,951,125	2,951,125	2,049,939	1,668,602
Net income	179,766	135,009	135,052	270,061	449,827	621,483	1,592,058	427,374
Dividends and dividend equivalents declared	(75,924)	(75,924)	(75,877)			(304,651)	(246,303)	(196,713)
Common stock issued	3,885	0	5,335			9,220	8,727	8,686
Stock-based compensation expense	60,673	60,107	52,807			$ 227,444	$ 205,631	$ 149,716
Repurchases of common stock (in shares)						(8,000)	(1,000,000)	(7,000)
Repurchases of common stock	(2,017)	(2,484)				$ (6,483)	$ (637,478)	$ (3,741)
Balance	3,377,341	3,209,970	3,073,629	3,209,970	3,377,341	3,531,497	2,951,125	2,049,939
Common Stock Including Additional Paid in Capital [Member]
Stockholders’ equity:
Total stockholders’ equity	885,123	822,582	764,959	$ 822,582	$ 885,123	936,998	706,817	1,129,937
Operating expenses:
Net income	0	0	0			0	0	0
Weighted-average shares outstanding:
Net income	0	0	0			0	0	0
Other comprehensive income (loss), net of tax:
Other comprehensive income, net of tax	$ 0	$ 0	$ 0			$ 0	$ 0	$ 0
Balance (in shares)	47,892,000	47,877,000	47,823,000	47,823,000	47,823,000	47,823,000	48,028,000	47,107,000
Balance	$ 822,582	$ 764,959	$ 706,817	$ 706,817	$ 706,817	$ 706,817	$ 1,129,937	$ 975,276
Net income	0	0	0			0	0	0
Dividends and dividend equivalents declared	$ 0	$ 0	$ 0			$ 0	$ 0	$ 0
Common stock issued (in shares)	15,000	19,000	54,000			894,000	796,000	928,000
Common stock issued	$ 3,885	$ 0	$ 5,335			$ 9,220	$ 8,727	$ 8,686
Stock-based compensation expense	$ 60,673	$ 60,107	$ 52,807			$ 227,444	$ 205,631	$ 149,716
Repurchases of common stock (in shares)	(2,000)	(4,000)				(8,000)	(1,001,000)	(7,000)
Repurchases of common stock	$ (2,017)	$ (2,484)				$ (6,483)	$ (637,478)	$ (3,741)
Balance (in shares)	47,905,000	47,892,000	47,877,000	47,892,000	47,905,000	48,709,000	47,823,000	48,028,000
Balance	$ 885,123	$ 822,582	$ 764,959	$ 822,582	$ 885,123	$ 936,998	$ 706,817	$ 1,129,937
Retained Earnings [Member]
Stockholders’ equity:
Total stockholders’ equity	2,514,921	2,411,079	2,351,994	2,411,079	2,514,921	2,609,651	2,292,819	947,064
Operating expenses:
Net income	179,766	135,009	135,052			621,483	1,592,058	427,374
Weighted-average shares outstanding:
Net income	179,766	135,009	135,052			621,483	1,592,058	427,374
Other comprehensive income (loss), net of tax:
Other comprehensive income, net of tax	0	0	0			0	0	0
Balance	2,411,079	2,351,994	2,292,819	2,292,819	2,292,819	2,292,819	947,064	716,403
Net income	179,766	135,009	135,052			621,483	1,592,058	427,374
Dividends and dividend equivalents declared	(75,924)	(75,924)	(75,877)			(304,651)	(246,303)	(196,713)
Common stock issued	0	0	0			0	0	0
Stock-based compensation expense	0	0	0			0	0	0
Repurchases of common stock	0	0				0	0	0
Balance	2,514,921	2,411,079	2,351,994	2,411,079	2,514,921	2,609,651	2,292,819	947,064
AOCI Attributable to Parent [Member]
Stockholders’ equity:
Total stockholders’ equity	(22,703)	(23,691)	(43,324)	(23,691)	(22,703)	(15,152)	(48,511)	(27,062)
Operating expenses:
Net income	0	0	0			0	0	0
Weighted-average shares outstanding:
Net income	0	0	0			0	0	0
Other comprehensive income (loss), net of tax:
Other comprehensive income, net of tax	988	19,633	5,187			33,359	(21,449)	(3,985)
Balance	(23,691)	(43,324)	(48,511)	(48,511)	(48,511)	(48,511)	(27,062)	(23,077)
Net income	0	0	0			0	0	0
Dividends and dividend equivalents declared	0	0	0			0	0	0
Common stock issued	0	0	0			0	0	0
Stock-based compensation expense	0	0	0			0	0	0
Repurchases of common stock	0	0				0	0	0
Balance	(22,703)	(23,691)	(43,324)	(23,691)	(22,703)	(15,152)	(48,511)	$ (27,062)
Previously Reported [Member]
Current assets:
Cash and cash equivalents	1,081,251	787,382	637,354	787,382	1,081,251
Short-term investments	188,233	358,695	389,310	358,695	188,233
Accounts receivable, net	241,560	194,821	214,866	194,821	241,560
Inventories	505,680	490,642	454,793	490,642	505,680
Other current assets	96,021	87,217	92,063	87,217	96,021
Total current assets	2,112,745	1,918,757	1,788,386	1,918,757	2,112,745
Property and equipment, net	597,311	563,885	527,348	563,885	597,311
Acquisition-related intangible assets, net	9,077	9,364	9,651	9,364	9,077
Goodwill	25,944	25,944	25,944	25,944	25,944
Deferred tax assets, net	1,300,260	1,309,981	1,318,457	1,309,981	1,300,260		1,326,840
Other long-term assets	161,055	144,279	135,974	144,279	161,055
Total assets	4,206,392	3,972,210	3,805,760	3,972,210	4,206,392		3,617,097
Liabilities, Current [Abstract]
Accounts payable	141,689	129,919	127,310	129,919	141,689
Accrued compensation and related benefits	99,602	81,296	74,785	81,296	99,602
Other accrued liabilities	201,513	172,293	161,306	172,293	201,513
Total current liabilities	442,804	383,508	363,401	383,508	442,804
Income tax liabilities	78,261	73,185	69,535	73,185	78,261
Deferred tax liabilities	0	0	0	0	0		0
Other long-term liabilities	117,380	113,449	105,814	113,449	117,380
Total liabilities	638,445	570,142	538,750	570,142	638,445		471,330
Stockholders’ equity:
Common stock and additional paid-in capital: $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 47,877 and 47,823, respectively	885,123	822,582	764,959	822,582	885,123
Retained earnings	2,705,527	2,603,177	2,545,375	2,603,177	2,705,527		2,487,461
Accumulated other comprehensive loss	(22,703)	(23,691)	(43,324)	(23,691)	(22,703)
Total stockholders’ equity	3,567,947	3,402,068	3,267,010	3,402,068	3,567,947		3,145,767
Total liabilities and stockholders’ equity	4,206,392	3,972,210	3,805,760	3,972,210	4,206,392		3,617,097
Revenue	737,176	664,574	637,554	1,302,128	2,039,304
Cost of revenue	330,948	298,558	284,324	582,882	913,830
Gross profit	406,228	366,016	353,230	719,246	1,125,474
Operating expenses:
Research and development	98,173	96,266	92,227	188,493	286,666
Selling, general and administrative	112,872	104,992	92,244	197,236	310,108
Total operating expenses	211,045	201,258	184,471	385,729	596,774
Operating income	195,183	164,758	168,759	333,517	528,700
Other income, net	10,392	12,220	5,131	17,351	27,743
Income before income taxes	205,575	176,978	173,890	350,868	556,443
Income tax benefit, net	27,301	43,252	40,099	83,351	110,652		(1,213,788)
Net income	$ 178,274	$ 133,726	$ 133,791	$ 267,517	$ 445,791		$ 1,786,700
Net income per share:
Basic (in dollars per share)	$ 3.72	$ 2.79	$ 2.8	$ 5.59	$ 9.31		$ 36.76
Diluted (in dollars per share)	$ 3.71	$ 2.78	$ 2.79	$ 5.57	$ 9.28		$ 36.59
Weighted-average shares outstanding:
Basic (in shares)	47,898,000	47,887,000	47,851,000	47,869,000	47,879,000
Diluted (in shares)	48,042,000	48,019,000	48,006,000	48,012,000	48,022,000
Net income	$ 178,274	$ 133,726	$ 133,791	$ 267,517	$ 445,791		$ 1,786,700
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	919	19,634	5,139	24,773	25,692
Change in unrealized gains and losses on available-for-sale securities, net of tax of $285, $(153) and $1,352, respectively	69	(1)	48	47	116
Other comprehensive income, net of tax	988	19,633	5,187	24,820	25,808
Comprehensive income	179,262	153,359	138,978	292,337	471,599		1,765,251
Balance	3,402,068	3,267,010	3,145,767	3,145,767	3,145,767	3,145,767
Net income	178,274	133,726	133,791	267,517	445,791		1,786,700
Balance	3,567,947	3,402,068	3,267,010	3,402,068	3,567,947		3,145,767
Previously Reported [Member] | Retained Earnings [Member]
Stockholders’ equity:
Total stockholders’ equity							2,487,461
Operating expenses:
Net income							1,786,700
Weighted-average shares outstanding:
Net income							1,786,700
Other comprehensive income (loss), net of tax:
Balance			2,487,461	2,487,461	2,487,461	2,487,461
Net income							1,786,700
Balance							2,487,461
Revision of Prior Period, Error Correction, Adjustment [Member]
Current assets:
Cash and cash equivalents	0	0	0	0	0
Short-term investments	0	0	0	0	0
Accounts receivable, net	0	0	0	0	0
Inventories	0	0	0	0	0
Other current assets	0	0	0	0	0
Total current assets	0	0	0	0	0
Property and equipment, net	0	0	0	0	0
Acquisition-related intangible assets, net	0	0	0	0	0
Goodwill	0	0	0	0	0
Deferred tax assets, net	(99,170)	(99,948)	(100,617)	(99,948)	(99,170)		(101,275)
Other long-term assets	0	0	0	0	0
Total assets	(99,170)	(99,948)	(100,617)	(99,948)	(99,170)		(101,275)
Liabilities, Current [Abstract]
Accounts payable	0	0	0	0	0
Accrued compensation and related benefits	0	0	0	0	0
Other accrued liabilities	0	0	0	0	0
Total current liabilities	0	0	0	0	0
Income tax liabilities	0	0	0	0	0
Deferred tax liabilities	91,436	92,150	92,764	92,150	91,436		93,367
Other long-term liabilities	0	0	0	0	0
Total liabilities	91,436	92,150	92,764	92,150	91,436		93,367
Stockholders’ equity:
Common stock and additional paid-in capital: $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 47,877 and 47,823, respectively	0	0	0	0	0
Retained earnings	(190,606)	(192,098)	(193,381)	(192,098)	(190,606)		(194,642)
Accumulated other comprehensive loss	0	0	0	0	0
Total stockholders’ equity	(190,606)	(192,098)	(193,381)	(192,098)	(190,606)		(194,642)
Total liabilities and stockholders’ equity	(99,170)	(99,948)	(100,617)	(99,948)	(99,170)		(101,275)
Revenue	0	0	0	0	0
Cost of revenue	0	0	0	0	0
Gross profit	0	0	0	0	0
Operating expenses:
Research and development	0	0	0	0	0
Selling, general and administrative	0	0	0	0	0
Total operating expenses	0	0	0	0	0
Operating income	0	0	0	0	0
Other income, net	0	0	0	0	0
Income before income taxes	0	0	0	0	0
Income tax benefit, net	(1,492)	(1,283)	(1,261)	(2,544)	(4,036)		194,642
Net income	$ 1,492	$ 1,283	$ 1,261	$ 2,544	$ 4,036		$ (194,642)
Net income per share:
Basic (in dollars per share)	$ 0.03	$ 0.03	$ 0.02	$ 0.05	$ 0.09		$ (4)
Diluted (in dollars per share)	$ 0.03	$ 0.03	$ 0.02	$ 0.05	$ 0.09		$ (3.99)
Weighted-average shares outstanding:
Basic (in shares)	0	0	0	0	0
Diluted (in shares)	0	0	0	0	0
Net income	$ 1,492	$ 1,283	$ 1,261	$ 2,544	$ 4,036		$ (194,642)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	0	0	0	0	0
Change in unrealized gains and losses on available-for-sale securities, net of tax of $285, $(153) and $1,352, respectively	0	0	0	0	0
Other comprehensive income, net of tax	0	0	0	0	0
Comprehensive income	1,492	1,283	1,261	2,544	4,036		(194,642)
Balance	(192,098)	(193,381)	(194,642)	(194,642)	(194,642)	(194,642)
Net income	1,492	1,283	1,261	2,544	4,036		(194,642)
Balance	$ (190,606)	$ (192,098)	(193,381)	(192,098)	(190,606)		(194,642)
Revision of Prior Period, Error Correction, Adjustment [Member] | Retained Earnings [Member]
Stockholders’ equity:
Total stockholders’ equity							(194,642)
Operating expenses:
Net income							(194,642)
Weighted-average shares outstanding:
Net income							(194,642)
Other comprehensive income (loss), net of tax:
Balance			$ (194,642)	$ (194,642)	$ (194,642)	$ (194,642)
Net income							(194,642)
Balance							$ (194,642)