Monolithic Power Systems (MPWR) 10-Q 2 Nov 18 2018 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 29, 2018
Document Information [Line Items]
Entity Registrant Name	MONOLITHIC POWER SYSTEMS INC
Entity Central Index Key	1,280,452
Trading Symbol	mpwr
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding (in shares)		42,412,000
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 131,094	$ 82,759
Short-term investments	216,754	216,331
Accounts receivable	59,887	38,037
Inventories	136,790	99,281
Other current assets	12,876	12,762
Total current assets	557,401	449,170
Property and equipment, net	147,497	144,636
Long-term investments	5,257	5,256
Goodwill	6,571	6,571
Acquisition-related intangible assets, net	308	951
Deferred tax assets, net	12,852	15,917
Other long-term assets	33,271	30,068
Total assets	763,157	652,569
Current liabilities:
Accounts payable	27,603	22,813
Accrued compensation and related benefits	22,996	15,597
Accrued liabilities	34,908	27,507
Total current liabilities	85,507	65,917
Income tax liabilities	31,173	31,621
Other long-term liabilities	36,313	33,024
Total liabilities	152,993	130,562
Commitments and contingencies
Stockholders' equity:
Common stock and additional paid-in capital, $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 42,408 and 41,614, respectively	435,085	376,586
Retained earnings	180,819	143,608
Accumulated other comprehensive income (loss)	(5,740)	1,813
Total stockholders’ equity	610,164	522,007
Total liabilities and stockholders’ equity	$ 763,157	$ 652,569

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares shares in Thousands	Sep. 30, 2018	Dec. 31, 2017
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	150,000	150,000
Common stock, shares issued (in shares)	42,408	41,614
Common stock, shares outstanding (in shares)	42,408	41,614

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Revenue	$ 159,975	$ 128,939	[1]	$ 428,885	$ 341,499	[1]
Cost of revenue	70,957	58,083		190,810	154,377
Gross profit	89,018	70,856		238,075	187,122
Operating expenses:
Research and development	25,630	21,442		70,720	60,629
Selling, general and administrative	29,552	25,255		85,431	73,219
Litigation expense	343	327		1,513	903
Total operating expenses	55,525	47,024		157,664	134,751
Income from operations	33,493	23,832		80,411	52,371
Interest and other income, net	2,714	1,255		5,387	3,873
Income before income taxes	36,207	25,087		85,798	56,244
Income tax provision	4,639	1,445		8,168	3,112
Net income	$ 31,568	$ 23,642		$ 77,630	$ 53,132
Net income per share:
Basic (in dollars per share)	$ 0.75	$ 0.57		$ 1.84	$ 1.29
Diluted (in dollars per share)	$ 0.71	$ 0.54		$ 1.75	$ 1.22
Weighted-average shares outstanding:
Basic (in shares)	42,362	41,458		42,173	41,276
Diluted (in shares)	44,669	43,486		44,450	43,384
Cash dividends declared per common share (in dollars per share)	$ 0.30	$ 0.20		$ 0.90	$ 0.60
[1]	2017 amounts have not been adjusted under the modified retrospective method.

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net income	$ 31,568	$ 23,642	$ 77,630	$ 53,132
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(4,526)	1,500	(6,999)	3,992
Change in unrealized gain (loss) on available-for-sale securities, net of tax of $241, $0, $241, 0, respectively	491	222	(554)	565
Total other comprehensive income (loss), net of tax	(4,035)	1,722	(7,553)	4,557
Comprehensive income	$ 27,533	$ 25,364	$ 70,077	$ 57,689

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Change in unrealized gain (loss) on available-for-sale securities, tax	$ 241	$ 0	$ 241	$ 0

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 77,630	$ 53,132
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of intangible assets	9,058	12,092
Amortization of premium on available-for-sale securities	1,122	1,494
Gain on deferred compensation plan investments	(949)	(1,902)
Stock-based compensation expense	45,765	40,759
Deferred taxes, net	3,169
Changes in operating assets and liabilities:
Accounts receivable	(22,752)	(16,505)
Inventories	(37,496)	(28,384)
Other assets	(665)	1,696
Accounts payable	5,978	4,999
Accrued compensation and related benefits	7,838	4,542
Accrued liabilities	4,635	7,276
Income tax liabilities	528	1,249
Net cash provided by operating activities	93,861	80,448
Cash flows from investing activities:
Property and equipment purchases	(18,057)	(25,108)
Purchases of short-term investments	(86,021)	(102,274)
Proceeds from maturities and sales of short-term investments	83,679	61,678
Contributions to deferred compensation plan, net	(1,396)	(2,124)
Net cash used in investing activities	(21,795)	(67,828)
Cash flows from financing activities:
Property and equipment purchased on extended payment terms		(250)
Proceeds from exercise of stock options	59	129
Proceeds from vesting of restricted stock units	9,625
Proceeds from shares issued under the employee stock purchase plan	3,028	2,701
Dividends and dividend equivalents paid	(34,381)	(25,264)
Net cash used in financing activities	(21,669)	(22,684)
Effect of change in exchange rates	(2,062)	1,790
Net increase (decrease) in cash, cash equivalents and restricted cash	48,335	(8,274)
Cash, cash equivalents and restricted cash, beginning of period	82,874	112,813
Cash, cash equivalents and restricted cash, end of period	131,209	104,539
Supplemental disclosures:
Cash paid for taxes and interest	6,388	1,855
Non-cash investing and financing activities:
Liability accrued for property and equipment purchases	1,563	284
Liability accrued for dividends and dividend equivalents	$ 15,397	$ 10,131

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. The accompanying unaudited condensed consolidated financial statements have been prepared by Monolithic Power Systems, Inc. (the “Company” or “MPS”) in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) have been condensed or omitted in accordance with these accounting principles, rules and regulations. The information in this report should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Annual Report on Form 10 December 31, 2017, March 1, 2018. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments) necessary to present fairly the Company’s financial position, results of operations and cash flows for the interim periods presented. The financial statements contained in this Form 10 not may December 31, 2018 Summary of Significant Accounting Policies Except for the changes related to revenue recognition discussed in “Recently Adopted Accounting Pronouncements” and in Note 2 no three nine September 30, 2018 10 December 31, 2017. Recently Adopted Accounting Pronouncements In May 2014, No. 2014 09, Revenue from Contracts with Customers (Topic 606 January 1, 2018 not December 31, 2017. January 1, 2018 606, not 605, Revenue Recognition The Company recorded a net increase to the opening balance of retained earnings of $0.4 January 1, 2018 606, three 606, 606, January 1, 2018, 2 In November 2016, No. 2016 18, Statement of Cash Flows - Restricted Cash (Topic 230 January 1, 2018 9 Recent Accounting Pronounce ments Not September 30, 2018 In August 2018, No. 33 10532, Disclosure Update and Simplification, November 5, 2018. In August 2018, No. 2018 13, Fair Value Measurement (Topic 82 0 ) : Disclosure Framework — Changes to the Disclosure Requirements for Fair Value Measurement , 3 December 15, 2019. In January 2017, No. 2017 04, Intangibles – Goodwill and Other (Topic 350 two not December 15, 2019. In June 2016, No. 2016 13, Financial Instruments – Credit Losses (Topic 326 December 15, 2019, December 15, 2018. In February 2016, No. 2016 02, Leases (Topic 842 12 December 15, 2018, January 1, 2019. no

Note 2 - Revenue Recognition

Note 2 - Revenue Recognition	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	2. Revenue from Product Sales The following table presents the Company’s revenue disaggregated by end market (in thousands, except for percentages): Three Months Ended September 30, Nine Months Ended September 30, End Market 2018 % of Revenue 2017 % of Revenue 2018 % of Revenue 2017 % of Revenue Computing and storage $ 47,658 29.8 % $ 29,020 22.5 % $ 115,584 27.0 % $ 74,103 21.7 % Automotive 19,785 12.4 12,857 10.0 57,857 13.5 38,042 11.1 Industrial 24,869 15.5 16,348 12.7 61,544 14.3 46,736 13.7 Communications 19,158 12.0 15,372 11.9 50,442 11.8 47,748 14.0 Consumer 48,505 30.3 55,342 42.9 143,458 33.4 134,870 39.5 Total $ 159,975 100.0 % $ 128,939 100.0 % $ 428,885 100.0 % $ 341,499 100.0 % _____________ ( 1 2017 not The Company generates revenue primarily from product sales, which include assembled and tested integrated circuits, as well as dies in wafer form. The Company also generates royalty revenue from licensing arrangements and revenue from wafer testing services performed for third not The Company sells its products primarily through third three September 30, 2018 2017, 87% 88%, nine September 30, 2018 2017, 87% 88%, not Under Topic 606, Product sales consist of a single performance obligation that the Company satisfies at a point in time. The Company recognizes product revenue from distributors and direct end customers when the following events have occurred: (a) the Company has transferred physical possession of the products, (b) the Company has a present right to payment, (c) the customer has legal title to the products, and (d) the customer bears significant risks and rewards of ownership of the products. In accordance with the shipping terms specified in the contracts, these criteria are generally met when the products are shipped from the Company’s facilities (such as the “Ex Works” shipping term) or delivered to the customers’ locations (such as the “Delivered Duty Paid” shipping term). Under certain consignment agreements, revenue is not not 60 Variable Consideration The Company records variable consideration as a reduction to revenue in the same period the revenue is recognized. Three U.S.-based distributors have price adjustment rights when they sell the Company’s products to their end customers at a price that is lower than the distribution price invoiced by the Company. When the Company receives claims from the distributors that products have been sold to the end customers at the lower price, the Company issues the distributors credit memos for the price adjustments. The Company estimates the price adjustments based on analyses of historical claims, at both the distributor and product level, as well as an assessment of any known trends of product sales mix. Other U.S. distributors and non-U.S. distributors, which make up the majority of the Company’s total sales to distributors, do not In addition, certain distributors have limited stock rotation rights that permit the return of a small percentage of the previous six Contract Balances The Company records a receivable when it has an unconditional right to receive consideration after the performance obligations are satisfied. As of September 30, 2018 December 31, 2017, $59.9 $38.0 not For certain customers located in Asia, the Company requires cash payments two September 30, 2018 December 31, 2017, $1.8 $4.7 nine September 30, 2018 nine September 30, 2018, $4.7 December 31, 2017. Contract Costs Warranty The Company generally provides one two no not Practical Expedients The Company’s standard payment terms generally require customers to pay 30 60 one not As of September 30, 2018, not one not Changes to Financial Statement Line Items The following tables compare the impact on the financial statement line items between the application of Topic 606 605 September 30, 2018, three nine September 30, 2018. two ● Under Topic 606, three 605, ● Under Topic 606, 605, ● Under Topic 606, 605, not Condensed Consolidated Balance Sheet (in thousands): September 30, 2018 Topic 606 Line Item (As Reported) Topic 605 Difference Assets: Accounts receivable $ 59,887 $ 61,430 $ (1,543 ) Inventories $ 136,790 $ 137,129 $ (339 ) Other current assets $ 12,876 $ 10,556 $ 2,320 Total current assets $ 557,401 $ 556,963 $ 438 Deferred tax assets, net $ 12,852 $ 12,953 $ (101 ) Total assets $ 763,157 $ 762,820 $ 337 Liabilities and Stockholders' Equity: Accrued liabilities $ 34,908 $ 35,190 $ (282 ) Total current liabilities $ 85,507 $ 85,789 $ (282 ) Total liabilities $ 152,993 $ 153,275 $ (282 ) Retained earnings $ 180,819 $ 180,200 $ 619 Total stockholders' equity $ 610,164 $ 609,545 $ 619 Total liabilities and stockholders' equity $ 763,157 $ 762,820 $ 337 Condensed Consolidated Statement of Operations (in thousands, except per-share amounts): Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Topic 606 Topic 606 Line Item (As Reported) Topic 605 Difference (As Reported) Topic 605 Difference Revenue $ 159,975 $ 159,723 $ 252 $ 428,885 $ 428,440 $ 445 Cost of revenue $ 70,957 $ 70,848 $ 109 $ 190,810 $ 190,668 $ 142 Gross profit $ 89,018 $ 88,875 $ 143 $ 238,075 $ 237,772 $ 303 Income from operations $ 33,493 $ 33,350 $ 143 $ 80,411 $ 80,108 $ 303 Income before income taxes $ 36,207 $ 36,064 $ 143 $ 85,798 $ 85,495 $ 303 Income tax provision $ 4,639 $ 4,609 $ 30 $ 8,168 $ 8,104 $ 64 Net income $ 31,568 $ 31,455 $ 113 $ 77,630 $ 77,391 $ 239 Net income per share - basic $ 0.75 $ 0.74 $ 0.01 $ 1.84 $ 1.84 $ - Net income per share - diluted $ 0.71 $ 0.70 $ 0.01 $ 1.75 $ 1.74 $ 0.01 Condensed Consolidated Statement of Comprehensive Income (in thousands): Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Topic 606 Topic 606 Line Item (As Reported) Topic 605 Difference (As Reported) Topic 605 Difference Net income $ 31,568 $ 31,455 $ 113 $ 77,630 $ 77,391 $ 239 Comprehensive income $ 27,533 $ 27,420 $ 113 $ 70,077 $ 69,838 $ 239 Condensed Consolidated Statement of Cash Flows (in thousands): Nine Months Ended September 30, 2018 Topic 606 Line Item (As Reported) Topic 605 Difference Cash flows from operating activities: Net income $ 77,630 $ 77,391 $ 239 Changes in operating assets and liabilities: Accounts receivable $ (22,752 ) $ (23,394 ) $ 642 Inventories $ (37,496 ) $ (37,835 ) $ 339 Other assets $ (665 ) $ 1,563 $ (2,228 ) Accrued liabilities $ 4,635 $ 3,691 $ 944 Income tax liabilities $ 528 $ 464 $ 64

Note 3 - Stock-based Compensati

Note 3 - Stock-based Compensation	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	3. 2014 “2014 The Board of Directors adopted the 2014 April 2013, June 2013. October 2014, 2014 2014 November 13, 2014 5.5 2014 November 13, 2024. September 30, 2018, 2.7 2014 Stock-Based Compensation Expense The Company recognized stock-based compensation expenses as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Cost of revenue $ 471 $ 453 $ 1,384 $ 1,264 Research and development 3,979 3,838 12,168 11,297 Selling, general and administrative 10,393 9,678 32,213 28,198 Total stock-based compensation expense $ 14,843 $ 13,969 $ 45,765 $ 40,759 Tax benefit related to stock-based compensation $ 764 $ - $ 2,723 $ - Restricted Stock Units The Company’s restricted stock units (“RSUs”) include time-based RSUs, RSUs with only performance conditions (“PSUs”), RSUs with both market and performance conditions (“MPSUs”), and RSUs with only market conditions (“MSUs”). Vesting of all awards requires continued service for the Company. In addition, vesting of awards with performance conditions or market conditions is subject to the achievement of pre-determined performance goals. A summary of RSU activity is presented in the table below (in thousands, except per-share amounts): Time-Based RSUs PSUs and MPSUs MSUs Total Number of Shares Weighted- Average Grant Date Fair Value Per Share Number of Shares Weighted- Average Grant Date Fair Value Per Share Number of Shares Weighted- Average Grant Date Fair Value Per Share Number of Shares Weighted- Average Grant Date Fair Value Per Share Outstanding at January 1, 2018 258 $ 66.30 2,266 $ 48.59 1,620 $ 23.57 4,144 $ 39.91 Granted 93 $ 116.01 595 (1) $ 82.64 - $ - 688 $ 87.16 Vested (121 ) $ 59.01 (636 ) $ 40.78 - $ - (757 ) $ 43.69 Forfeited (14 ) $ 82.08 (6 ) $ 63.16 - $ - (20 ) $ 76.57 Outstanding at September 30, 2018 216 $ 90.79 2,219 $ 59.92 1,620 $ 23.57 4,055 $ 47.04 _____________ ( 1 Amount reflects the number of PSUs and MPSUs that may The intrinsic value related to vested RSUs was $13.9 $12.5 three September 30, 2018 2017, $79.0 $61.3 nine September 30, 2018 2017, September 30, 2018, $465.9 $125.53. September 30, 2018, $89.3 three Cash proceeds from vested PSUs with a purchase price feature totaled $9.6 nine September 30, 2018. no nine September 30, 2017. Time-Based RSUs: For the nine September 30, 2018, 93,000 four one 2018 In February 2018, 188,000 two 2018 2019 two “2018 300% 2018 50% 2018 first 2020 2018 two 2018 $46.1 In February 2018, 44,000 2019 two 2018 2019 two “2018 200% 300% 2018 50% 2018 first 2020 2018 two 2018 $8.8 The 2018 2018 $30 not not 2018 2018 $110.00, 2.6 27.5% 2.3%. 2015 On December 31, 2015, 86,000 41,000 “2015 500% 2015 2015 four December 31, 2019. first five $71.36 $95.57 January 1, 2016 December 31, 2019. September 30, 2017, five first The second, third fourth five 1 20 2 second $89.56 $106.81 January 1, 2017 December 31, 2019. December 31, 2017, five second third $120.80 $135.48 January 1, 2018 December 31, 2019. September 30, 2018, five third fourth December 31, 2018 January 1, 2019 December 31, 2019. In addition, each of the second, third fourth one six 1. Successful implementation of full digital solutions for certain power products. 2. Successful implementation, and adoption by a key customer, of an integrated, software-based field-oriented control with sensors to motor drivers. 3. Successful implementation of certain advanced power analog processes. 4. Successful design wins and achievement of a specific level of revenue with a global networking customer. 5. Achievement of a specific level of revenue with a global electronics manufacturer. 6. Achievement of a specific level of market share with certain core power products. As of October 30, 2018, first second Subject to the employees’ continued employment with the Company, the 2015 January 1, 2020 2015 two The Company determined the grant date fair value of the 2015 $61.35, 33.2%, 1.3%, 7.8% 2015 $24.6 $8.3 first $4.5 second $5.2 third $6.6 fourth For the first third fourth October 30, 2018, two one third fourth Employee Stock Purchase Plan (“ESPP”) For the three September 30, 2018 2017, 15,000 18,000 nine September 30, 2018 2017, 33,000 40,000 September 30, 2018, 4.6 The intrinsic value of the shares issued was $0.6 $0.5 three September 30, 2018 2017, $1.1 $1.0 nine September 30, 2018 2017, September 30, 2018, $0.4 first 2019. Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Expected term (years) 0.5 0.5 0.5 0.5 Expected volatility 30.8 % 23.5 % 29.5 % 23.5 % Risk-free interest rate 2.2 % 1.2 % 2.0 % 0.9 % Dividend yield 0.9 % 0.8 % 1.0 % 0.9 % Cash proceeds from the shares issued under the ESPP were $3.0 $2.7 nine September 30, 2018 2017,

Note 4 - Balance Sheet Componen

Note 4 - Balance Sheet Components	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Supplemental Balance Sheet Disclosures [Text Block]	4. Inventories Inventories consist of the following (in thousands): September 30, December 31, 2018 2017 Raw materials $ 41,679 $ 20,573 Work in process 43,112 40,030 Finished goods 51,999 38,678 Total $ 136,790 $ 99,281 Other Current Assets Other current assets consist of the following (in thousands): September 30, December 31, 2018 2017 Prepaid wafer purchase $ 4,297 $ 6,217 Other prepaid expense 3,813 2,742 Interest receivable 1,413 1,352 Assets for product returns 2,320 - Value-added tax receivable 396 1,235 Other 637 1,216 Total $ 12,876 $ 12,762 Under Topic 606, 606, Other Long-Term Assets Other long-term assets consist of the following (in thousands): September 30, December 31, 2018 2017 Deferred compensation plan assets $ 30,425 $ 28,080 Prepaid expense 1,588 897 Other 1,258 1,091 Total $ 33,271 $ 30,068 Accrued Liabilities Accrued liabilities consist of the following (in thousands): September 30, December 31, 2018 2017 Dividends and dividend equivalents $ 14,737 $ 9,248 Stock rotation and sales returns 7,464 2,647 Warranty 4,934 2,416 Income tax payable 1,911 2,861 Customer prepayments 1,818 4,742 Commissions 1,334 938 Sales rebate 380 1,036 Deferred income - 1,845 Other 2,330 1,774 Total $ 34,908 $ 27,507 A roll-forward of the warranty reserve is as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Balance at beginning of period $ 3,951 $ 2,627 $ 2,416 $ 1,030 Warranty provision for product sales 3,840 129 5,654 2,431 Settlements made (36 ) (161 ) (100 ) (710 ) Unused warranty provision (2,821 ) (88 ) (3,036 ) (244 ) Balance at end of period $ 4,934 $ 2,507 $ 4,934 $ 2,507 Other Long-Term Liabilities Other long-term liabilities consist of the following (in thousands): September 30, December 31, 2018 2017 Deferred compensation plan liabilities $ 30,412 $ 28,087 Dividend equivalents 5,818 4,881 Other 83 56 Total $ 36,313 $ 33,024

Note 5 - Goodwill and Acquisiti

Note 5 - Goodwill and Acquisition-related Intangible Assets, Net	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	5. There have been no three nine September 30, 2018. Acquisition-related intangible assets consist of the following (in thousands): September 30, 2018 Gross Amount Accumulated Amortization Net Amount Know-how $ 1,018 $ (857 ) $ 161 Developed technologies 6,466 (6,319 ) 147 Total $ 7,484 $ (7,176 ) $ 308 December 31, 2017 Gross Amount Accumulated Amortization Net Amount Know-how $ 1,018 $ (704 ) $ 314 Developed technologies 6,466 (5,829 ) 637 Total $ 7,484 $ (6,533 ) $ 951 Amortization expense is recorded in cost of revenue in the Condensed Consolidated Statements of Operations. For the three September 30, 2018 2017, $0.2 $0.5 nine September 30, 2018 2017, $0.6 $1.5 As of September 30, 2018, 2018 (remaining three months) $ 198 2019 110 Total $ 308

Note 6 - Net Income Per Share

Note 6 - Net Income Per Share	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Earnings Per Share [Text Block]	6. Basic net income per share is computed by dividing net income by the weighted-average number of common shares outstanding for the period. Diluted net income per share reflects the potential dilution that would occur if outstanding securities or other contracts to issue common stock were exercised or converted into common shares, and calculated using the treasury stock method. Contingently issuable shares, including equity awards with performance conditions or market conditions, are considered outstanding common shares and included in the basic net income per share as of the date that all necessary conditions to earn the awards have been satisfied. Prior to the end of the contingency period, the number of contingently issuable shares included in the diluted net income per share is based on the number of shares, if any, that would be issuable under the terms of the arrangement at the end of the reporting period. The Company’s outstanding RSUs contain forfeitable rights to receive cash dividend equivalents, which are accumulated and paid to the employees when the underlying RSUs vest. Dividend equivalents accumulated on the underlying RSUs are forfeited if the employees do not not not The following table sets forth the computation of basic and diluted net income per share (in thousands, except per-share amounts): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Numerator: Net income $ 31,568 $ 23,642 $ 77,630 $ 53,132 Denominator: Weighted-average outstanding shares used to compute basic net income per share 42,362 41,458 42,173 41,276 Effect of dilutive securities 2,307 2,028 2,277 2,108 Weighted-average outstanding shares used to compute diluted net income per share 44,669 43,486 44,450 43,384 Net income per share: Basic $ 0.75 $ 0.57 $ 1.84 $ 1.29 Diluted $ 0.71 $ 0.54 $ 1.75 $ 1.22

Note 7 - Segment and Geographic

Note 7 - Segment and Geographic Information	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	7. The Company operates in one The Company sells its products primarily through third 10% 10% Revenue Accounts Receivable Three Months Ended September 30, Nine Months Ended September 30, September 30, December 31, Customer 2018 2017 2018 2017 2018 2017 A (distributor) 23 % 17 % 21 % 17 % 21 % 16 % B (distributor) 10 % 15 % 10 % * 16 % * C (value-added reseller) * * * * * 15 % __________________ * Represents less than 10%. The Company’s agreements with these third may may not The following is a summary of revenue by geographic regions (in thousands): Three Months Ended September 30, Nine Months Ended September 30, Country or Region 2018 2017 2018 2017 China $ 91,509 $ 66,645 $ 245,580 $ 185,054 Taiwan 20,774 27,387 55,315 59,548 Europe 12,579 10,726 36,696 28,227 Korea 11,406 9,279 30,046 25,594 Southeast Asia 11,259 7,179 28,261 20,476 Japan 6,895 4,813 18,994 14,584 United States 5,375 2,781 13,404 7,711 Other 178 129 589 305 Total $ 159,975 $ 128,939 $ 428,885 $ 341,499 The following is a summary of revenue by product family (in thousands): Three Months Ended September 30, Nine Months Ended September 30, Product Family 2018 2017 2018 2017 DC to DC $ 147,727 $ 119,089 $ 394,492 $ 312,700 Lighting Control 12,248 9,850 34,393 28,799 Total $ 159,975 $ 128,939 $ 428,885 $ 341,499 The following is a summary of long-lived assets by geographic regions (in thousands): September 30, December 31, Country 2018 2017 China $ 92,066 $ 89,472 United States 68,014 65,618 Taiwan 17,033 17,238 Bermuda 6,879 7,522 Other 810 388 Total $ 184,802 $ 180,238

Note 8 - Litigation

Note 8 - Litigation	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Legal Matters and Contingencies [Text Block]	8. The Company is a party to actions and proceedings in the ordinary course of business, including potential litigation initiated by its shareholders, challenges to the enforceability or validity of its intellectual property, claims that the Company’s products infringe on the intellectual property rights of others, and employment matters. These proceedings often involve complex questions of fact and law and may September 30, 2018, no

Note 9 - Cash, Cash Equivalents

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Cash, Cash Equivalents, Investments, and Restricted Cash Disclosure [Text Block]	9. The following is a summary of the Company’s cash, cash equivalents and short-term and long-term investments (in thousands): September 30, December 31, 2018 2017 Cash, cash equivalents and investments: Cash $ 105,859 $ 75,125 Money market funds 25,235 7,134 Corporate debt securities 190,924 203,807 U.S. treasuries and government agency bonds 24,230 13,024 Certificates of deposit 1,600 - Auction-rate securities backed by student-loan notes 5,257 5,256 Total $ 353,105 $ 304,346 September 30, December 31, 2018 2017 Reported as: Cash and cash equivalents $ 131,094 $ 82,759 Short-term investments 216,754 216,331 Long-term investments 5,257 5,256 Total $ 353,105 $ 304,346 The contractual maturities of the Company’s short-term and long-term available-for-sale investments are as follows (in thousands): September 30, December 31, 2018 2017 Due in less than 1 year $ 111,908 $ 89,399 Due in 1 - 5 years 104,846 126,932 Due in greater than 5 years 5,257 5,256 Total $ 222,011 $ 221,587 The following tables summarize the unrealized gain and loss positions related to the Company’s available-for sale investments (in thousands): September 30, 2018 Amortized Cost Unrealized Gains Unrealized Losses Total Fair Value Fair Value of Investments in Unrealized Loss Position Money market funds $ 25,235 $ - $ - $ 25,235 $ - Corporate debt securities 192,581 2 (1,659 ) 190,924 187,359 U.S. treasuries and government agency bonds 24,419 - (189 ) 24,230 24,230 Certificates of deposit 1,600 - - 1,600 - Auction-rate securities backed by student-loan notes 5,570 - (313 ) 5,257 5,257 Total $ 249,405 $ 2 $ (2,161 ) $ 247,246 $ 216,846 December 31, 2017 Amortized Cost Unrealized Gains Unrealized Losses Total Fair Value Fair Value of Investments in Unrealized Loss Position Money market funds $ 7,134 $ - $ - $ 7,134 $ - Corporate debt securities 204,789 17 (999 ) 203,807 197,564 U.S. treasuries and government agency bonds 13,092 - (68 ) 13,024 13,024 Auction-rate securities backed by student-loan notes 5,570 - (314 ) 5,256 5,256 Total $ 230,585 $ 17 $ (1,381 ) $ 229,221 $ 215,844 Restricted Cash The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Condensed Consolidated Balance Sheets to the amounts shown in the Condensed Consolidated Statements of Cash Flows: September 30, December 31, 2018 2017 Cash and cash equivalents $ 131,094 $ 82,759 Restricted cash included in other long-term assets 115 115 Total cash, cash equivalents and restricted cash shown in the Condensed Consolidated Statements of Cash Flows $ 131,209 $ 82,874 Restricted cash includes a security deposit that is set aside in a bank account and cannot be withdrawn by the Company under the terms of a lease agreement. The restriction will end and any unused amount will be returned to the Company upon the expiration of the lease.

Note 10 - Fair Value Measuremen

Note 10 - Fair Value Measurements	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Fair Value Disclosures [Text Block]	10. The following tables summarize the fair value measurement of the financial assets (in thousands): Fair Value Measurement at September 30, 2018 Total Level 1 Level 2 Level 3 Money market funds $ 25,235 $ 25,235 $ - $ - Corporate debt securities 190,924 - 190,924 - U.S. treasuries and government agency bonds 24,230 - 24,230 - Certificates of deposit 1,600 - 1,600 - Auction-rate securities backed by student-loan notes 5,257 - - 5,257 Mutual funds and money market funds under deferred compensation plan 16,284 16,284 - - Total $ 263,530 $ 41,519 $ 216,754 $ 5,257 Fair Value Measurement at December 31, 2017 Total Level 1 Level 2 Level 3 Money market funds $ 7,134 $ 7,134 $ - $ - Corporate debt securities 203,807 - 203,807 - U.S. treasuries and government agency bonds 13,024 - 13,024 - Auction-rate securities backed by student-loan notes 5,256 - - 5,256 Mutual funds and money market funds under deferred compensation plan 16,625 16,625 - - Total $ 245,846 $ 23,759 $ 216,831 $ 5,256 ● Level 1—includes ● Level 2—includes may third ● Level 3—includes The Company’s level 3 2008. September 30, December 31, 2018 2017 Time-to-liquidity (years) 2 - 3 2 - 3 Discount rate 5.4% - 10.5% 4.5% - 9.6%

Note 11 - Deferred Compensation

Note 11 - Deferred Compensation Plan	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Compensation and Employee Benefit Plans [Text Block]	11. The following table summarizes the deferred compensation plan balances in the Condensed Consolidated Balance Sheets (in thousands): September 30, December 31, 2018 2017 Deferred compensation plan asset components: Cash surrender value of corporate-owned life insurance policies $ 14,141 $ 11,455 Fair value of mutual funds and money market funds 16,284 16,625 Total $ 30,425 $ 28,080 Deferred compensation plan assets reported in: Other long-term assets $ 30,425 $ 28,080 Deferred compensation plan liabilities reported in: Accrued compensation and related benefits (short-term) $ 447 $ 356 Other long-term liabilities 30,412 28,087 Total $ 30,859 $ 28,443

Note 12 - Interest and Other In

Note 12 - Interest and Other Income, Net	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Other Nonoperating Income and Expense [Text Block]	12. The components of interest and other income, net are as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Interest income $ 1,583 $ 1,346 $ 4,606 $ 3,938 Amortization of premium on available-for-sale securities (314 ) (490 ) (1,122 ) (1,494 ) Gain on deferred compensation plan investments 717 636 949 1,902 Foreign currency exchange gain (loss) 700 (237 ) 915 (473 ) Other 28 - 39 - Total $ 2,714 $ 1,255 $ 5,387 $ 3,873

Note 13 - Income Taxes

Note 13 - Income Taxes	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Income Tax Disclosure [Text Block]	13. As of September 30, 2018, not December 2017 ( “2017 fourth 2017. No. 118, December 2018 The income tax provision for the three nine September 30, 2018 $4.6 12.8% $8.2 9.5% 2017 For the three nine September 30, 2018, $18.4 $46.2 first 2018, 2018 $1.9 September 30, 2018, $1.9 $20.1 The income tax provision for the three nine September 30, 2017 $1.4 5.8% $3.1 5.5% As of September 30, 2018, $18.1 $11.2 December 31, 2017, $16.3 $9.1 Uncertain tax positions relate to the allocation of income and deductions between the Company’s global entities and to the determination of the research and development tax credit. It is reasonably possible that over the next twelve may not The Company recognizes interest and penalties, if any, related to uncertain tax positions in its income tax provision. As of September 30, 2018 December 31, 2017, $0.8 $0.5 In July 2018, 2015 Altera v. Commissioner not , August 2018, July 2018

Note 14 - Accumulated Other Com

Note 14 - Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	14. The following table summarizes the changes in accumulated other comprehensive income (loss) (in thousands): Unrealized Losses on Available-for- Sale Securities Foreign Currency Translation Adjustments Total Balance as of January 1, 2018 $ (1,364 ) $ 3,177 $ 1,813 Other comprehensive income (loss) before reclassifications (1,185 ) 4,389 3,204 Amounts reclassified from accumulated other comprehensive income (loss) 25 - 25 Net current period other comprehensive income (loss) (1,160 ) 4,389 3,229 Balance as of March 31, 2018 (2,524 ) 7,566 5,042 Other comprehensive income (loss) before reclassifications 94 (6,862 ) (6,768 ) Amounts reclassified from accumulated other comprehensive income (loss) 21 - 21 Net current period other comprehensive income (loss) 115 (6,862 ) (6,747 ) Balance as of June 30, 2018 (2,409 ) 704 (1,705 ) Other comprehensive income (loss) before reclassifications 242 (4,526 ) (4,284 ) Amounts reclassified from accumulated other comprehensive income (loss) 8 - 8 Tax effect 241 - 241 Net current period other comprehensive income (loss) 491 (4,526 ) (4,035 ) Balance as of September 30, 2018 $ (1,918 ) $ (3,822 ) $ (5,740 ) The amounts reclassified from accumulated other comprehensive income (loss) were recorded in interest and other income, net, in the Condensed Consolidated Statements of Operations.

Note 15 - Dividends and Dividen

Note 15 - Dividends and Dividend Equivalents	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Dividends And Dividend Equivalents [Text Block]	15. Cash Dividend Program In June 2014, Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Dividend declared per share $ 0.30 $ 0.20 $ 0.90 $ 0.60 Total amount $ 12,722 $ 8,301 $ 38,052 $ 24,822 As of September 30, 2018 December 31, 2017, $12.7 $8.3 The declaration of any future cash dividends is at the discretion of the Board of Directors and will depend on, among other things, the Company’s financial condition, results of operations, capital requirements, business conditions, statutory requirements of Delaware law, and other factors that the Board of Directors may The Company anticipates that cash used for future dividend payments will come from its current domestic cash and cash generated from ongoing U.S. operations, as well as cash to be repatriated from its Bermuda subsidiary. Earnings from other foreign subsidiaries will continue to be indefinitely reinvested. Cash Dividend Equivalent Rights Under the Company’s stock plans, outstanding RSUs contain rights to receive cash dividend equivalents, which entitle employees who hold RSUs to the same dividend value per share as holders of common stock. The dividend equivalents are accumulated and paid to the employees when the underlying RSUs vest. Dividend equivalents accumulated on the underlying RSUs are forfeited if the employees do not not September 30, 2018 December 31, 2017, $7.8 $5.8

Note 16 - Subsequent Event

Note 16 - Subsequent Event	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Subsequent Events [Text Block]	16. Employee Equity Awards 2018 In October 2018, 60,000 60,000 “2018 500% 2018 five $140 $172. first two October 26, 2018 December 31, 2021, three October 26, 2018 December 31, 2023. Subject to the employees’ continued employment with the Company, the 2018 January 1, 2024 2018 two 2019 In October 2018, 53,000 2020 two 2019 2020 two “2019 200% 300% 2019 50% 2019 first 2021 2019 two

Significant Accounting Policies

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	The accompanying unaudited condensed consolidated financial statements have been prepared by Monolithic Power Systems, Inc. (the “Company” or “MPS”) in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) have been condensed or omitted in accordance with these accounting principles, rules and regulations. The information in this report should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Annual Report on Form 10 December 31, 2017, March 1, 2018. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments) necessary to present fairly the Company’s financial position, results of operations and cash flows for the interim periods presented. The financial statements contained in this Form 10 not may December 31, 2018
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Pronouncements In May 2014, No. 2014 09, Revenue from Contracts with Customers (Topic 606 January 1, 2018 not December 31, 2017. January 1, 2018 606, not 605, Revenue Recognition The Company recorded a net increase to the opening balance of retained earnings of $0.4 January 1, 2018 606, three 606, 606, January 1, 2018, 2 In November 2016, No. 2016 18, Statement of Cash Flows - Restricted Cash (Topic 230 January 1, 2018 9 Recent Accounting Pronounce ments Not September 30, 2018 In August 2018, No. 33 10532, Disclosure Update and Simplification, November 5, 2018. In August 2018, No. 2018 13, Fair Value Measurement (Topic 82 0 ) : Disclosure Framework — Changes to the Disclosure Requirements for Fair Value Measurement , 3 December 15, 2019. In January 2017, No. 2017 04, Intangibles – Goodwill and Other (Topic 350 two not December 15, 2019. In June 2016, No. 2016 13, Financial Instruments – Credit Losses (Topic 326 December 15, 2019, December 15, 2018. In February 2016, No. 2016 02, Leases (Topic 842 12 December 15, 2018, January 1, 2019. no

Note 2 - Revenue Recognition (T

Note 2 - Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Disaggregation of Revenue [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, End Market 2018 % of Revenue 2017 % of Revenue 2018 % of Revenue 2017 % of Revenue Computing and storage $ 47,658 29.8 % $ 29,020 22.5 % $ 115,584 27.0 % $ 74,103 21.7 % Automotive 19,785 12.4 12,857 10.0 57,857 13.5 38,042 11.1 Industrial 24,869 15.5 16,348 12.7 61,544 14.3 46,736 13.7 Communications 19,158 12.0 15,372 11.9 50,442 11.8 47,748 14.0 Consumer 48,505 30.3 55,342 42.9 143,458 33.4 134,870 39.5 Total $ 159,975 100.0 % $ 128,939 100.0 % $ 428,885 100.0 % $ 341,499 100.0 %
Accounting Standards Update 2014-09 [Member]
Notes Tables
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	September 30, 2018 Topic 606 Line Item (As Reported) Topic 605 Difference Assets: Accounts receivable $ 59,887 $ 61,430 $ (1,543 ) Inventories $ 136,790 $ 137,129 $ (339 ) Other current assets $ 12,876 $ 10,556 $ 2,320 Total current assets $ 557,401 $ 556,963 $ 438 Deferred tax assets, net $ 12,852 $ 12,953 $ (101 ) Total assets $ 763,157 $ 762,820 $ 337 Liabilities and Stockholders' Equity: Accrued liabilities $ 34,908 $ 35,190 $ (282 ) Total current liabilities $ 85,507 $ 85,789 $ (282 ) Total liabilities $ 152,993 $ 153,275 $ (282 ) Retained earnings $ 180,819 $ 180,200 $ 619 Total stockholders' equity $ 610,164 $ 609,545 $ 619 Total liabilities and stockholders' equity $ 763,157 $ 762,820 $ 337 Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Topic 606 Topic 606 Line Item (As Reported) Topic 605 Difference (As Reported) Topic 605 Difference Revenue $ 159,975 $ 159,723 $ 252 $ 428,885 $ 428,440 $ 445 Cost of revenue $ 70,957 $ 70,848 $ 109 $ 190,810 $ 190,668 $ 142 Gross profit $ 89,018 $ 88,875 $ 143 $ 238,075 $ 237,772 $ 303 Income from operations $ 33,493 $ 33,350 $ 143 $ 80,411 $ 80,108 $ 303 Income before income taxes $ 36,207 $ 36,064 $ 143 $ 85,798 $ 85,495 $ 303 Income tax provision $ 4,639 $ 4,609 $ 30 $ 8,168 $ 8,104 $ 64 Net income $ 31,568 $ 31,455 $ 113 $ 77,630 $ 77,391 $ 239 Net income per share - basic $ 0.75 $ 0.74 $ 0.01 $ 1.84 $ 1.84 $ - Net income per share - diluted $ 0.71 $ 0.70 $ 0.01 $ 1.75 $ 1.74 $ 0.01 Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Topic 606 Topic 606 Line Item (As Reported) Topic 605 Difference (As Reported) Topic 605 Difference Net income $ 31,568 $ 31,455 $ 113 $ 77,630 $ 77,391 $ 239 Comprehensive income $ 27,533 $ 27,420 $ 113 $ 70,077 $ 69,838 $ 239 Nine Months Ended September 30, 2018 Topic 606 Line Item (As Reported) Topic 605 Difference Cash flows from operating activities: Net income $ 77,630 $ 77,391 $ 239 Changes in operating assets and liabilities: Accounts receivable $ (22,752 ) $ (23,394 ) $ 642 Inventories $ (37,496 ) $ (37,835 ) $ 339 Other assets $ (665 ) $ 1,563 $ (2,228 ) Accrued liabilities $ 4,635 $ 3,691 $ 944 Income tax liabilities $ 528 $ 464 $ 64

Note 3 - Stock-based Compensa_2

Note 3 - Stock-based Compensation (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Cost of revenue $ 471 $ 453 $ 1,384 $ 1,264 Research and development 3,979 3,838 12,168 11,297 Selling, general and administrative 10,393 9,678 32,213 28,198 Total stock-based compensation expense $ 14,843 $ 13,969 $ 45,765 $ 40,759 Tax benefit related to stock-based compensation $ 764 $ - $ 2,723 $ -
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]	Time-Based RSUs PSUs and MPSUs MSUs Total Number of Shares Weighted- Average Grant Date Fair Value Per Share Number of Shares Weighted- Average Grant Date Fair Value Per Share Number of Shares Weighted- Average Grant Date Fair Value Per Share Number of Shares Weighted- Average Grant Date Fair Value Per Share Outstanding at January 1, 2018 258 $ 66.30 2,266 $ 48.59 1,620 $ 23.57 4,144 $ 39.91 Granted 93 $ 116.01 595 (1) $ 82.64 - $ - 688 $ 87.16 Vested (121 ) $ 59.01 (636 ) $ 40.78 - $ - (757 ) $ 43.69 Forfeited (14 ) $ 82.08 (6 ) $ 63.16 - $ - (20 ) $ 76.57 Outstanding at September 30, 2018 216 $ 90.79 2,219 $ 59.92 1,620 $ 23.57 4,055 $ 47.04
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Expected term (years) 0.5 0.5 0.5 0.5 Expected volatility 30.8 % 23.5 % 29.5 % 23.5 % Risk-free interest rate 2.2 % 1.2 % 2.0 % 0.9 % Dividend yield 0.9 % 0.8 % 1.0 % 0.9 %

Note 4 - Balance Sheet Compon_2

Note 4 - Balance Sheet Components (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Schedule of Inventory, Current [Table Text Block]	September 30, December 31, 2018 2017 Raw materials $ 41,679 $ 20,573 Work in process 43,112 40,030 Finished goods 51,999 38,678 Total $ 136,790 $ 99,281
Schedule of Other Current Assets [Table Text Block]	September 30, December 31, 2018 2017 Prepaid wafer purchase $ 4,297 $ 6,217 Other prepaid expense 3,813 2,742 Interest receivable 1,413 1,352 Assets for product returns 2,320 - Value-added tax receivable 396 1,235 Other 637 1,216 Total $ 12,876 $ 12,762
Schedule of Other Assets, Noncurrent [Table Text Block]	September 30, December 31, 2018 2017 Deferred compensation plan assets $ 30,425 $ 28,080 Prepaid expense 1,588 897 Other 1,258 1,091 Total $ 33,271 $ 30,068
Schedule of Accrued Liabilities [Table Text Block]	September 30, December 31, 2018 2017 Dividends and dividend equivalents $ 14,737 $ 9,248 Stock rotation and sales returns 7,464 2,647 Warranty 4,934 2,416 Income tax payable 1,911 2,861 Customer prepayments 1,818 4,742 Commissions 1,334 938 Sales rebate 380 1,036 Deferred income - 1,845 Other 2,330 1,774 Total $ 34,908 $ 27,507
Schedule of Product Warranty Liability [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Balance at beginning of period $ 3,951 $ 2,627 $ 2,416 $ 1,030 Warranty provision for product sales 3,840 129 5,654 2,431 Settlements made (36 ) (161 ) (100 ) (710 ) Unused warranty provision (2,821 ) (88 ) (3,036 ) (244 ) Balance at end of period $ 4,934 $ 2,507 $ 4,934 $ 2,507
Other Noncurrent Liabilities [Table Text Block]	September 30, December 31, 2018 2017 Deferred compensation plan liabilities $ 30,412 $ 28,087 Dividend equivalents 5,818 4,881 Other 83 56 Total $ 36,313 $ 33,024

Note 5 - Goodwill and Acquisi_2

Note 5 - Goodwill and Acquisition-related Intangible Assets, Net (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	September 30, 2018 Gross Amount Accumulated Amortization Net Amount Know-how $ 1,018 $ (857 ) $ 161 Developed technologies 6,466 (6,319 ) 147 Total $ 7,484 $ (7,176 ) $ 308 December 31, 2017 Gross Amount Accumulated Amortization Net Amount Know-how $ 1,018 $ (704 ) $ 314 Developed technologies 6,466 (5,829 ) 637 Total $ 7,484 $ (6,533 ) $ 951
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	2018 (remaining three months) $ 198 2019 110 Total $ 308

Note 6 - Net Income Per Share (

Note 6 - Net Income Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Numerator: Net income $ 31,568 $ 23,642 $ 77,630 $ 53,132 Denominator: Weighted-average outstanding shares used to compute basic net income per share 42,362 41,458 42,173 41,276 Effect of dilutive securities 2,307 2,028 2,277 2,108 Weighted-average outstanding shares used to compute diluted net income per share 44,669 43,486 44,450 43,384 Net income per share: Basic $ 0.75 $ 0.57 $ 1.84 $ 1.29 Diluted $ 0.71 $ 0.54 $ 1.75 $ 1.22

Note 7 - Segment and Geograph_2

Note 7 - Segment and Geographic Information (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Schedule of Revenue and Accounts Receivable by Major Customers by Reporting Segments [Table Text Block]	<table border="0" cellpadding="0" cellspacing="0" style="; font-size: 10pt; font-family: "Times New Roman", Times, serif; text-indent: 0px; min-; min-width: 700px;"> <tr style="vertical-align: bottom;"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td colspan="14" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-weight: bold;">Revenue</div></div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; padding-bottom: 1px;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td colspan="6" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-weight: bold;">Accounts Receivable</div></div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; padding-bottom: 1px;"> </td> </tr> <tr style="vertical-align: bottom;"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td colspan="6" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: thin solid rgb(0, 0, 0);"> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-weight: bold;">Three Months Ended September 30,</div></div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td colspan="6" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: thin solid rgb(0, 0, 0);"> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-weight: bold;">Nine Months Ended September 30,</div></div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td colspan="2" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-weight: bold;">September 30,</div></div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td colspan="2" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-weight: bold;">December 31,</div></div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> </tr> <tr style="vertical-align: bottom;"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; width: 28%; border-bottom: thin solid rgb(0, 0, 0);"> <div style=" font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt; text-align: center;"><div style="display: inline; font-weight: bold;">Customer</div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td colspan="2" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-weight: bold;">2018</div></div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; padding-bottom: 1px;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td colspan="2" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-weight: bold;">2017</div></div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; padding-bottom: 1px;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td colspan="2" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-weight: bold;">2018</div></div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; padding-bottom: 1px;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td colspan="2" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-weight: bold;">2017</div></div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; padding-bottom: 1px;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td colspan="2" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-weight: bold;">2018</div></div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; padding-bottom: 1px;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td colspan="2" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> <div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-weight: bold;">2017</div></div></div> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; padding-bottom: 1px;"> </td> </tr> <tr style="vertical-align: bottom; background-color: rgb(204, 238, 255);"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> <div style=" font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">A (distributor)</div> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">23</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">17</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">21</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">17</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">21</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">16</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> </tr> <tr style="vertical-align: bottom; background-color: rgb(255, 255, 255);"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> <div style=" font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">B (distributor)</div> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">10</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">15</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">10</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">16</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> </td> </tr> <tr style="vertical-align: bottom; background-color: rgb(204, 238, 255);"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> <div style=" font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">C (value-added reseller)</div> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 9%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"><div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">15</div></td> <td nowrap="nowrap" style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> </tr> </table></div>" id="sjs-B4">&lt;div style="display: inline; font-family: times new roman; font-size: 10pt">&lt;table border="0" cellpadding="0" cellspacing="0" style="; font-size: 10pt; font-family: &quot;Times New Roman&quot;, Times, serif; text-indent: 0px; min-; min-width: 700px;"> &lt;tr style="vertical-align: bottom;"> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td colspan="14" style="text-align: center; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> &lt;div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;">&lt;div style="display: inline; font-weight: bold;">&lt;div style="display: inline; font-weight: bold;">Revenue&lt;/div>&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; padding-bottom: 1px;">&nbsp;&lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td colspan="6" style="text-align: center; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> &lt;div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;">&lt;div style="display: inline; font-weight: bold;">&lt;div style="display: inline; font-weight: bold;">Accounts Receivable&lt;/div>&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; padding-bottom: 1px;">&nbsp;&lt;/td> &lt;/tr> &lt;tr style="vertical-align: bottom;"> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td colspan="6" style="text-align: center; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: thin solid rgb(0, 0, 0);"> &lt;div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;">&lt;div style="display: inline; font-weight: bold;">&lt;div style="display: inline; font-weight: bold;">Three Months Ended September 30,&lt;/div>&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td colspan="6" style="text-align: center; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: thin solid rgb(0, 0, 0);"> &lt;div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;">&lt;div style="display: inline; font-weight: bold;">&lt;div style="display: inline; font-weight: bold;">Nine Months Ended September 30,&lt;/div>&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td colspan="2" style="text-align: center; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;"> &lt;div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;">&lt;div style="display: inline; font-weight: bold;">&lt;div style="display: inline; font-weight: bold;">September 30,&lt;/div>&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td colspan="2" style="text-align: center; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;"> &lt;div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;">&lt;div style="display: inline; font-weight: bold;">&lt;div style="display: inline; font-weight: bold;">December 31,&lt;/div>&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;/tr> &lt;tr style="vertical-align: bottom;"> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; width: 28%; border-bottom: thin solid rgb(0, 0, 0);"> &lt;div style=" font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt; text-align: center;">&lt;div style="display: inline; font-weight: bold;">Customer&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td colspan="2" style="text-align: center; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> &lt;div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;">&lt;div style="display: inline; font-weight: bold;">&lt;div style="display: inline; font-weight: bold;">2018&lt;/div>&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; padding-bottom: 1px;">&nbsp;&lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td colspan="2" style="text-align: center; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> &lt;div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;">&lt;div style="display: inline; font-weight: bold;">&lt;div style="display: inline; font-weight: bold;">2017&lt;/div>&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; padding-bottom: 1px;">&nbsp;&lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td colspan="2" style="text-align: center; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> &lt;div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;">&lt;div style="display: inline; font-weight: bold;">&lt;div style="display: inline; font-weight: bold;">2018&lt;/div>&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; padding-bottom: 1px;">&nbsp;&lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td colspan="2" style="text-align: center; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> &lt;div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;">&lt;div style="display: inline; font-weight: bold;">&lt;div style="display: inline; font-weight: bold;">2017&lt;/div>&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; padding-bottom: 1px;">&nbsp;&lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td colspan="2" style="text-align: center; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> &lt;div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;">&lt;div style="display: inline; font-weight: bold;">&lt;div style="display: inline; font-weight: bold;">2018&lt;/div>&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; padding-bottom: 1px;">&nbsp;&lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td colspan="2" style="text-align: center; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> &lt;div style=" font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;">&lt;div style="display: inline; font-weight: bold;">&lt;div style="display: inline; font-weight: bold;">2017&lt;/div>&lt;/div>&lt;/div> &lt;/td> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; padding-bottom: 1px;">&nbsp;&lt;/td> &lt;/tr> &lt;tr style="vertical-align: bottom; background-color: rgb(204, 238, 255);"> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;"> &lt;div style=" font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">A (distributor)&lt;/div> &lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">23&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">%&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">17&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">%&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">21&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">%&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">17&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">%&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">21&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">%&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">16&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">%&lt;/td> &lt;/tr> &lt;tr style="vertical-align: bottom; background-color: rgb(255, 255, 255);"> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;"> &lt;div style=" font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">B (distributor)&lt;/div> &lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">10&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">%&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">15&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">%&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">10&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">%&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">16&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">%&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&nbsp;&lt;/td> &lt;/tr> &lt;tr style="vertical-align: bottom; background-color: rgb(204, 238, 255);"> &lt;td style="font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;"> &lt;div style=" font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">C (value-added reseller)&lt;/div> &lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">*&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt;">&nbsp;&lt;/td> &lt;td style="width: 9%; text-align: right; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">&lt;div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;">15&lt;/div>&lt;/td> &lt;td nowrap="nowrap" style="width: 1%; font-family: &quot;Times New Roman&quot;, Times, serif; font-size: 10pt; margin-left: 0pt;">%&lt;/td> &lt;/tr> &lt;/table>&lt;/div>
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, Country or Region 2018 2017 2018 2017 China $ 91,509 $ 66,645 $ 245,580 $ 185,054 Taiwan 20,774 27,387 55,315 59,548 Europe 12,579 10,726 36,696 28,227 Korea 11,406 9,279 30,046 25,594 Southeast Asia 11,259 7,179 28,261 20,476 Japan 6,895 4,813 18,994 14,584 United States 5,375 2,781 13,404 7,711 Other 178 129 589 305 Total $ 159,975 $ 128,939 $ 428,885 $ 341,499
Revenue from External Customers by Products and Services [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, Product Family 2018 2017 2018 2017 DC to DC $ 147,727 $ 119,089 $ 394,492 $ 312,700 Lighting Control 12,248 9,850 34,393 28,799 Total $ 159,975 $ 128,939 $ 428,885 $ 341,499
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]	September 30, December 31, Country 2018 2017 China $ 92,066 $ 89,472 United States 68,014 65,618 Taiwan 17,033 17,238 Bermuda 6,879 7,522 Other 810 388 Total $ 184,802 $ 180,238

Note 9 - Cash, Cash Equivalen_2

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	September 30, December 31, 2018 2017 Cash, cash equivalents and investments: Cash $ 105,859 $ 75,125 Money market funds 25,235 7,134 Corporate debt securities 190,924 203,807 U.S. treasuries and government agency bonds 24,230 13,024 Certificates of deposit 1,600 - Auction-rate securities backed by student-loan notes 5,257 5,256 Total $ 353,105 $ 304,346 September 30, December 31, 2018 2017 Reported as: Cash and cash equivalents $ 131,094 $ 82,759 Short-term investments 216,754 216,331 Long-term investments 5,257 5,256 Total $ 353,105 $ 304,346
Investments Classified by Contractual Maturity Date [Table Text Block]	September 30, December 31, 2018 2017 Due in less than 1 year $ 111,908 $ 89,399 Due in 1 - 5 years 104,846 126,932 Due in greater than 5 years 5,257 5,256 Total $ 222,011 $ 221,587
Unrealized Gain (Loss) on Investments [Table Text Block]	September 30, 2018 Amortized Cost Unrealized Gains Unrealized Losses Total Fair Value Fair Value of Investments in Unrealized Loss Position Money market funds $ 25,235 $ - $ - $ 25,235 $ - Corporate debt securities 192,581 2 (1,659 ) 190,924 187,359 U.S. treasuries and government agency bonds 24,419 - (189 ) 24,230 24,230 Certificates of deposit 1,600 - - 1,600 - Auction-rate securities backed by student-loan notes 5,570 - (313 ) 5,257 5,257 Total $ 249,405 $ 2 $ (2,161 ) $ 247,246 $ 216,846 December 31, 2017 Amortized Cost Unrealized Gains Unrealized Losses Total Fair Value Fair Value of Investments in Unrealized Loss Position Money market funds $ 7,134 $ - $ - $ 7,134 $ - Corporate debt securities 204,789 17 (999 ) 203,807 197,564 U.S. treasuries and government agency bonds 13,092 - (68 ) 13,024 13,024 Auction-rate securities backed by student-loan notes 5,570 - (314 ) 5,256 5,256 Total $ 230,585 $ 17 $ (1,381 ) $ 229,221 $ 215,844
Restrictions on Cash and Cash Equivalents [Table Text Block]	September 30, December 31, 2018 2017 Cash and cash equivalents $ 131,094 $ 82,759 Restricted cash included in other long-term assets 115 115 Total cash, cash equivalents and restricted cash shown in the Condensed Consolidated Statements of Cash Flows $ 131,209 $ 82,874

Note 10 - Fair Value Measurem_2

Note 10 - Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Fair Value Measurement at September 30, 2018 Total Level 1 Level 2 Level 3 Money market funds $ 25,235 $ 25,235 $ - $ - Corporate debt securities 190,924 - 190,924 - U.S. treasuries and government agency bonds 24,230 - 24,230 - Certificates of deposit 1,600 - 1,600 - Auction-rate securities backed by student-loan notes 5,257 - - 5,257 Mutual funds and money market funds under deferred compensation plan 16,284 16,284 - - Total $ 263,530 $ 41,519 $ 216,754 $ 5,257 Fair Value Measurement at December 31, 2017 Total Level 1 Level 2 Level 3 Money market funds $ 7,134 $ 7,134 $ - $ - Corporate debt securities 203,807 - 203,807 - U.S. treasuries and government agency bonds 13,024 - 13,024 - Auction-rate securities backed by student-loan notes 5,256 - - 5,256 Mutual funds and money market funds under deferred compensation plan 16,625 16,625 - - Total $ 245,846 $ 23,759 $ 216,831 $ 5,256
Schedule Of Level 3 Assumptions [Table Text Block]	September 30, December 31, 2018 2017 Time-to-liquidity (years) 2 - 3 2 - 3 Discount rate 5.4% - 10.5% 4.5% - 9.6%

Note 11 - Deferred Compensati_2

Note 11 - Deferred Compensation Plan (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Schedule of Deferred Compensation Plan [Table Text Block]	September 30, December 31, 2018 2017 Deferred compensation plan asset components: Cash surrender value of corporate-owned life insurance policies $ 14,141 $ 11,455 Fair value of mutual funds and money market funds 16,284 16,625 Total $ 30,425 $ 28,080 Deferred compensation plan assets reported in: Other long-term assets $ 30,425 $ 28,080 Deferred compensation plan liabilities reported in: Accrued compensation and related benefits (short-term) $ 447 $ 356 Other long-term liabilities 30,412 28,087 Total $ 30,859 $ 28,443

Note 12 - Interest and Other _2

Note 12 - Interest and Other Income, Net (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Interest income $ 1,583 $ 1,346 $ 4,606 $ 3,938 Amortization of premium on available-for-sale securities (314 ) (490 ) (1,122 ) (1,494 ) Gain on deferred compensation plan investments 717 636 949 1,902 Foreign currency exchange gain (loss) 700 (237 ) 915 (473 ) Other 28 - 39 - Total $ 2,714 $ 1,255 $ 5,387 $ 3,873

Note 14 - Accumulated Other C_2

Note 14 - Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Unrealized Losses on Available-for- Sale Securities Foreign Currency Translation Adjustments Total Balance as of January 1, 2018 $ (1,364 ) $ 3,177 $ 1,813 Other comprehensive income (loss) before reclassifications (1,185 ) 4,389 3,204 Amounts reclassified from accumulated other comprehensive income (loss) 25 - 25 Net current period other comprehensive income (loss) (1,160 ) 4,389 3,229 Balance as of March 31, 2018 (2,524 ) 7,566 5,042 Other comprehensive income (loss) before reclassifications 94 (6,862 ) (6,768 ) Amounts reclassified from accumulated other comprehensive income (loss) 21 - 21 Net current period other comprehensive income (loss) 115 (6,862 ) (6,747 ) Balance as of June 30, 2018 (2,409 ) 704 (1,705 ) Other comprehensive income (loss) before reclassifications 242 (4,526 ) (4,284 ) Amounts reclassified from accumulated other comprehensive income (loss) 8 - 8 Tax effect 241 - 241 Net current period other comprehensive income (loss) 491 (4,526 ) (4,035 ) Balance as of September 30, 2018 $ (1,918 ) $ (3,822 ) $ (5,740 )

Note 15 - Dividends and Divid_2

Note 15 - Dividends and Dividend Equivalents (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Dividends Declared [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Dividend declared per share $ 0.30 $ 0.20 $ 0.90 $ 0.60 Total amount $ 12,722 $ 8,301 $ 38,052 $ 24,822

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation (Details Textual) $ in Millions	Jan. 01, 2018USD ($)
Accounting Standards Update 2014-09 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 0.4

Note 2 - Revenue Recognition (D

Note 2 - Revenue Recognition (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Lapse Period for Consignment			60 days
Accounts Receivable, Net, Current, Total	$ 59,887		$ 59,887		$ 38,037
Allowance for Doubtful Accounts Receivable, Write-offs			$ 0		0
Revenue, Performance Obligation, Performance Period Following Prepayment			90 days
Minimum [Member]
Contract with Customer, Payment Term			30 days
Maximum [Member]
Contract with Customer, Payment Term			60 days
Certain Customers in China [Member]
Contract with Customer, Payment Term Required Prior to Shipping Products			14 days
Contract with Customer, Liability, Revenue Recognized			$ 4,700
Certain Customers in China [Member] | Accrued Liabilities, Current [Member]
Contract with Customer, Liability, Current	$ 1,800		$ 1,800		$ 4,700
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member] | Distributor Sales [Member]
Concentration Risk, Percentage	87.00%	88.00%	87.00%	88.00%

Note 2 - Revenue Recognition -

Note 2 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Revenue	$ 159,975	$ 128,939	[1]	$ 428,885	$ 341,499	[1]
Percentage of revenue	100.00%	100.00%		100.00%	100.00%
Computing and Storage Market [Member]
Revenue	$ 47,658	$ 29,020	[1]	$ 115,584	$ 74,103	[1]
Percentage of revenue	29.80%	22.50%		27.00%	21.70%
Automotive Market [Member]
Revenue	$ 19,785	$ 12,857	[1]	$ 57,857	$ 38,042	[1]
Percentage of revenue	12.40%	10.00%		13.50%	11.10%
Industrial Market [Member]
Revenue	$ 24,869	$ 16,348	[1]	$ 61,544	$ 46,736	[1]
Percentage of revenue	15.50%	12.70%		14.30%	13.70%
Communications Market [Member]
Revenue	$ 19,158	$ 15,372	[1]	$ 50,442	$ 47,748	[1]
Percentage of revenue	12.00%	11.90%		11.80%	14.00%
Consumer Market [Member]
Revenue	$ 48,505	$ 55,342	[1]	$ 143,458	$ 134,870	[1]
Percentage of revenue	30.30%	42.90%		33.40%	39.50%
[1]	2017 amounts have not been adjusted under the modified retrospective method.

Note 2 - Revenue Recognition _2

Note 2 - Revenue Recognition - Impact of Topic 606 (Details) - USD ($) $ / shares in Units, $ in Thousands	2 Months Ended	3 Months Ended			9 Months Ended
	Sep. 03, 2018	Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017		Dec. 31, 2017
Accounts receivable		$ 59,887			$ 59,887			$ 38,037
Inventories		136,790			136,790			99,281
Other current assets		12,876			12,876			12,762
Total current assets		557,401			557,401			449,170
Deferred tax assets, net		12,852			12,852			15,917
Total assets		763,157			763,157			652,569
Accrued liabilities		34,908			34,908			27,507
Total current liabilities		85,507			85,507			65,917
Total liabilities		152,993			152,993			130,562
Retained earnings		180,819			180,819			143,608
Total stockholders' equity		610,164			610,164			522,007
Total liabilities and stockholders' equity		763,157			763,157			$ 652,569
Revenue		159,975	$ 128,939	[1]	428,885	$ 341,499	[1]
Cost of revenue		70,957	58,083		190,810	154,377
Gross profit		89,018	70,856		238,075	187,122
Income from operations		33,493	23,832		80,411	52,371
Income before income taxes		36,207	25,087		85,798	56,244
Income tax provision		4,639	1,445		8,168	3,112
Net income	$ 31,568	$ 31,568	$ 23,642		$ 77,630	$ 53,132
Basic (in dollars per share)		$ 0.75	$ 0.57		$ 1.84	$ 1.29
Net income per share - diluted (in dollars per share)		$ 0.71	$ 0.54		$ 1.75	$ 1.22
Comprehensive income	27,533	$ 27,533	$ 25,364		$ 70,077	$ 57,689
Accounts receivable					(22,752)	(16,505)
Inventories					(37,496)	(28,384)
Other assets					(665)	1,696
Accrued liabilities					4,635	7,276
Income tax liabilities					528	$ 1,249
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Accounts receivable		61,430			61,430
Inventories		137,129			137,129
Other current assets		10,556			10,556
Total current assets		556,963			556,963
Deferred tax assets, net		12,953			12,953
Total assets		762,820			762,820
Accrued liabilities		35,190			35,190
Total current liabilities		85,789			85,789
Total liabilities		153,275			153,275
Retained earnings		180,200			180,200
Total stockholders' equity		609,545			609,545
Total liabilities and stockholders' equity		762,820			762,820
Revenue		159,723			428,440
Cost of revenue		70,848			190,668
Gross profit		88,875			237,772
Income from operations		33,350			80,108
Income before income taxes		36,064			85,495
Income tax provision		4,609			8,104
Net income	31,455	$ 31,455			$ 77,391
Basic (in dollars per share)		$ 0.74			$ 1.84
Net income per share - diluted (in dollars per share)		$ 0.70			$ 1.74
Comprehensive income	27,420				$ 69,838
Accounts receivable					(23,394)
Inventories					(37,835)
Other assets					1,563
Accrued liabilities					3,691
Income tax liabilities					464
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Accounts receivable		$ (1,543)			(1,543)
Inventories		(339)			(339)
Other current assets		2,320			2,320
Total current assets		438			438
Deferred tax assets, net		(101)			(101)
Total assets		337			337
Accrued liabilities		(282)			(282)
Total current liabilities		(282)			(282)
Total liabilities		(282)			(282)
Retained earnings		619			619
Total stockholders' equity		619			619
Total liabilities and stockholders' equity		337			337
Revenue		252			445
Cost of revenue		109			142
Gross profit		143			303
Income from operations		143			303
Income before income taxes		143			303
Income tax provision		30			64
Net income	113	$ 113			$ 239
Basic (in dollars per share)		$ 0.01
Net income per share - diluted (in dollars per share)		$ 0.01			$ 0.01
Comprehensive income	$ 113				$ 239
Accounts receivable					642
Inventories					339
Other assets					(2,228)
Accrued liabilities					944
Income tax liabilities					$ 64
[1]	2017 amounts have not been adjusted under the modified retrospective method.

Note 3 - Stock-based Compensa_3

Note 3 - Stock-based Compensation (Details Textual) $ / shares in Units, $ in Thousands	Dec. 31, 2015$ / sharesshares	Feb. 28, 2018USD ($)$ / sharesshares	Dec. 31, 2015$ / shares	Sep. 30, 2018USD ($)$ / sharesshares	Sep. 30, 2017USD ($)shares	Sep. 30, 2018USD ($)$ / sharesshares	Sep. 30, 2017USD ($)shares	Dec. 31, 2015USD ($)$ / shares	Nov. 13, 2014shares
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options						$ 9,625
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares						688,000
Proceeds from Stock Plans						$ 3,028	2,701
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested				$ 13,900	$ 12,500	79,000	61,300
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding				$ 465,900		$ 465,900
Share Price | $ / shares				$ 125.53		$ 125.53
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total				$ 89,300		$ 89,300
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition						3 years
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options						$ 9,600	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares						93,000
Time-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares						93,000
Time-Based RSUs [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period						4 years
Time-Based RSUs [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period						1 year
PSU 2018 [Member] | Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares		188,000
Share-based Compensation Arrangement by Share-based Payment Award, Vesting, Measurement Period of Relative Revenue Growth Rate to Industry Average		2 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		300.00%
Maximum Stock Compensation Costs		$ 46,100
PSU 2018 [Member] | Executive Officer [Member] | Vesting First Quarter of 2020 if Performance Conditions are Met [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		50.00%
PSU 2018 [Member] | Executive Officer [Member] | Quarterly Vesting of Awards Not Based on Performance [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		2 years
PSU 2018 [Member] | Non-Executive Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares		44,000
Share-based Compensation Arrangement by Share-based Payment Award, Vesting, Measurement Period of Relative Revenue Growth Rate to Industry Average		2 years
Maximum Stock Compensation Costs		$ 8,800
PSU 2018 [Member] | Non-Executive Employees [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		200.00%
PSU 2018 [Member] | Non-Executive Employees [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		300.00%
PSU 2018 [Member] | Non-Executive Employees [Member] | Vesting First Quarter of 2020 if Performance Conditions are Met [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		50.00%
PSU 2018 [Member] | Non-Executive Employees [Member] | Annual or Quarterly Vesting of Awards Not Based on Performance [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		2 years
2018 Executive PSUs and 2018 Non-executive PSUs [Member]
Share Price | $ / shares		$ 110
Share-based Compensation Arrangement by Share-based Payment Award, Price Per Share Payable Upon Vesting of Equity Instruments Other than Options | $ / shares		$ 30
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term		2 years 219 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate		27.50%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate		2.30%
2015 MPSUs [Member]
Share Price | $ / shares	$ 61.35		$ 61.35					$ 61.35
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed			500.00%
Maximum Stock Compensation Costs								$ 24,600
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate								33.20%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate								1.30%
Number of MPSU Tranches			4
Share-based Compensation Arrangement by Share-based Payment Award, Post-Award Vesting Period, Restriction Period on Sales			2 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions								7.80%
2015 MPSUs [Member] | Share-based Compensation Award, Tranche One [Member]
Maximum Stock Compensation Costs								$ 8,300
Share-based Compensation Arrangement by Share-based Payment Award, Number of Price Targets			5
Stock Price Targets Achieved							5
2015 MPSUs [Member] | Share-based Compensation Award, Tranche One [Member] | Minimum [Member]
Market Awards Price Targets | $ / shares			$ 71.36
2015 MPSUs [Member] | Share-based Compensation Award, Tranche One [Member] | Maximum [Member]
Market Awards Price Targets | $ / shares			$ 95.57
2015 MPSUs [Member] | Second, Third, and Fourth Tranches [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Price Targets			5
Total number of performance conditions			6
2015 MPSUs [Member] | Share-based Compensation Award, Tranche Two [Member]
Maximum Stock Compensation Costs								4,500
2015 MPSUs [Member] | Share-based Compensation Award, Tranche Two [Member] | Minimum [Member]
Market Awards Price Targets | $ / shares			$ 89.56
2015 MPSUs [Member] | Share-based Compensation Award, Tranche Two [Member] | Maximum [Member]
Market Awards Price Targets | $ / shares			106.81
2015 MPSUs [Member] | Share-based Compensation Award, Tranche Three [Member]
Maximum Stock Compensation Costs								5,200
2015 MPSUs [Member] | Share-based Compensation Award, Tranche Three [Member] | Minimum [Member]
Market Awards Price Targets | $ / shares			120.80
2015 MPSUs [Member] | Share-based Compensation Award, Tranche Three [Member] | Maximum [Member]
Market Awards Price Targets | $ / shares			$ 135.48
2015 MPSUs [Member] | Share-based Compensation Award, Tranche Four [Member]
Maximum Stock Compensation Costs								$ 6,600
2015 MPSUs [Member] | Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares	86,000
2015 MPSUs [Member] | Non-Executive Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares	41,000
The2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | shares									5,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares				2,700,000		2,700,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares				4,600,000		4,600,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total				$ 400		$ 400
Stock Issued During Period, Shares, Employee Stock Purchase Plans | shares				15,000	18,000	33,000	40,000
Employee Stock Purchase Plan Shares Issued, Intrinsic Value				$ 600	$ 500	$ 1,100	$ 1,000
Proceeds from Stock Plans						$ 3,000	$ 2,700

Note 3 - Stock-based Compensa_4

Note 3 - Stock-based Compensation - Stock-based Compensation Plan Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share based compensation expense	$ 14,843	$ 13,969	$ 45,765	$ 40,759
Tax benefit related to stock-based compensation	764		2,723
Cost of Sales [Member]
Share based compensation expense	471	453	1,384	1,264
Research and Development Expense [Member]
Share based compensation expense	3,979	3,838	12,168	11,297
Selling, General and Administrative Expenses [Member]
Share based compensation expense	$ 10,393	$ 9,678	$ 32,213	$ 28,198

Note 3 - Stock-based Compensa_5

Note 3 - Stock-based Compensation - RSU Summary (Details) - $ / shares shares in Thousands		6 Months Ended	9 Months Ended
		Jun. 30, 2018	Sep. 30, 2018
Beginning balance (in shares)		4,144	4,144
Weighted-Average Grant Date Fair Value Per Share, beginning balance (in dollars per share)		$ 39.91	$ 39.91
Granted (in shares)			688
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share)			$ 87.16
Vested (in shares)			(757)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)			$ 43.69
Forfeited (in shares)			(20)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share)			$ 76.57
Ending balance (in shares)			4,055
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)			$ 47.04
Time-Based RSUs [Member]
Beginning balance (in shares)		258	258
Weighted-Average Grant Date Fair Value Per Share, beginning balance (in dollars per share)		$ 66.30	$ 66.30
Granted (in shares)			93
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share)			$ 116.01
Vested (in shares)			(121)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)			$ 59.01
Forfeited (in shares)			(14)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share)			$ 82.08
Ending balance (in shares)			216
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)			$ 90.79
PSUs and MPSUs [Member]
Beginning balance (in shares)		2,266	2,266
Weighted-Average Grant Date Fair Value Per Share, beginning balance (in dollars per share)		$ 48.59	$ 48.59
Granted (in shares)	[1]		595
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share)			$ 82.64
Vested (in shares)			(636)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)			$ 40.78
Forfeited (in shares)			(6)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share)			$ 63.16
Ending balance (in shares)			2,219
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)			$ 59.92
MSUs [Member]
Beginning balance (in shares)		1,620	1,620
Weighted-Average Grant Date Fair Value Per Share, beginning balance (in dollars per share)		$ 23.57	$ 23.57
Granted (in shares)	[1]
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share)
Vested (in shares)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share)
Forfeited (in shares)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share)
Ending balance (in shares)		1,620
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share)			$ 23.57
[1]	Amount reflects the number of PSUs and MPSUs that may ultimately be earned based on management's probability assessment of the achievement of performance conditions at each reporting period. In addition, MPSUs are subject to the achievement of market conditions.

Note 3 - Stock-based Compensa_6

Note 3 - Stock-based Compensation - Valuation Assumptions (Details) - 2004 Employee Stock Plan [Member] - Employee Stock Purchase Plan [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Expected term (years) (Year)	182 days	182 days	182 days	182 days
Expected volatility	30.80%	23.50%	29.50%	23.50%
Risk-free interest rate	2.20%	1.20%	2.00%	0.90%
Dividend yield	0.90%	0.80%	1.00%	0.90%

Note 4 - Balance Sheet Compon_3

Note 4 - Balance Sheet Components - Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Raw materials	$ 41,679	$ 20,573
Work in process	43,112	40,030
Finished goods	51,999	38,678
Total	$ 136,790	$ 99,281

Note 4 - Balance Sheet Compon_4

Note 4 - Balance Sheet Components - Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Prepaid wafer purchase	$ 4,297	$ 6,217
Other prepaid expense	3,813	2,742
Interest receivable	1,413	1,352
Assets for product returns	2,320
Value-added tax receivable	396	1,235
Other	637	1,216
Total	$ 12,876	$ 12,762

Note 4 - Balance Sheet Compon_5

Note 4 - Balance Sheet Components - Other Long-term Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Deferred compensation plan assets	$ 30,425	$ 28,080
Prepaid expense	1,588	897
Other	1,258	1,091
Total	$ 33,271	$ 30,068

Note 4 - Balance Sheet Compon_6

Note 4 - Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Dividends and dividend equivalents	$ 14,737	$ 9,248
Stock rotation and sales returns	7,464	2,647
Warranty	4,934	2,416
Income tax payable	1,911	2,861
Customer prepayments	1,818	4,742
Commissions	1,334	938
Sales rebate	380	1,036
Deferred income		1,845
Other	2,330	1,774
Total	$ 34,908	$ 27,507

Note 4 - Balance Sheet Compon_7

Note 4 - Balance Sheet Components - Roll-forward of the Warranty Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Balance	$ 3,951	$ 2,627	$ 2,416	$ 1,030
Warranty provision for product sales	3,840	129	5,654	2,431
Settlements made	(36)	(161)	(100)	(710)
Unused warranty provision	(2,821)	(88)	(3,036)	(244)
Balance	$ 4,934	$ 2,507	$ 4,934	$ 2,507

Note 4 - Balance Sheet Compon_8

Note 4 - Balance Sheet Components - Long-term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Deferred compensation plan liabilities	$ 30,412	$ 28,087
Dividend equivalents	5,818	4,881
Other	83	56
Total	$ 36,313	$ 33,024

Note 5 - Goodwill and Acquisi_3

Note 5 - Goodwill and Acquisition-related Intangible Assets, Net (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill, Period Increase (Decrease), Total	$ 0		$ 0
Cost Of Revenue [Member]
Amortization of Intangible Assets, Total	$ 200	$ 500	$ 600	$ 1,500

Note 5 - Goodwill and Acquisi_4

Note 5 - Goodwill and Acquisition-related Intangible Assets, Net - Acquisition-related Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Gross Amount	$ 7,484	$ 7,484
Accumulated Amortization	(7,176)	(6,533)
Net Amount	308	951
Know-How [Member]
Gross Amount	1,018	1,018
Accumulated Amortization	(857)	(704)
Net Amount	161	314
Developed Technology Rights [Member]
Gross Amount	6,466	6,466
Accumulated Amortization	(6,319)	(5,829)
Net Amount	$ 147	$ 637

Note 5 - Goodwill and Acquisi_5

Note 5 - Goodwill and Acquisition-related Intangible Assets, Net - Future Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
2018 (remaining three months)	$ 198
2,019	110
Total	$ 308	$ 951

Note 6 - Net Income Per Share -

Note 6 - Net Income Per Share - Net Income Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	2 Months Ended	3 Months Ended		9 Months Ended
	Sep. 03, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net income	$ 31,568	$ 31,568	$ 23,642	$ 77,630	$ 53,132
Weighted-average shares outstanding, basic (in shares)		42,362	41,458	42,173	41,276
Effect of dilutive securities (in shares)		2,307	2,028	2,277	2,108
Weighted-average shares outstanding, diluted (in shares)		44,669	43,486	44,450	43,384
Earnings per share, basic (in dollars per share)		$ 0.75	$ 0.57	$ 1.84	$ 1.29
Earnings per share, diluted (in dollars per share)		$ 0.71	$ 0.54	$ 1.75	$ 1.22

Note 7 - Segment and Geograph_3

Note 7 - Segment and Geographic Information (Details Textual)	9 Months Ended
	Sep. 30, 2018
Number of Reportable Segments	1

Note 7 - Segment and Geograph_4

Note 7 - Segment and Geographic Information - Customers with Sales and Accounts Receivable Greater Than 10% (Details) - Customer Concentration Risk [Member]		3 Months Ended			9 Months Ended				12 Months Ended
		Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018		Sep. 30, 2017		Dec. 31, 2017
Distributor A [Member] | Sales Revenue, Net [Member]
Concentration risk		23.00%	17.00%		21.00%		17.00%
Distributor A [Member] | Accounts Receivable [Member]
Concentration risk					21.00%				16.00%
Distributor B [Member] | Sales Revenue, Net [Member]
Concentration risk		10.00%	15.00%	[1]	10.00%			[1]
Distributor B [Member] | Accounts Receivable [Member]
Concentration risk					16.00%					[1]
Distributor C [Member] | Sales Revenue, Net [Member]
Concentration risk	[1]
Distributor C [Member] | Accounts Receivable [Member]
Concentration risk						[1]			15.00%
[1]	Represents less than 10%.

Note 7 - Segment and Geograph_5

Note 7 - Segment and Geographic Information - Revenue by Region (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Revenue	$ 159,975	$ 128,939	[1]	$ 428,885	$ 341,499	[1]
CHINA
Revenue	91,509	66,645		245,580	185,054
TAIWAN, PROVINCE OF CHINA
Revenue	20,774	27,387		55,315	59,548
Europe [Member]
Revenue	12,579	10,726		36,696	28,227
KOREA, REPUBLIC OF
Revenue	11,406	9,279		30,046	25,594
South East Asia [Member]
Revenue	11,259	7,179		28,261	20,476
JAPAN
Revenue	6,895	4,813		18,994	14,584
UNITED STATES
Revenue	5,375	2,781		13,404	7,711
Other Region [Member]
Revenue	$ 178	$ 129		$ 589	$ 305
[1]	2017 amounts have not been adjusted under the modified retrospective method.

Note 7 - Segment and Geograph_6

Note 7 - Segment and Geographic Information - Revenue by Product Family (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Revenue	$ 159,975	$ 128,939	[1]	$ 428,885	$ 341,499	[1]
DC To DC Products [Member]
Revenue	147,727	119,089		394,492	312,700
Lighting Control Products [Member]
Revenue	$ 12,248	$ 9,850		$ 34,393	$ 28,799
[1]	2017 amounts have not been adjusted under the modified retrospective method.

Note 7 - Segment and Geograph_7

Note 7 - Segment and Geographic Information - Long Lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Long lived assets by region	$ 184,802	$ 180,238
CHINA
Long lived assets by region	92,066	89,472
UNITED STATES
Long lived assets by region	68,014	65,618
TAIWAN, PROVINCE OF CHINA
Long lived assets by region	17,033	17,238
BERMUDA
Long lived assets by region	6,879	7,522
Other Region [Member]
Long lived assets by region	$ 810	$ 388

Note 9 - Cash, Cash Equivalen_3

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash - Cash Equivalents, Short-term and Long-term Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Cash	$ 105,859	$ 75,125
Money market funds	25,235	7,134
U.S. treasuries and government agency bonds	24,230	13,024
Certificates of deposit	1,600
Total	353,105	304,346
Cash and cash equivalents	131,094	82,759
Short-term investments	216,754	216,331
Long-term investments	5,257	5,256
Corporate Debt Securities [Member]
Available-for-sale securities	190,924	203,807
Auction Rate Securities [Member]
Available-for-sale securities	$ 5,257	$ 5,256

Note 9 - Cash, Cash Equivalen_4

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash - Investment Maturity Classification (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Due in less than 1 year	$ 111,908	$ 89,399
Due in 1 - 5 years	104,846	126,932
Due in greater than 5 years	5,257	5,256
Total	$ 222,011	$ 221,587

Note 9 - Cash, Cash Equivalen_5

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash - Unrealized Gains and Losses on Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Adjusted Cost	$ 249,405	$ 230,585
Total Fair Value	247,246	229,221
Unrealized Gains	2	17
Unrealized Losses	(2,161)	(1,381)
Fair Value of Investments in Unrealized Loss Position	216,846	215,844
Money Market Funds [Member]
Adjusted Cost	25,235	7,134
Total Fair Value	25,235	7,134
Corporate Debt Securities [Member]
Adjusted Cost	192,581	204,789
Total Fair Value	190,924	203,807
Unrealized Gains	2	17
Unrealized Losses	(1,659)	(999)
Fair Value of Investments in Unrealized Loss Position	187,359	197,564
US Government Agencies Short-term Debt Securities [Member]
Adjusted Cost	24,419	13,092
Total Fair Value	24,230	13,024
Unrealized Losses	(189)	(68)
Fair Value of Investments in Unrealized Loss Position	24,230	13,024
Certificates of Deposit [Member]
Adjusted Cost	1,600
Total Fair Value	1,600
Fair Value of Investments in Unrealized Loss Position
Auction Rate Securities [Member]
Adjusted Cost	5,570	5,570
Total Fair Value	5,257	5,256
Unrealized Losses	(313)	(314)
Fair Value of Investments in Unrealized Loss Position	$ 5,257	$ 5,256

Note 9 - Cash, Cash Equivalen_6

Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash - Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Cash and cash equivalents	$ 131,094	$ 82,759
Restricted cash included in other long-term assets	115	115
Total cash, cash equivalents and restricted cash shown in the Condensed Consolidated Statements of Cash Flows	$ 131,209	$ 82,874	$ 104,539	$ 112,813

Note 10 - Fair Value Measurem_3

Note 10 - Fair Value Measurements - Financial Assets and Liabilities, Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Total Fair Value	$ 247,246	$ 229,221
Assets, fair value	263,530	245,846
Fair Value, Inputs, Level 1 [Member]
Assets, fair value	41,519	23,759
Fair Value, Inputs, Level 2 [Member]
Assets, fair value	216,754	216,831
Fair Value, Inputs, Level 3 [Member]
Assets, fair value	5,257	5,256
Money Market Funds [Member]
Total Fair Value	25,235	7,134
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	25,235	7,134
Corporate Debt Securities [Member]
Total Fair Value	190,924	203,807
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	190,924	203,807
US Government Agencies Short-term Debt Securities [Member]
Total Fair Value	24,230	13,024
US Government Agencies Short-term Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	24,230	13,024
Certificates of Deposit [Member]
Total Fair Value	1,600
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	1,600
Auction Rate Securities [Member]
Total Fair Value	5,257	5,256
Auction Rate Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	5,257	5,256
Mutual Fund [Member]
Total Fair Value	16,284	16,625
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	$ 16,284	$ 16,625

Note 10 - Fair Value Measurem_4

Note 10 - Fair Value Measurements - Discounted Cash Flow Assumptions (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Minimum [Member]
Time-to-liquidity (years) (Year)	2 years	2 years
Discount rate	5.40%	4.50%
Maximum [Member]
Time-to-liquidity (years) (Year)	3 years	3 years
Discount rate	10.50%	9.60%

Note 11 - Deferred Compensati_3

Note 11 - Deferred Compensation Plan - Summary of Deferred Compensation Plan (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Deferred compensation plan assets	$ 30,425	$ 28,080
Deferred compensation plan liabilities	30,859	28,443
Other Long-term Assets [Member]
Deferred compensation plan assets	30,425	28,080
Accrued Compensation and Related Benefits [Member]
Deferred compensation plan liabilities	447	356
Other Long-term Liabilities [Member]
Deferred compensation plan liabilities	30,412	28,087
Cash Surrender Value [Member]
Deferred compensation plan assets	14,141	11,455
Mutual Funds and Money Market Funds, Fair Value [Member]
Deferred compensation plan assets	$ 16,284	$ 16,625

Note 12 - Interest and Other _3

Note 12 - Interest and Other Income, Net - Interest and Other Income Components (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income	$ 1,583	$ 1,346	$ 4,606	$ 3,938
Amortization of premium on available-for-sale securities	(314)	(490)	(1,122)	(1,494)
Gain on deferred compensation plan investments	717	636	949	1,902
Foreign currency exchange gain (loss)	700	(237)	915	(473)
Other	28		39
Total	$ 2,714	$ 1,255	$ 5,387	$ 3,873

Note 13 - Income Taxes (Details

Note 13 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Expense (Benefit), Total	$ 4,639		$ 1,445	$ 8,168	$ 3,112
Effective Income Tax Rate Reconciliation, Percent, Total	12.80%		5.80%	9.50%	5.50%
GILTI Tax	$ 18,400			$ 46,200
Payment for the Transition Tax		$ 1,900
Unrecognized Tax Benefits, Ending Balance	18,100			18,100		$ 16,300
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	11,200			11,200		9,100
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	800			800		$ 500
Accrued Liabilities, Current [Member]
Transition Tax Liability	1,900			1,900
Income Tax Liabilities, Noncurrent [Member]
Transition Tax Liability	$ 20,100			$ 20,100

Note 14 - Accumulated Other C_3

Note 14 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Balance			$ 522,007
Balance	$ 610,164
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Balance	(2,409)	$ (2,524)	(1,364)
Other comprehensive income (loss) before reclassifications	242	94	(1,185)
Amounts reclassified from accumulated other comprehensive income (loss)	8	21	25
Tax effect	241
Net current period other comprehensive income (loss)	491	115	(1,160)
Balance	(1,918)	(2,409)	(2,524)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	704	7,566	3,177
Other comprehensive income (loss) before reclassifications	(4,526)	(6,862)	4,389
Amounts reclassified from accumulated other comprehensive income (loss)
Tax effect
Net current period other comprehensive income (loss)	(4,526)	(6,862)	4,389
Balance	(3,822)	704	7,566
AOCI Attributable to Parent [Member]
Balance	(1,705)	5,042	1,813
Other comprehensive income (loss) before reclassifications	(4,284)	(6,768)	3,204
Amounts reclassified from accumulated other comprehensive income (loss)	8	21	25
Tax effect	241
Net current period other comprehensive income (loss)	(4,035)	(6,747)	3,229
Balance	$ (5,740)	$ (1,705)	$ 5,042

Note 15 - Dividends and Divid_3

Note 15 - Dividends and Dividend Equivalents (Details Textual) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Dividends Payable, Current	$ 12.7	$ 8.3
Accrued Dividend Equivalents	$ 7.8	$ 5.8

Note 15 - Dividends and Divid_4

Note 15 - Dividends and Dividend Equivalents - Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Cash dividends declared per common share (in dollars per share)	$ 0.30	$ 0.20	$ 0.90	$ 0.60
Total amount	$ 12,722	$ 8,301	$ 38,052	$ 24,822

Note 16 - Subsequent Event (Det

Note 16 - Subsequent Event (Details Textual)	Oct. 31, 2018$ / shares	Oct. 31, 2018shares	Mar. 31, 2021	Sep. 30, 2018shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				688,000
MSUs 2018 [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		500.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Price Targets	5
MSUs 2018 [Member] | Subsequent Event [Member] | Minimum [Member]
Market Awards Price Targets | $ / shares	$ 140
MSUs 2018 [Member] | Subsequent Event [Member] | Maximum [Member]
Market Awards Price Targets | $ / shares	$ 172
MSUs 2018 [Member] | Executive Officer [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		60,000
MSUs 2018 [Member] | Non-Executive Employees [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		60,000
PSUs 2019 [Member] | Non-Executive Employees [Member] | Scenario, Forecast [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			50.00%
PSUs 2019 [Member] | Non-Executive Employees [Member] | Scenario, Forecast [Member] | Annual or Quarterly Vesting of Awards Not Based on Performance [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			2 years
PSUs 2019 [Member] | Non-Executive Employees [Member] | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		53,000
Share-based Compensation Arrangement by Share-based Payment Award, Vesting, Measurement Period of Relative Revenue Growth Rate to Industry Average		2 years
PSUs 2019 [Member] | Non-Executive Employees [Member] | Subsequent Event [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		200.00%
PSUs 2019 [Member] | Non-Executive Employees [Member] | Subsequent Event [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed		300.00%