10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2019

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission file number: 000-51026

Monolithic Power Systems, Inc.

(Exact name of registrant as specified in its charter)

Delaware	77-0466789
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

4040 Lake Washington Blvd. NE, Suite 201, Kirkland, Washington 98033

(Address of principal executive offices)(Zip code)

  (425) 296-9956

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, par value $0.001 per share	MPWR	The NASDAQ Global Select Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☒	Accelerated filer ☐	Non-accelerated filer ☐
Smaller reporting company ☐	Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

There were 43,244,000 shares of the registrant’s common stock issued and outstanding as of July 29, 2019.

1

MONOLITHIC POWER SYSTEMS, INC.

TABLE OF CONTENTS		PAGE
PART I. FINANCIAL INFORMATION		3
ITEM 1.	FINANCIAL STATEMENTS (Unaudited)	3
	CONDENSED CONSOLIDATED BALANCE SHEETS	3
	CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS	4
	CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME	5
	CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY	6
	CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS	7
	NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS	8
ITEM 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	22
ITEM 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	28
ITEM 4.	CONTROLS AND PROCEDURES	29
PART II. OTHER INFORMATION		29
ITEM 1.	LEGAL PROCEEDINGS	29
ITEM1A.	RISK FACTORS	29
ITEM 6.	EXHIBITS	45

2

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

MONOLITHIC POWER SYSTEMS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except par value)

(unaudited)

	June 30,			December 31,
	2019			2018
ASSETS
Current assets:
Cash and cash equivalents	$	197,012		$	172,704
Short-term investments		169,459			204,577
Accounts receivable, net		55,398			55,214
Inventories		143,622			136,384
Other current assets		19,645			11,931
Total current assets		585,136			580,810
Property and equipment, net		213,830			150,001
Long-term investments		3,215			3,241
Goodwill		6,571			6,571
Deferred tax assets, net		16,686			16,830
Other long-term assets		42,675			35,979
Total assets	$	868,113		$	793,432
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	26,544		$	22,678
Accrued compensation and related benefits		22,960			18,799
Other accrued liabilities		38,616			38,962
Total current liabilities		88,120			80,439
Income tax liabilities		32,402			34,375
Other long-term liabilities		43,437			38,525
Total liabilities		163,959			153,339
Commitments and contingencies
Stockholders' equity:
Common stock and additional paid-in capital: $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 43,234 and 42,505, respectively		503,759			450,908
Retained earnings		204,533			194,728
Accumulated other comprehensive loss		(4,138	)		(5,543	)
Total stockholders’ equity		704,154			640,093
Total liabilities and stockholders’ equity	$	868,113		$	793,432

See accompanying notes to unaudited condensed consolidated financial statements.

3

MONOLITHIC POWER SYSTEMS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per-share amounts)

(unaudited)

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Revenue	$	151,007	$	139,761	$	292,370	$	268,911
Cost of revenue		67,782		62,197		131,139		119,852
Gross profit		83,225		77,564		161,231		149,059
Operating expenses:
Research and development		27,545		23,481		53,003		45,091
Selling, general and administrative		35,058		28,561		65,611		55,879
Litigation expense		503		640		781		1,171
Total operating expenses		63,106		52,682		119,395		102,141
Income from operations		20,119		24,882		41,836		46,918
Interest and other income, net		2,229		2,232		5,569		2,673
Income before income taxes		22,348		27,114		47,405		49,591
Income tax expense		1,655		2,908		531		3,529
Net income	$	20,693	$	24,206	$	46,874	$	46,062
Net income per share:
Basic	$	0.48	$	0.57	$	1.09	$	1.09
Diluted	$	0.45	$	0.55	$	1.03	$	1.04
Weighted-average shares outstanding:
Basic		43,109		42,237		42,929		42,079
Diluted		45,483		44,400		45,358		44,341

See accompanying notes to unaudited condensed consolidated financial statements.

4

MONOLITHIC POWER SYSTEMS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

(unaudited)

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Net income	$	20,693		$	24,206		$	46,874		$	46,062
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments		(3,709	)		(6,862	)		(32	)		(2,473	)
Change in unrealized gain (loss) on available-for-sale securities, net of tax of $(64), $0, $(162) and $0, respectively		611			115			1,437			(1,045	)
Other comprehensive income (loss), net of tax		(3,098	)		(6,747	)		1,405			(3,518	)
Comprehensive income	$	17,595		$	17,459		$	48,279		$	42,544

See accompanying notes to unaudited condensed consolidated financial statements.

5

MONOLITHIC POWER SYSTEMS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(in thousands, except per-share amounts)

(unaudited)

								Accumulated
	Common Stock and							Other			Total
	Additional Paid-in Capital				Retained			Comprehensive			Stockholders’
Three Months Ended June 30, 2019	Shares		Amount		Earnings			Loss			Equity
Balance as of April 1, 2019		43,033	$	478,913	$	202,378		$	(1,040	)	$	680,251
Net income		-		-		20,693			-			20,693
Other comprehensive loss		-		-		-			(3,098	)		(3,098	)
Dividends and dividend equivalents declared ($0.40 per share)		-		-		(18,538	)		-			(18,538	)
Vesting of restricted stock units		201		2,088		-			-			2,088
Stock-based compensation expense		-		22,758		-			-			22,758
Balance as of June 30, 2019		43,234	$	503,759	$	204,533		$	(4,138	)	$	704,154

								Accumulated
	Common Stock and							Other			Total
	Additional Paid-in Capital				Retained			Comprehensive			Stockholders’
Three Months Ended June 30, 2018	Shares		Amount		Earnings			Income (Loss)			Equity
Balance as of April 1, 2018		42,145	$	401,007	$	152,257		$	5,042		$	558,306
Net income		-		-		24,206			-			24,206
Other comprehensive loss		-		-		-			(6,747	)		(6,747	)
Dividends and dividend equivalents declared ($0.30 per share)		-		-		(13,604	)		-			(13,604	)
Exercise of stock options		3		43		-			-			43
Vesting of restricted stock units		137		916		-			-			916
Stock-based compensation expense		-		15,900		-			-			15,900
Balance as of June 30, 2018		42,285	$	417,866	$	162,859		$	(1,705	)	$	579,020

								Accumulated
	Common Stock and							Other			Total
	Additional Paid-in Capital				Retained			Comprehensive			Stockholders’
Six Months Ended June 30, 2019	Shares		Amount		Earnings			Loss			Equity
Balance as of January 1, 2019		42,505	$	450,908	$	194,728		$	(5,543	)	$	640,093
Net income		-		-		46,874			-			46,874
Other comprehensive income		-		-		-			1,405			1,405
Dividends and dividend equivalents declared ($0.80 per share)		-		-		(37,069	)		-			(37,069	)
Vesting of restricted stock units		715		12,471		-			-			12,471
Shares issued under the employee stock purchase plan		14		1,627		-			-			1,627
Stock-based compensation expense		-		38,753		-			-			38,753
Balance as of June 30, 2019		43,234	$	503,759	$	204,533		$	(4,138	)	$	704,154

								Accumulated
	Common Stock and							Other			Total
	Additional Paid-in Capital				Retained			Comprehensive			Stockholders’
Six Months Ended June 30, 2018	Shares		Amount		Earnings			Income (Loss)			Equity
Balance as of January 1, 2018		41,614	$	376,586	$	143,608		$	1,813		$	522,007
Net income		-		-		46,062			-			46,062
Other comprehensive loss		-		-		-			(3,518	)		(3,518	)
Dividends and dividend equivalents declared ($0.60 per share)		-		-		(27,190	)		-			(27,190	)
Exercise of stock options		4		59		-			-			59
Vesting of restricted stock units		649		8,709		-			-			8,709
Shares issued under the employee stock purchase plan		18		1,562		-			-			1,562
Stock-based compensation expense		-		30,950		-			-			30,950
Cumulative effect of a change in accounting principles		-		-		379			-			379
Balance as of June 30, 2018		42,285	$	417,866	$	162,859		$	(1,705	)	$	579,020

See accompanying notes to unaudited condensed consolidated financial statements.

6

MONOLITHIC POWER SYSTEMS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)

	Six Months Ended June 30,
	2019			2018
Cash flows from operating activities:
Net income	$	46,874		$	46,062
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		6,994			5,830
Loss on sales of property and equipment		15			-
Amortization of premium on available-for-sale securities		216			808
Gain on deferred compensation plan investments		(2,555	)		(233	)
Deferred taxes, net		(20	)		12
Stock-based compensation expense		38,719			30,921
Changes in operating assets and liabilities:
Accounts receivable		(176	)		(16,325	)
Inventories		(7,205	)		(29,602	)
Other assets		(42	)		(983	)
Accounts payable		2,153			3,032
Accrued compensation and related benefits		4,124			103
Accrued liabilities		423			539
Income tax liabilities		(6,627	)		1,546
Net cash provided by operating activities		82,893			41,710
Cash flows from investing activities:
Purchases of property and equipment		(77,638	)		(12,998	)
Acquisition of in-place leases		(981	)		-
Purchases of short-term investments		(21,546	)		(67,002	)
Proceeds from maturities and sales of short-term investments		57,999			51,059
Proceeds from sales of long-term investments		75			-
Proceeds from sales of property and equipment		1,456			-
Contributions to deferred compensation plan, net		(1,435	)		(911	)
Net cash used in investing activities		(42,070	)		(29,852	)
Cash flows from financing activities:
Property and equipment purchased on extended payment terms		(3	)		-
Proceeds from exercise of stock options		-			59
Proceeds from vesting of restricted stock units		12,471			8,709
Proceeds from shares issued under the employee stock purchase plan		1,627			1,562
Dividends and dividend equivalents paid		(30,784	)		(21,467	)
Net cash used in financing activities		(16,689	)		(11,137	)
Effect of change in exchange rates		175			(407	)
Net increase in cash, cash equivalents and restricted cash		24,309			314
Cash, cash equivalents and restricted cash, beginning of period		172,818			82,874
Cash, cash equivalents and restricted cash, end of period	$	197,127		$	83,188
Supplemental disclosures for cash flow information:
Cash paid for taxes	$	7,168		$	3,884
Non-cash investing and financing activities:
Liability accrued for property and equipment purchases	$	3,028		$	2,939
Liability accrued for dividends and dividend equivalents	$	19,749		$	14,530

See accompanying notes to unaudited condensed consolidated financial statements.

7

MONOLITHIC POWER SYSTEMS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. BASIS OF PRESENTATION

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-K for the year ended  December 31, 2018, filed with the SEC on  March 1, 2019.

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-Q are not necessarily indicative of the results that  may be expected for the year ending  December 31, 2019 or for any other future periods.

Summary of Significant Accounting Policies

Except for the changes related to leases discussed in Note 6, there have been no other changes to the Company’s significant accounting policies during the three and six months ended  June 30, 2019, as compared to the significant accounting policies described in the Company’s audited consolidated financial statements included in the Annual Report on Form 10-K for the year ended  December 31, 2018.

Recently Adopted Accounting Pronouncement

In  February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02, Leases (Topic 842), which requires entities to recognize right-of-use (“ROU”) assets and lease liabilities on the balance sheets for leases with terms greater than 12 months. In addition, the standard applies to leases embedded in service or other arrangements. The Company adopted the standard on January 1, 2019 using the modified retrospective method and did not restate comparative periods, as permitted by the standard. In addition, the Company elected the transition practical expedients to not reassess its contracts that existed prior to January 1, 2019.

Upon adoption, the Company recognized ROU assets and lease liabilities of its outstanding operating leases on the Condensed Consolidated Balance Sheets, primarily related to real estate. The adoption did not have a material impact on the Condensed Consolidated Statements of Operations or the Condensed Consolidated Statements of Cash Flows. See Note 6 for further discussion.

Recent Accounting Pronouncements Not Yet Adopted as of June 30, 2019

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework — Changes to the Disclosure Requirements for Fair Value Measurement, which changes certain disclosure requirements, including those related to Level 3 fair value measurements. The standard will be effective for annual reporting periods beginning after December 15, 2019. Early adoption is permitted. The Company is evaluating the impact of the adoption on its disclosures.

In  January 2017, the FASB issued ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 350), which simplifies the accounting for goodwill impairment. The guidance removes step two of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. Entities will continue to have the option to perform a qualitative assessment to determine if a quantitative impairment test is necessary. The standard will be applied prospectively, and will be effective for annual reporting periods beginning after  December 15, 2019. Early adoption is permitted. The Company is evaluating the impact of the adoption on its annual goodwill impairment test.

8

In  June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326), which introduces a model based on expected losses to estimate credit losses for most financial assets and certain other instruments. In addition, for available-for-sale debt securities, entities will be required to recognize an allowance for credit losses rather than reductions in the amortized cost of the securities. The standard will be effective for annual reporting periods beginning after  December 15, 2019, with early adoption permitted for annual reporting periods beginning after  December 15, 2018. Entities will apply the standard by recording a cumulative-effect adjustment to retained earnings. The Company is evaluating the impact of the adoption on its consolidated financial position, results of operations, cash flows and disclosures.

2. REVENUE RECOGNITION

Revenue from Product Sales

The Company generates revenue primarily from product sales, which include assembled and tested integrated circuits, as well as dies in wafer form. These product sales were 99% and 98% of the Company’s total revenue for the three months ended June 30, 2019 and 2018, respectively, and 99% and 97% of the Company’s total revenue for the six months ended June 30, 2019 and 2018, respectively. The remaining revenue primarily includes royalty revenue from licensing arrangements and revenue from wafer testing services performed for third parties, which have not been significant in all periods presented. See Note 8 for the disaggregation of the Company’s revenue by geographic regions and by product families.

The Company sells its products primarily through third-party distributors, value-added resellers, original equipment manufacturers, original design manufacturers and electronic manufacturing service providers. For the three months ended June 30, 2019 and 2018, 77% and 86%, respectively, of the Company’s sales were made through distribution arrangements. For the six months ended June 30, 2019 and 2018, 80% and 87%, respectively, of the Company’s sales were made through distribution arrangements. These distribution arrangements contain enforceable rights and obligations specific to those distributors and not the end customers. Purchase orders, which are generally governed by sales agreements or the Company's standard terms of sale, set the final terms for unit price, quantity, shipping and payment agreed by both parties. The Company considers purchase orders to be the contracts with customers. The unit price as stated on the purchase orders is considered the observable, stand-alone selling price for the arrangements.

The Company recognizes revenue when it satisfies a performance obligation by transferring control of the promised goods or services to its customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. The Company excludes taxes assessed by government authorities, such as sales taxes, from revenue.

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 recognized when the products are shipped and delivered to be held at customers’ designated locations because the Company continues to control the products and retain ownership, and the customers do not have an unconditional obligation to pay. The Company recognizes revenue when the customers consume the products from the consigned inventory locations or, in some cases, after a 60-day period from the delivery date has passed, at which time control transfers to the customers and the Company invoices them for payment.

Variable Consideration

The Company accounts for price adjustment and stock rotation rights as variable consideration that reduces the transaction price, and recognizes that reduction in the same period the associated 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 an analysis 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 have price adjustment rights. The Company records a credit against accounts receivable for the estimated price adjustments, with a corresponding reduction to revenue.

In addition, certain distributors have limited stock rotation rights that permit the return of a small percentage of the previous six months’ purchases in accordance with the contract terms. The Company estimates the stock rotation returns based on an analysis of historical returns, and the current level of inventory in the distribution channel. The Company records a liability for the stock rotation reserve, with a corresponding reduction to revenue. In addition, the Company recognizes an asset for product returns which represents the right to recover products from the customers related to stock rotations, with a corresponding reduction to cost of revenue.

9

Contract Balances

The Company records a receivable when it has an unconditional right to receive consideration after the performance obligations are satisfied. As of  June 30, 2019 and December 31, 2018, accounts receivable totaled $55.4 million and $55.2 million, respectively. The Company did not record any allowance for doubtful accounts as of June 30, 2019 and December 31, 2018.

For certain customers located in Asia, the Company requires cash payments 2 weeks before the products are scheduled to be shipped to the customers. The Company records these payments received in advance of performance as customer prepayments within current accrued liabilities. As of  June 30, 2019 and December 31, 2018, customer prepayments totaled $3.2 million and $2.5 million, respectively. The increase in the customer prepayment balance for the six months ended June 30, 2019 resulted from an increase in unfulfilled customer orders for which the Company has received payments. For the six months ended  June 30, 2019, the Company recognized $2.5 million of revenue that was included in the customer prepayment balance as of  December 31, 2018.

Contract Costs

The Company pays sales commissions based on the achievement of pre-determined product sales targets. As the Company recognizes product sales at a point in time, sales commissions are expensed as incurred.

Practical Expedients

The Company’s standard payment terms generally require customers to pay 30 to 60 days after the Company satisfies the performance obligations. For those customers who are required to pay in advance, the Company satisfies the performance obligations generally within 2 weeks. The Company has elected not to determine whether contacts with customers contain significant financing components.

As of  June 30, 2019, the Company’s unsatisfied performance obligations primarily included products held in consignment arrangements and customer purchase orders for products that the Company has not yet shipped. Because the Company expects to fulfill these performance obligations within one year, the Company has elected not to disclose the amount of these remaining performance obligations or the timing of recognition.

3. STOCK-BASED COMPENSATION

2014 Equity Incentive Plan (the “2014 Plan”)

The Board of Directors adopted the 2014 Plan in  April 2013, and the stockholders approved it in  June 2013. In  October 2014, the Board of Directors approved certain amendments to the 2014 Plan. The 2014 Plan, as amended, became effective on  November 13, 2014 and provides for the issuance of up to 5.5 million shares. The 2014 Plan will expire on  November 13, 2024. As of  June 30, 2019, 1.6 million shares remained available for future issuance under the 2014 Plan. 

Stock-Based Compensation Expense

The Company recognized stock-based compensation expenses as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Cost of revenue	$	663	$	480	$	1,193	$	913
Research and development		5,412		4,194		9,841		8,188
Selling, general and administrative		16,634		11,218		27,685		21,820
Total stock-based compensation expense	$	22,709	$	15,892	$	38,719	$	30,921
Tax benefit related to stock-based compensation	$	706	$	829	$	1,544	$	1,959

Restricted Stock Units (“RSUs”)

The Company’s RSUs include time-based RSUs, RSUs with performance conditions (“PSUs”), RSUs with market conditions (“MSUs”), and RSUs with both market and performance conditions (“MPSUs”). Vesting of awards with performance conditions or market conditions is subject to the achievement of pre-determined performance goals and the approval of such achievement by the Compensation Committee of the Board of Directors (the “Compensation Committee”). All awards include service conditions which require continued employment with the Company.

10

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, 2019		240		$	95.38		2,174		$	61.61		2,219		$	35.69		4,633		$	50.94
Granted		44		$	140.59		440	(1)	$	103.02		-		$	-		484		$	106.41
Vested		(68	)	$	80.27		(485	)	$	55.36		(162	)	$	23.57		(715	)	$	50.52
Forfeited		(4	)	$	106.51		-		$	-		(4	)	$	68.48		(8	)	$	87.85
Outstanding at June 30, 2019		212		$	109.33		2,129		$	71.60		2,053		$	36.58		4,394		$	57.05

(1) Amount reflects the number of PSUs that  may ultimately be earned based on management’s probability assessment of the achievement of performance conditions at each reporting period.

The intrinsic value related to vested RSUs was $26.3 million and $15.6 million for the three months ended June 30, 2019 and 2018, respectively. The intrinsic value related to vested RSUs was $84.0 million and $65.2 million for the six months ended June 30, 2019 and 2018, respectively. As of June 30, 2019, the total intrinsic value of all outstanding RSUs was $551.2 million, based on the closing stock price of $135.78. As of June 30, 2019, unamortized compensation expense related to all outstanding RSUs was $136.5 million with a weighted-average remaining recognition period of approximately 3.5 years. 

Cash proceeds from vested PSUs with a purchase price totaled $12.5 million and $8.7 million for the six months ended June 30, 2019 and 2018, respectively. 

Time-Based RSUs:

For the six months ended June 30, 2019, the Compensation Committee granted 44,000 RSUs with service conditions to non-executive employees and non-employee directors. The RSUs vest over 4 years for employees and 1 year for directors, subject to continued service with the Company.  

2019 PSUs:

In  February 2019, the Compensation Committee granted 151,000 PSUs to the executive officers, which represent a target number of shares to be earned based on the Company’s average 2-year (2019 and 2020) revenue growth rate compared against the analog industry’s average two-year revenue growth rate as published by the Semiconductor Industry Association (“2019 Executive PSUs”). The maximum number of shares that an executive officer can earn is 300% of the target number of the 2019 Executive PSUs. 50% of the 2019 Executive PSUs will vest in the first quarter of 2021 if the pre-determined performance goals are met during the performance period. The remaining 2019 Executive PSUs will vest over the following 2 years on a quarterly basis. Assuming the achievement of the highest level of performance goals, the total stock-based compensation cost for the 2019 Executive PSUs is $46.6 million.

The 2019 Executive PSUs contain a purchase price feature, which requires the employees to pay the Company $30 per share upon vesting of the shares. Shares that do not vest will not be subject to the purchase price payment. The Company determined the grant date fair value of the 2019 Executive PSUs using the Black-Scholes model with the following assumptions: stock price of $130.67, expected term of 2.6 years, expected volatility of 29.0% and risk-free interest rate of 2.5%.

Employee Stock Purchase Plan (“ESPP”)

No shares were issued under the ESPP for the three months ended June 30, 2019 and 2018. For the six months ended June 30, 2019 and 2018, 14,000 and 18,000 shares, respectively, were issued under the ESPP. As of June 30, 2019, 4.5 million shares were available for future issuance.

11

The intrinsic value of the shares issued was $0.3 million and $0.5 million for the six months ended June 30, 2019 and 2018, respectively. As of June 30, 2019, the unamortized expense was $0.1 million, which will be recognized through the third quarter of 2019. The Black-Scholes model was used to value the employee stock purchase rights with the following weighted-average assumptions: 

	Six Months Ended June 30,
	2019			2018
Expected term (in years)		0.5			0.5
Expected volatility		37.3	%		28.2	%
Risk-free interest rate		2.5	%		1.8	%
Dividend yield		1.2	%		1.0	%

Cash proceeds from the shares issued under the ESPP were $1.6 million for both the six months ended June 30, 2019 and 2018.  

4. BALANCE SHEET COMPONENTS

Inventories 

Inventories consist of the following (in thousands): 

	June 30,		December 31,
	2019		2018
Raw materials	$	42,278	$	43,017
Work in process		36,390		38,674
Finished goods		64,954		54,693
Total	$	143,622	$	136,384

Other Current Assets

Other current assets consist of the following (in thousands):

	June 30,		December 31,
	2019		2018
Asset held for sale	$	7,076	$	-
RSU tax withholding proceeds receivable		4,522		39
Prepaid expense		2,913		3,425
Interest receivable		1,516		1,441
Assets for product returns		1,274		1,602
Value-added tax receivable		590		423
Prepaid wafer refund receivable		-		4,297
Other		1,754		704
Total	$	19,645	$	11,931

Other Long-Term Assets

Other long-term assets consist of the following (in thousands):

	June 30,		December 31,
	2019		2018
Deferred compensation plan assets	$	35,961	$	31,970
Operating lease ROU assets		2,688		-
Prepaid expense		2,520		2,713
Other		1,506		1,296
Total	$	42,675	$	35,979

12

Other Accrued Liabilities

Other accrued liabilities consist of the following (in thousands): 

	June 30,		December 31,
	2019		2018
Dividends and dividend equivalents	$	21,554	$	15,044
Stock rotation and sales returns		4,339		5,363
Customer prepayments		3,203		2,520
Income tax payable		2,359		7,018
Warranty		1,748		4,564
Operating lease liabilities		1,097		-
Commissions		945		1,369
Other		3,371		3,084
Total	$	38,616	$	38,962

Other Long-Term Liabilities

Other long-term liabilities consist of the following (in thousands):

	June 30,		December 31,
	2019		2018
Deferred compensation plan liabilities	$	36,594	$	32,283
Dividend equivalents		5,921		6,145
Operating lease liabilities		893		-
Other		29		97
Total	$	43,437	$	38,525

5. REAL ESTATE TRANSACTION

In March 2019, the Company completed the purchase of an office building and land located in Kirkland, Washington for $52.9 million in cash. The property also has in-place leases which were assumed by the Company. The Company accounted for the purchase as an asset acquisition and capitalized $0.4 million of transaction costs.

The purchase price allocation was as follows (in thousands):

Building	$	30,078
Land		22,254
In-place leases		981
Total	$	53,313

The fair value of the building was determined based on the income approach, which considered the discounted cash flows and direct capitalization analysis, and the sales comparison approach. The fair value of land was determined based on the sales comparison approach. The fair value of the in-place leases was determined primarily based on the analysis of the economic benefits of certain cost savings to acquire new tenants.

The building is depreciated over a useful life of 40 years and the in-place leases are amortized over the average remaining lease terms of 3.5 years. Land is not depreciated.

6. LEASES

Lessee

The Company has operating leases for administrative and sales and marketing offices, manufacturing operations and research and development facilities, employee housing units, and certain equipment. The leases have remaining lease terms from less than a year to 4 years. Some of the leases include options to renew the lease term for up to 5 years or on a month-to-month basis. The Company does not have finance lease arrangements.

13

As permitted by Topic 842, the Company does not recognize leases with a term of 12 months or less at the commencement date on the Condensed Consolidated Balance Sheets. For those lease arrangements that contain lease and nonlease components, the Company has elected the practical expedient to combine them as single lease components. As of June 30, 2019, operating lease ROU assets totaled $2.7 million and operating lease liabilities totaled $2.0 million. The Company recognizes operating lease costs on a straight-line basis over the lease term.

Because the implicit rate in each lease is not readily determinable, the Company uses its incremental borrowing rate to determine the present value of the remaining lease payments. 

The following tables summarize certain information related to the leases (in thousands, except for years and percentages):

	Three Months Ended		Six Months Ended
	June 30, 2019		June 30, 2019
Lease costs:
Operating lease costs	$	332	$	637
Short-term lease costs		84		182
Total lease costs	$	416	$	819

	Three Months Ended		Six Months Ended
	June 30, 2019		June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	423	$	727
ROU assets obtained in exchange for operating lease liabilities (1)	$	317	$	2,581

	June 30, 2019
Weighted-average remaining lease term (in years)		2.2
Weighted-average discount rate		4.2	%

(1) For the six months ended June 30, 2019, the amount includes $2.2 million for operating leases existing on January 1, 2019.

As of June 30, 2019, the maturities of the lease liabilities are as follows (in thousands):

2019 (remaining six months)	$	569
2020		954
2021		348
2022		210
2023		57
Total remaining lease payments		2,138
Less: imputed interest		(148	)
Total lease liabilities	$	1,990
Reported as:
Current liabilities	$	1,097
Long-term liabilities	$	893

14

Lessor 

The Company owns certain office buildings and leases a portion of these properties to third parties under arrangements that are classified as operating leases. The leases have remaining lease terms from less than a year to 5 years. Some of the leases include options to renew the lease term for up to 5 years.

For the three and six months ended June 30, 2019, income related to lease payments was $0.7 million and $0.9 million, respectively. As of  June 30, 2019, future income related to lease payments is as follows (in thousands):

2019 (remaining six months)	$	703
2020		1,105
2021		880
2022		427
2023		91
2024		12
Total income related to lease payments	$	3,218

7. NET INCOME PER SHARE

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 fulfill their service requirement and the awards do not vest. Accordingly, these awards are not treated as participating securities in the net income per share calculation. 

The following table sets forth the computation of basic and diluted net income per share (in thousands, except per-share amounts): 

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Numerator:
Net income	$	20,693	$	24,206	$	46,874	$	46,062
Denominator:
Weighted-average outstanding shares used to compute basic net income per share		43,109		42,237		42,929		42,079
Effect of dilutive securities		2,374		2,163		2,429		2,262
Weighted-average outstanding shares used to compute diluted net income per share		45,483		44,400		45,358		44,341
Net income per share:
Basic	$	0.48	$	0.57	$	1.09	$	1.09
Diluted	$	0.45	$	0.55	$	1.03	$	1.04

8. SEGMENT AND GEOGRAPHIC INFORMATION

The Company operates in one reportable segment that includes the design, development, marketing and sale of high-performance analog solutions for the computing and storage, automotive, industrial, communications and consumer markets. The Company’s chief operating decision maker is its Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. The Company derives a majority of its revenue from sales to customers located outside North America, with geographic revenue based on the customers’ ship-to locations.  

15

The Company sells its products primarily through third-party distributors and value-added resellers, and directly to original equipment manufacturers, original design manufacturers and electronic manufacturing service providers. The following table summarizes those customers with sales equal to 10% or more of the Company's total revenue, or with accounts receivable balances equal to 10% or more of the Company’s total accounts receivable: 

	Revenue												Accounts Receivable
	Three Months Ended June 30,						Six Months Ended June 30,						June 30,			December 31,
Customer	2019			2018			2019			2018			2019			2018
Company A (distributor)		22	%		20	%		22	%		20	%		21	%		25	%
Company B (distributor)		*			10	%		*			10	%		12	%		16	%
Company A (direct)		13	%		*			10	%		*			16	%		*

* Represents less than 10%.

The Company’s agreements with third-party distributors were made in the ordinary course of business and  may be terminated with or without cause by these customers with advance notice. Although the Company  may experience a short-term disruption in the distribution of its products and a short-term decline in revenue if its agreement with any of these customers was terminated, the Company believes that such termination would not have a material adverse effect on its financial statements because it would be able to engage alternative distributors, resellers and other distribution channels to deliver its products to end customers within a short period following the termination of the agreement with the customer.  

The following is a summary of revenue by geographic regions (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
Country or Region	2019		2018		2019		2018
China	$	94,837	$	81,207	$	171,035	$	154,072
Taiwan		16,018		18,150		37,365		34,541
Europe		13,040		12,651		26,024		24,116
Korea		9,623		8,853		19,234		18,640
Southeast Asia		7,122		7,977		15,794		17,002
Japan		6,292		6,486		12,934		12,100
United States		4,013		4,274		9,819		8,029
Other		62		163		165		411
Total	$	151,007	$	139,761	$	292,370	$	268,911

The following is a summary of revenue by product family (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
Product Family	2019		2018		2019		2018
DC to DC	$	139,691	$	127,496	$	272,402	$	246,765
Lighting Control		11,316		12,265		19,968		22,146
Total	$	151,007	$	139,761	$	292,370	$	268,911

The following is a summary of property and equipment, net, by geographic regions (in thousands):

	June 30,		December 31,
Country	2019		2018
China	$	101,872	$	93,096
United States		94,296		39,054
Taiwan		16,795		16,972
Other		867		879
Total	$	213,830	$	150,001

16

9. COMMITMENTS AND CONTINGENCIES

Product Warranties

The following table presents changes in the warranty reserve (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Balance at beginning of period	$	2,045		$	3,740		$	4,564		$	2,416
Warranty provision for product sales		311			335			579			1,814
Settlements made		(28	)		(9	)		(2,299	)		(64	)
Unused warranty provision		(580	)		(115	)		(1,096	)		(215	)
Balance at end of period	$	1,748		$	3,951		$	1,748		$	3,951

Purchase Commitments

The Company has outstanding purchase commitments with its suppliers and other parties that require the future purchase of goods or services, which primarily consist of wafer purchases, assembly and other manufacturing services, construction services and license arrangements. As of  June 30, 2019, the Company’s outstanding purchase obligations totaled approximately $71.4 million.

Litigation

The Company is a party to actions and proceedings in the ordinary course of business, including potential litigation initiated by its stockholders, 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 require the expenditure of significant funds and the diversion of other resources to prosecute and defend. The Company defends itself vigorously against any such claims. As of  June 30, 2019, there were no material pending legal proceedings to which the Company was a party.

10. CASH, CASH EQUIVALENTS, INVESTMENTS AND RESTRICTED CASH

The following is a summary of the Company’s cash, cash equivalents and investments (in thousands): 

	June 30,		December 31,
	2019		2018
Cash, cash equivalents and investments:
Cash	$	155,192	$	131,569
Money market funds		41,820		41,135
Corporate debt securities		135,548		170,909
U.S. treasuries and government agency bonds		32,311		32,068
Certificates of deposit		1,600		1,600
Auction-rate securities backed by student-loan notes		3,215		3,241
Total	$	369,686	$	380,522

	June 30,		December 31,
	2019		2018
Reported as:
Cash and cash equivalents	$	197,012	$	172,704
Short-term investments		169,459		204,577
Long-term investments		3,215		3,241
Total	$	369,686	$	380,522

The contractual maturities of the Company’s short-term and long-term available-for-sale investments are as follows (in thousands):

	June 30,		December 31,
	2019		2018
Due in less than 1 year	$	123,930	$	125,845
Due in 1 - 5 years		45,529		78,732
Due in greater than 5 years		3,215		3,241
Total	$	172,674	$	207,818

17

The following tables summarize the unrealized gain and loss positions related to the Company’s available-for sale investments (in thousands): 

	June 30, 2019
	Amortized Cost		Unrealized Gains		Unrealized Losses			Total Fair Value		Fair Value of Investments in Unrealized Loss Position
Money market funds	$	41,820	$	-	$	-		$	41,820	$	-
Corporate debt securities		135,520		224		(196	)		135,548		67,113
U.S. treasuries and government agency bonds		32,307		20		(16	)		32,311		15,723
Certificates of deposit		1,600		-		-			1,600		-
Auction-rate securities backed by student-loan notes		3,495		-		(280	)		3,215		3,215
Total	$	214,742	$	244	$	(492	)	$	214,494	$	86,051

	December 31, 2018
	Amortized Cost		Unrealized Gains		Unrealized Losses			Total Fair Value		Fair Value of Investments in Unrealized Loss Position
Money market funds	$	41,135	$	-	$	-		$	41,135	$	-
Corporate debt securities		172,288		7		(1,386	)		170,909		166,204
U.S. treasuries and government agency bonds		32,207		2		(141	)		32,068		28,507
Certificates of deposit		1,600		-		-			1,600		-
Auction-rate securities backed by student-loan notes		3,570		-		(329	)		3,241		3,241
Total	$	250,800	$	9	$	(1,856	)	$	248,953	$	197,952

As of  June 30, 2019 and  December 31, 2018, unrealized losses that had been in a continuous loss position for 12 months or longer were $0.5 million and $1.6 million, respectively. As of  June 30, 2019, the Company did not consider any of its available-for-sale investments to be other-than-temporarily impaired.

Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported on the Condensed Consolidated Balance Sheets to the amounts reported on the Condensed Consolidated Statements of Cash Flows: 

	June 30,		December 31,
	2019		2018
Cash and cash equivalents	$	197,012	$	172,704
Restricted cash included in other long-term assets		115		114
Total cash, cash equivalents and restricted cash reported on the Condensed Consolidated Statements of Cash Flows	$	197,127	$	172,818

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.  

11. FAIR VALUE MEASUREMENTS  

The following tables summarize the fair value measurement of the financial assets (in thousands):

	Fair Value Measurement at June 30, 2019
	Total		Level 1		Level 2		Level 3
Money market funds	$	41,820	$	41,820	$	-	$	-
Corporate debt securities		135,548		-		135,548		-
U.S. treasuries and government agency bonds		32,311		-		32,311		-
Certificates of deposit		1,600		-		1,600		-
Auction-rate securities backed by student-loan notes		3,215		-		-		3,215
Mutual funds and money market funds under deferred compensation plan		21,317		21,317		-		-
Total	$	235,811	$	63,137	$	169,459	$	3,215

18

	Fair Value Measurement at December 31, 2018
	Total		Level 1		Level 2		Level 3
Money market funds	$	41,135	$	41,135	$	-	$	-
Corporate debt securities		170,909		-		170,909		-
U.S. treasuries and government agency bonds		32,068		-		32,068		-
Certificates of deposit		1,600		-		1,600		-
Auction-rate securities backed by student-loan notes		3,241		-		-		3,241
Mutual funds and money market funds under deferred compensation plan		18,867		18,867		-		-
Total	$	267,820	$	60,002	$	204,577	$	3,241

● Level 1—includes instruments with quoted prices in active markets for identical assets.

● Level 2—includes instruments for which the valuations are based upon quoted market prices in active markets involving similar assets or inputs other than quoted prices that are observable for the assets. The market inputs used to value these instruments generally consist of market yields, recently executed transactions, broker/dealer quotes or alternative pricing sources with reasonable levels of price transparency. Pricing sources  may include industry standard data providers, security master files from large financial institutions, and other third-party sources used to determine a daily market value.

● Level 3—includes instruments for which the valuations are based on inputs that are unobservable and significant to the overall fair value measurement.

The Company’s level 3 assets consist of government-backed student loan auction-rate securities. The following table provides a rollforward of the fair value of the auction-rate securities (in thousands): 

Balance at January 1, 2019	$	3,241
Change in unrealized gain included in other comprehensive income		49
Sale and settlement at par		(75	)
Balance at June 30, 2019	$	3,215

The Company determined the fair value of the auction-rate securities using a discounted cash flow model with the following assumptions: 

	June 30,			December 31,
	2019			2018
Time-to-liquidity (in years)	2	-	3	2	-	3
Discount rate	4.1%	-	9.4%	4.9%	-	10.1%

12. DEFERRED COMPENSATION PLAN

The following table summarizes the deferred compensation plan balances on the Condensed Consolidated Balance Sheets (in thousands):

	June 30,		December 31,
	2019		2018
Deferred compensation plan asset components:
Cash surrender value of corporate-owned life insurance policies	$	14,644	$	13,103
Fair value of mutual funds and money market funds		21,317		18,867
Total	$	35,961	$	31,970
Deferred compensation plan assets reported in:
Other long-term assets	$	35,961	$	31,970
Deferred compensation plan liabilities reported in:
Accrued compensation and related benefits (short-term)	$	425	$	447
Other long-term liabilities		36,594		32,283
Total	$	37,019	$	32,730

19

13. INTEREST AND OTHER INCOME, NET

The components of interest and other income, net, are as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Interest income	$	1,661		$	1,563		$	3,357		$	3,024
Amortization of premium on available-for-sale securities		(95	)		(374	)		(216	)		(808	)
Gain on deferred compensation plan investments		620			419			2,555			233
Foreign currency exchange gain (loss)		73			614			(128	)		214
Other		(30	)		10			1			10
Total	$	2,229		$	2,232		$	5,569		$	2,673

14. INCOME TAXES

The income tax provision for interim periods is generally determined using an estimate of the Company’s annual effective tax rate and adjusted for discrete items, if any, in the relevant period. Each quarter the estimate of the annual effective tax rate is updated, and if the Company’s estimated tax rate changes, a cumulative adjustment is made.

The income tax expense for the three months ended  June 30, 2019 was $1.7 million, or 7.4% of pre-tax income. The income tax expense for the six months ended  June 30, 2019 was $0.5 million, or 1.1% of pre-tax income. The effective tax rate differed from the federal statutory rate primarily due to foreign income from the Company’s subsidiaries in Bermuda and China being taxed at lower statutory tax rates, and the benefit obtained from certain discrete items recognized in the period, including excess tax benefits from stock-based compensation. The decrease in the effective tax rate relative to the federal statutory rate was partially offset by the inclusion of the global intangible low-taxed income ("GILTI") tax.

The income tax expense for the three months ended  June 30, 2018 was $2.9 million, or 10.7% of pre-tax income. The income tax expense for the six months ended  June 30, 2018 was $3.5 million, or 7.1% of pre-tax income. The effective tax rate differed from the federal statutory rate primarily due to foreign income from the Company’s subsidiaries in Bermuda and China being taxed at lower statutory tax rates, and the benefit obtained from certain discrete items recognized in the period, including excess tax benefits from stock-based compensation. The decrease in the effective tax rate relative to the federal statutory rate was partially offset by the inclusion of the GILTI tax.

For the three and six months ended  June 30, 2019, the Company’s effective tax rate included the estimated impact of $10.1 million and $25.6 million, respectively, related to the GILTI provisions that was included as additional subpart F income, which was accounted for as a period cost. For the three and six months ended  June 30, 2018, the Company’s effective tax rate included the estimated impact of $15.5 million and $27.9 million, respectively, related to the GILTI provisions.

The Company’s 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-month period, the Company  may experience increases or decreases in its unrecognized tax benefits. However, it is not possible to determine either the magnitude or the range of increases or decreases at this time.  

In July 2015, the U.S. Tax Court issued an opinion in Altera Corp. v. Commissioner, invalidating the Treasury regulations that require participants in qualified intercompany cost-sharing arrangements to share stock-based compensation costs. A final decision was issued by the Tax Court in December 2015, and the Internal Revenue Service ("IRS") appealed the decision in June 2016. In June 2019, the U.S. Ninth Circuit Court of Appeals upheld the cost-sharing regulations.  As of June 30, 2019, it has not been determined if this ruling will be appealed. Due to the uncertainty surrounding the status of the current regulations, the Company has not recorded any adjustments as of June 30, 2019. The Company will continue to monitor and evaluate the impact of any new developments on its financial statements. 

20

15. ACCUMULATED OTHER COMPREHENSIVE LOSS

The following table summarizes the changes in accumulated other comprehensive loss (in thousands):

	Unrealized Losses on Available-for-Sale Securities			Foreign Currency Translation Adjustments			Total
Balance as of January 1, 2019	$	(1,638	)	$	(3,905	)	$	(5,543	)
Other comprehensive income before reclassifications		924			3,677			4,601
Tax effect		(98	)		-			(98	)
Other comprehensive income		826			3,677			4,503
Balance as of March 31, 2019		(812	)		(228	)		(1,040	)
Other comprehensive income (loss) before reclassifications		675			(3,709	)		(3,034	)
Tax effect		(64	)		-			(64	)
Other comprehensive income (loss)		611			(3,709	)		(3,098	)
Balance as of June 30, 2019	$	(201	)	$	(3,937	)	$	(4,138	)

16. DIVIDENDS AND DIVIDEND EQUIVALENTS

Cash Dividend Program

In  June 2014, the Board of Directors approved a dividend program pursuant to which the Company intends to pay quarterly cash dividends on its common stock. Based on the Company’s historical practice, stockholders of record as of the last business day of the quarter are entitled to receive the quarterly cash dividends when and if declared by the Board of Directors, which are payable to the stockholders in the following month. The Board of Directors declared the following cash dividends (in thousands, except per-share amounts):  

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Dividend declared per share	$	0.40	$	0.30	$	0.80	$	0.60
Total amount	$	17,261	$	12,686	$	34,441	$	25,330

As of June 30, 2019 and  December 31, 2018, accrued dividends totaled $17.3 million and $12.8 million, respectively.

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, and other factors that the Board of Directors  may deem relevant, as well as a determination that cash dividends are in the best interests of the stockholders.

The Company anticipates that cash used for future dividend payments will come from its current domestic cash, cash generated from ongoing U.S. operations, and cash 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 fulfill their requisite service requirement and the awards do not vest. As of  June 30, 2019 and December 31, 2018, accrued dividend equivalents totaled $10.2 million and $8.4 million, respectively.  

21

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, that have been made pursuant to and in reliance on the provisions of the Private Securities Litigation Reform Act of 1995. These statements include, among others, statements concerning:
 

• the above-average industry growth of product and market areas that we have targeted,

• our plan to increase our revenue through the introduction of new products within our existing product families as well as in new product categories and families,

• our belief that we may incur significant legal expenses that vary with the level of activity in each of our current or future legal proceedings,

• the effect that liquidity of our investments has on our capital resources,

• the continuing application of our products in the computing and storage, automotive, industrial, communications and consumer markets,

• estimates of our future liquidity requirements,

• the cyclical nature of the semiconductor industry,

• protection of our proprietary technology,

• business outlook for the remainder of 2019 and beyond,

• the factors that we believe will impact our business, operations and financial condition, as well as our ability to achieve revenue growth,

• the percentage of our total revenue from various end markets,

• our ability to identify, acquire and integrate the companies, businesses and products that we acquire and achieve the anticipated benefits from such acquisitions,

• the impact of the U.S. Tax Cuts and Jobs Act enacted in December 2017 (the "2017 Tax Act") on our income tax provision, financial position and cash flows,

• our plan to repatriate cash from our subsidiary in Bermuda,

• our intention and ability to pay future cash dividends and dividend equivalents, and

• the factors that differentiate us from our competitors.

In some cases, words such as “would,” “could,” “may,” “should,” “predict,” “potential,” “targets,” “continue,” “anticipate,” “expect,” “intend,” “plan,” “believe,” “seek,” “estimate,” “project,” “forecast,” “will,” the negative of these terms or other variations of such terms and similar expressions relating to the future identify forward-looking statements. All forward-looking statements are based on our current outlook, expectations, estimates, projections, beliefs and plans or objectives about our business and our industry. These statements are not guarantees of future performance and are subject to risks and uncertainties. Actual events or results could differ materially and adversely from those expressed in any such forward-looking statements. Risks and uncertainties that could cause actual results to differ materially include those set forth throughout this Quarterly Report on Form 10-Q and, in particular, in the section entitled “Item 1A. Risk Factors.” Except as required by law, we disclaim any duty to, and undertake no obligation to, update any forward-looking statements, whether as a result of new information relating to existing conditions, future events or otherwise or to release publicly the results of any future revisions we may make to forward-looking statements to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events. Readers are cautioned not to place undue reliance on such statements, which speak only as of the date of this Quarterly Report on Form 10-Q. Readers should carefully review future reports and documents that we file from time to time with the Securities and Exchange Commission, such as our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and any Current Reports on Form 8-K. 

22

Overview

We are a leading semiconductor company that designs, develops and markets high-performance power solutions. Incorporated in 1997, MPS’s core strengths include deep system-level and applications knowledge, strong analog design expertise and an innovative proprietary process technology. These combined strengths enable MPS to deliver highly integrated monolithic products that offer energy-efficient, cost-effective, easy-to-use solutions for systems found in computing and storage, automotive, industrial, communications and consumer applications. Our mission is to reduce total energy consumption in our customers' systems with green, practical and compact solutions. We believe that we differentiate ourselves by offering solutions that are more highly integrated, smaller in size, more energy-efficient, more accurate with respect to performance specifications and, consequently, more cost-effective than many competing solutions. We plan to continue to introduce new products within our existing product families, as well as in new innovative product categories.

We operate in the cyclical semiconductor industry where there is seasonal demand for certain products. We are not immune from current and future industry downturns, but we have targeted product and market areas that we believe have the ability to offer above average industry performance over the long term.

We work with third parties to manufacture and assemble our integrated circuits ("ICs"). This has enabled us to limit our capital expenditures and fixed costs, while focusing our engineering and design resources on our core strengths.

Following the introduction of a product, our sales cycle generally takes a number of quarters after we receive an initial customer order for a new product to ramp up. Typical lead time for orders is fewer than 90 days. These factors, combined with the fact that orders in the semiconductor industry can typically be cancelled or rescheduled without significant penalty to the customer, make the forecasting of our orders and revenue difficult.

We derive most of our revenue from sales through distribution arrangements and direct sales to customers in Asia, where our products are incorporated into end-user products. Our revenue from direct or indirect sales to customers in Asia was 89% for both the three months ended June 30, 2019 and 2018, and 88% for both the six months ended June 30, 2019 and 2018. We derive a majority of our revenue from the sales of our DC to DC converter products which serve the computing and storage, automotive, industrial, communications and consumer markets. We believe our ability to achieve revenue growth will depend, in part, on our ability to develop new products, enter new market segments, gain market share, manage litigation risk, diversify our customer base and continue to secure manufacturing capacity.

Critical Accounting Policies and Estimates

There have been no significant changes in our critical accounting policies and estimates used in the preparation of our financial statements during the three and six months ended June 30, 2019, as compared to those disclosed in the Annual Report on Form 10-K for the year ended December 31, 2018.

Results of Operations

The table below sets forth the data on the Condensed Consolidated Statements of Operations as a percentage of revenue:  

	Three Months Ended June 30,								Six Months Ended June 30,
	2019				2018				2019				2018
	(in thousands, except percentages)
Revenue	$	151,007	100.0	%	$	139,761	100.0	%	$	292,370	100.0	%	$	268,911	100.0	%
Cost of revenue		67,782	44.9			62,197	44.5			131,139	44.9			119,852	44.6
Gross profit		83,225	55.1			77,564	55.5			161,231	55.1			149,059	55.4
Operating expenses:
Research and development		27,545	18.2			23,481	16.8			53,003	18.1			45,091	16.8
Selling, general and administrative		35,058	23.2			28,561	20.4			65,611	22.4			55,879	20.8
Litigation expense		503	0.4			640	0.5			781	0.3			1,171	0.4
Total operating expenses		63,106	41.8			52,682	37.7			119,395	40.8			102,141	38.0
Income from operations		20,119	13.3			24,882	17.8			41,836	14.3			46,918	17.4
Interest and other income, net		2,229	1.5			2,232	1.6			5,569	1.9			2,673	1.0
Income before income taxes		22,348	14.8			27,114	19.4			47,405	16.2			49,591	18.4
Income tax expense		1,655	1.1			2,908	2.1			531	0.2			3,529	1.3
Net income	$	20,693	13.7	%	$	24,206	17.3	%	$	46,874	16.0	%	$	46,062	17.1	%

23

Revenue

The following table summarizes our revenue by end market:

	Three Months Ended June 30,													Six Months Ended June 30,
End Market	2019		% of Revenue			2018		% of Revenue			Change			2019		% of Revenue			2018		% of Revenue			Change
	(in thousands, except percentages)
Computing and storage	$	41,590		27.5	%	$	36,957		26.4	%		12.5	%	$	80,778		27.6	%	$	67,927		25.3	%		18.9	%
Automotive		21,225		14.1			20,340		14.6			4.4	%		41,742		14.3			38,072		14.2			9.6	%
Industrial		22,438		14.9			19,121		13.7			17.3	%		43,778		15.0			36,676		13.6			19.4	%
Communications		21,968		14.5			15,534		11.1			41.4	%		44,150		15.1			31,283		11.6			41.1	%
Consumer		43,786		29.0			47,809		34.2			(8.4	)%		81,922		28.0			94,953		35.3			(13.7	)%
Total	$	151,007		100.0	%	$	139,761		100.0	%		8.0	%	$	292,370		100.0	%	$	268,911		100.0	%		8.7	%

Revenue for the three months ended June 30, 2019 was $151.0 million, an increase of $11.2 million, or 8.0%, from $139.8 million for the three months ended June 30, 2018. This increase was driven by higher sales in all of our end markets except for the consumer market. Overall unit shipments increased by 16% due to higher market demand, and average sales prices decreased by approximately 5% from the same period in 2018.

For the three months ended June 30, 2019, revenue from the communications market increased $6.4 million, or 41.4%, from the same period in 2018. This increase was primarily driven by higher demand in networking applications. Revenue from the industrial market increased $3.3 million, or 17.3%, from the same period in 2018. This increase was primarily driven by higher sales in power source and security products. Revenue from the computing and storage market increased $4.6 million, or 12.5%, from the same period in 2018. This increase was primarily driven by strength in the high-performance notebook market, which was partially offset by lower demand in the solid-state drive storage market. Revenue from the automotive market increased $0.9 million, or 4.4%, from the same period in 2018. This increase was primarily driven by higher sales of products for infotainment applications. Revenue from the consumer market decreased $4.0 million, or 8.4%, from the same period in 2018. This decrease was primarily due to softness in demand for high volume consumer-related products, particularly those sold in the greater China region, as well as lower sales from gaming products. This decrease was partially offset by higher demand for mobile phone products. 

Revenue for the six months ended June 30, 2019 was $292.4 million, an increase of $23.5 million, or 8.7%, from $268.9 million for the six months ended June 30, 2018. This increase was driven by higher sales in all of our end markets except for the consumer market. Overall unit shipments increased by 15% due to higher market demand, and average sales prices decreased by approximately 3% from the same period in 2018.

For the six months ended June 30, 2019, revenue from the communications market increased $12.9 million, or 41.1%, from the same period in 2018. This increase was primarily driven by higher demand in networking applications. Revenue from the industrial market increased $7.1 million, or 19.4%, from the same period in 2018. This increase was primarily driven by higher sales in power source and security products. Revenue from the computing and storage market increased $12.9 million, or 18.9%, from the same period in 2018. This increase was primarily driven by strength in the high-performance notebook market, which was partially offset by lower demand in the solid-state drive storage market. Revenue from the automotive market increased $3.7 million, or 9.6%, from the same period in 2018. This increase was primarily driven by higher sales of products for infotainment applications. Revenue from the consumer market decreased $13.0 million, or 13.7%, from the same period in 2018. This decrease was primarily due to softness in demand for high volume consumer-related products, particularly those sold in the greater China region, as well as lower sales from chargers and gaming products. This decrease was partially offset by higher demand for mobile phone products. 

Cost of Revenue and Gross Margin

 
Cost of revenue primarily consists of costs incurred to manufacture, assemble and test our products, as well as warranty costs, inventory-related and other overhead costs, and stock-based compensation expenses.

	Three Months Ended June 30,									Six Months Ended June 30,
	2019			2018			Change			2019			2018			Change
	(in thousands, except percentages)
Cost of revenue	$	67,782		$	62,197			9.0	%	$	131,139		$	119,852			9.4	%
As a percentage of revenue		44.9	%		44.5	%					44.9	%		44.6	%
Gross profit	$	83,225		$	77,564			7.3	%	$	161,231		$	149,059			8.2	%
Gross margin		55.1	%		55.5	%					55.1	%		55.4	%

Cost of revenue was $67.8 million, or 44.9% of revenue, for the three months ended June 30, 2019, and $62.2 million, or 44.5% of revenue, for the three months ended June 30, 2018. The $5.6 million increase in cost of revenue was primarily due to a 16% increase in overall unit shipments and a 2% increase in the average direct cost of units shipped. The increase in cost of revenue was partially offset by a decrease in inventory write-downs.

24

Gross margin was 55.1% for the three months ended June 30, 2019, compared with 55.5% for the three months ended June 30, 2018. The decrease in gross margin was primarily due to increased sales of lower margin products, which was partially offset by lower inventory write-downs as a percentage of revenue.

Cost of revenue was $131.1 million, or 44.9% of revenue, for the six months ended June 30, 2019, and $119.9 million, or 44.6% of revenue, for the six months ended June 30, 2018. The $11.2 million increase in cost of revenue was primarily due to a 15% increase in overall unit shipments and a 4% increase in the average direct cost of units shipped. The increase in cost of revenue was partially offset by a decrease in inventory write-downs and warranty expense.

Gross margin was 55.1% for the six months ended June 30, 2019, compared with 55.4% for the six months ended June 30, 2018. The decrease in gross margin was primarily due to increased sales of lower margin products, which was partially offset by lower inventory write-downs and warranty expenses as a percentage of revenue.

Research and Development

Research and development (“R&D”) expenses primarily consist of salary and benefit expenses, bonuses, stock-based compensation and deferred compensation for design and product engineers, expenses related to new product development and supplies, and facility costs.    

	Three Months Ended June 30,									Six Months Ended June 30,
	2019			2018			Change			2019			2018			Change
	(in thousands, except percentages)
R&D expenses	$	27,545		$	23,481			17.3	%	$	53,003		$	45,091			17.5	%
As a percentage of revenue		18.2	%		16.8	%					18.1	%		16.8	%

R&D expenses were $27.5 million, or 18.2% of revenue, for the three months ended June 30, 2019, and $23.5 million, or 16.8% of revenue, for the three months ended June 30, 2018. The $4.0 million increase in R&D expenses was primarily due to an increase of $2.4 million in compensation expenses, which include salary, benefits and bonuses, and an increase of $1.2 million in stock-based compensation expenses, which were mainly associated with performance-based equity awards. Our R&D headcount was 746 employees as of June 30, 2019, compared with 655 employees as of June 30, 2018. 

R&D expenses were $53.0 million, or 18.1% of revenue, for the six months ended June 30, 2019, and $45.1 million, or 16.8% of revenue, for the six months ended June 30, 2018. The $7.9 million increase in R&D expenses was primarily due to an increase of $3.0 million in compensation expenses, which include salary, benefits and bonuses, an increase of $1.7 million in new product development expenses, an increase of $1.7 million in stock-based compensation expenses, which were mainly associated with performance-based equity awards, and an increase of $0.9 million in expenses related to changes in the value of the deferred compensation plan liabilities. 

Selling, General and Administrative

Selling, general and administrative (“SG&A”) expenses primarily include salary and benefit expenses, bonuses, stock-based compensation and deferred compensation for sales, marketing and administrative personnel, sales commissions, travel expenses, facilities costs, and professional service fees.

	Three Months Ended June 30,									Six Months Ended June 30,
	2019			2018			Change			2019			2018			Change
	(in thousands, except percentages)
SG&A expenses	$	35,058		$	28,561			22.7	%	$	65,611		$	55,879			17.4	%
As a percentage of revenue		23.2	%		20.4	%					22.4	%		20.8	%

SG&A expenses were $35.1 million, or 23.2% of revenue, for the three months ended June 30, 2019, and $28.6 million, or 20.4% of revenue, for the three months ended June 30, 2018. The $6.5 million increase in SG&A expenses was primarily due to an increase of $5.4 million in stock-based compensation expenses, which were mainly associated with performance-based equity awards, and an increase of $1.1 million in compensation expenses, which include salary, benefits and bonuses. Our SG&A headcount was 458 employees as of June 30, 2019, compared with 403 employees as of June 30, 2018.  

SG&A expenses were $65.6 million, or 22.4% of revenue, for the six months ended June 30, 2019, and $55.9 million, or 20.8% of revenue, for the six months ended June 30, 2018. The $9.7 million increase in SG&A expenses was primarily due to an increase of $5.9 million in stock-based compensation expenses, which were mainly associated with performance-based equity awards, an increase of $1.6 million in compensation expenses, which include salary, benefits and bonuses, an increase of $1.4 million in expenses related to changes in the value of the deferred compensation plan liabilities, and an increase of $0.5 million in professional service fees.

25

Litigation Expense

Litigation expense was $0.5 million for the three months ended June 30, 2019, compared with $0.6 million for the three months ended June 30, 2018. The decrease was primarily due to lower expenses incurred on an ongoing lawsuit in which we are the plaintiff.

Litigation expense was $0.8 million for the six months ended June 30, 2019, compared with $1.2 million for the six months ended June 30, 2018. The decrease was primarily due to lower expenses incurred on an ongoing lawsuit in which we are the plaintiff.

Interest and Other Income, Net

Interest and other income, net, was $2.2 million for the three months ended June 30, 2019, compared with $2.2 million for the three months ended June 30, 2018. For the three months ended June 30, 2019, amortization of premium on available-for-sale investments decreased $0.3 million and income related to changes in the value of the deferred compensation plan investments increased $0.2 million, compared to the three months ended June 30, 2018. These favorable changes were offset by a decrease of $0.5 million in foreign currency exchange gains.

Interest and other income, net, was $5.6 million for the six months ended June 30, 2019, compared with $2.7 million for the six months ended June 30, 2018. The increase was primarily due to an increase of $2.3 million in income related to changes in the value of the deferred compensation plan investments, a decrease of $0.6 million in amortization of premium on available-for-sale investments, and an increase of $0.3 million in interest income as a result of higher investment balances and yields. These favorable changes were partially offset by an increase of $0.3 million in foreign currency exchange losses.

Income Tax Expense 

The income tax provision for interim periods is generally determined using an estimate of our annual effective tax rate and adjusted for discrete items, if any, in the relevant period. Each quarter the estimate of the annual effective tax rate is updated, and if our estimated tax rate changes, a cumulative adjustment is made.

The income tax expense for the three months ended June 30, 2019 was $1.7 million, or 7.4% of pre-tax income. The income tax expense for the six months ended June 30, 2019 was $0.5 million, or 1.1% of pre-tax income. The effective tax rate differed from the federal statutory rate primarily due to foreign income from our subsidiaries in Bermuda and China being taxed at lower statutory tax rates, and the benefit obtained from certain discrete items recognized in the period, including excess tax benefits from stock-based compensation. The decrease in the effective tax rate relative to the federal statutory rate was partially offset by the inclusion of the global intangible low-taxed income ("GILTI") tax.

The income tax expense for the three months ended June 30, 2018 was $2.9 million, or 10.7% of pre-tax income. The income tax expense for the six months ended June 30, 2018 was $3.5 million, or 7.1% of pre-tax income. The effective tax rate differed from the federal statutory rate primarily due to foreign income from our subsidiaries in Bermuda and China being taxed at lower statutory tax rates, and the benefit obtained from certain discrete items recognized in the period, including excess tax benefits from stock-based compensation. The decrease in the effective tax rate relative to the federal statutory rate was partially offset by the inclusion of the GILTI tax.

For the three and six months ended June 30, 2019, our effective tax rate included the estimated impact of $10.1 million and $25.6 million, respectively, related to the GILTI provisions that was included as additional subpart F income, which was accounted for as a period cost. For the three and six months ended June 30, 2018, our effective tax rate included the estimated impact of $15.5 million and $27.9 million, respectively, related to the GILTI provisions.

26

Liquidity and Capital Resources

	June 30,			December 31,
	2019			2018
	(in thousands, except percentages)
Cash and cash equivalents	$	197,012		$	172,704
Short-term investments		169,459			204,577
Total cash, cash equivalents and short-term investments	$	366,471		$	377,281
Percentage of total assets		42.2	%		47.6	%
Total current assets	$	585,136		$	580,810
Total current liabilities		(88,120	)		(80,439	)
Working capital	$	497,016		$	500,371

As of June 30, 2019, we had cash and cash equivalents of $197.0 million and short-term investments of $169.5 million, compared with cash and cash equivalents of $172.7 million and short-term investments of $204.6 million as of December 31, 2018. As of June 30, 2019, $131.1 million of cash and cash equivalents and $81.4 million of short-term investments were held by our international subsidiaries. For the six months ended June 30, 2019, we repatriated $75 million of cash from our Bermuda subsidiary to the U.S. The proceeds were primarily used to fund real estate purchases and cash dividend payments. We may repatriate additional cash from our Bermuda subsidiary to fund our expenditures in future periods. Earnings from other foreign subsidiaries will continue to be indefinitely reinvested.

The significant components of our working capital are cash and cash equivalents, short-term investments, accounts receivable, inventories and other current assets, reduced by accounts payable, accrued compensation and related benefits, and other accrued liabilities. As of June 30, 2019, we had working capital of $497.0 million, compared with working capital of $500.4 million as of December 31, 2018. The $3.4 million decrease in working capital was due to a $7.7 million increase in current liabilities, which was partially offset by a $4.3 million increase in current assets. The increase in current liabilities was primarily due to an increase in accounts payable and accrued compensation and related benefits. The increase in current assets was primarily due to an increase in cash and cash equivalents, inventories and other current assets, which was partially offset by a decrease in short-term investments. 

Summary of Cash Flows

The following table summarizes our cash flow activities:

	Six Months Ended June 30,
	2019			2018
	(in thousands)
Net cash provided by operating activities	$	82,893		$	41,710
Net cash used in investing activities		(42,070	)		(29,852	)
Net cash used in financing activities		(16,689	)		(11,137	)
Effect of change in exchange rates		175			(407	)
Net increase in cash, cash equivalents and restricted cash	$	24,309		$	314

For the six months ended June 30, 2019, net cash provided by operating activities was $82.9 million, primarily due to our net income adjusted for certain non-cash items, including depreciation and amortization and stock-based compensation, and a net decrease of $7.3 million from the changes in our operating assets and liabilities. The increase in inventories was primarily driven by an increase in finished goods to meet current demand and future growth.  The decrease in income tax liabilities was primarily due to income tax payments made, including the deemed repatriation transition tax, for the year. For the six month ended June 30, 2018, net cash provided by operating activities was $41.7 million, primarily due to our net income adjusted for certain non-cash items, including depreciation and amortization and stock-based compensation, and a net decrease of $41.7 million from the changes in our operating assets and liabilities. The increase in accounts receivable was primarily driven by increased sales and the timing of shipments in the last month of the quarter. The increase in inventories was primarily driven by an increase in strategic wafer and die inventories as well as an increase in finished goods to meet current demand and future growth. The increase in accounts payable was primarily driven by increased inventory and capital asset purchases to meet future demand.

For the six months ended June 30, 2019, net cash used in investing activities was $42.1 million, primarily due to purchases of property and equipment of $77.6 million, which included the purchase of a building and land in Kirkland, Washington for $52.3 million and net contributions to the deferred compensation plan of $1.4 million, which was partially offset by net proceeds from maturities and sales of investments of $36.5 million. For the six months ended June 30, 2018, net cash used in investing activities was $29.9 million, primarily due to purchases of property and equipment of $13.0 million, net purchases of short-term investments of $15.9 million, and net contributions to the deferred compensation plan of $0.9 million.

27

For the six months ended June 30, 2019, net cash used in financing activities was $16.7 million, primarily reflecting $30.8 million used to pay dividends to our stockholders and dividend equivalents to our employees who hold RSUs, which was partially offset by $14.1 million of cash proceeds from vesting of RSUs and issuance of shares through our employee stock purchase plan. For the six months ended June 30, 2018, net cash used in financing activities was $11.1 million, primarily reflecting $21.5 million used to pay dividends to our stockholders and dividend equivalents to our employees who hold RSUs, partially offset by $10.3 million of cash proceeds from vesting of RSUs and issuance of shares through our employee stock purchase plan. 

We anticipate that cash used for future dividends and dividend equivalent payments, as well as payments for the one-time deemed repatriation transition tax and other expenditures, will come from our current domestic cash, cash generated from ongoing U.S. operations, and cash repatriated from our Bermuda subsidiary. Earnings from other foreign subsidiaries will continue to be indefinitely reinvested.

Although cash requirements will fluctuate based on the timing and extent of many factors such as those discussed above, we believe that cash generated from operations, together with the liquidity provided by existing cash balances and short-term investments, will be sufficient to satisfy our liquidity requirements for the next 12 months. 

In the future, in order to strengthen our financial position, respond to changes in our circumstance or unforeseen events or conditions, or fund our growth, we may need to discontinue paying dividends and dividend equivalents, and may need to raise additional funds by any one or a combination of the following: issuing equity securities, issuing debt or convertible debt securities, incurring indebtedness secured by our assets, or selling certain product lines and/or portions of our business. Accordingly, we cannot ensure that we will continue to pay dividends and dividend equivalents in the future, and there can be no guarantee that we will be able to raise additional funds on terms acceptable to us, or at all.

From time to time, we have engaged in discussions with third parties concerning potential acquisitions of product lines, technologies, businesses and companies, and we continue to consider potential acquisition candidates. Any such transactions could involve the issuance of a significant number of new equity securities, assumptions of debt, and/or payment of cash consideration. We may also be required to raise additional funds to complete any such acquisitions, through either the issuance of equity and debt securities or incurring indebtedness secured by our assets. If we raise additional funds or acquire businesses or technologies through the issuance of equity securities or convertible debt securities, our existing stockholders may experience significant dilution. 

Contractual Obligations

Our outstanding purchase commitments primarily consist of wafer purchases, assembly and other manufacturing services, construction services and license arrangements. As of June 30, 2019, the outstanding balance under our purchase commitments was $71.4 million, compared with $61.4 million as of December 31, 2018.

Under the 2017 Tax Act, we have a transition tax liability which represents a one-time, mandatory deemed repatriation tax imposed on previously deferred foreign earnings. As permitted by the 2017 Tax Act, we elected to pay the tax liability in installments on an interest-free basis through 2025. As of June 30, 2019, the outstanding liability was $20.7 million, compared with $22.1 million as of December 31, 2018.

Our long-term obligations include long-term liabilities reflected on our Condensed Consolidated Balance Sheets, which primarily consist of the deferred compensation plan liabilities and accrued dividend equivalents. As of June 30, 2019, the outstanding obligations were $43.4 million, compared with $38.5 million as of December 31, 2018.

Our other contractual obligations have not changed significantly from those disclosed in our Annual Report on Form 10-K for the year ended December 31, 2018.

Off-Balance Sheet Arrangements

As of June 30, 2019, we had no off-balance sheet arrangements as defined in Item 303(a)(4) of the Securities and Exchange Commission’s Regulation S-K.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

For a discussion of market risks, refer to Item 7A, “Quantitative and Qualitative Disclosures about Market Risk” in our Annual Report on Form 10-K for the year ended December 31, 2018. During the three and six months ended June 30, 2019, there were no material changes or developments that would materially alter the market risk assessment performed as of December 31, 2018.

28

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures pursuant to Rule 13a-15(e) and Rule 15d-15(e) under the Securities Exchange Act of 1934 as of the end of the period covered by this Quarterly Report on Form 10-Q. 

Based on this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that, as of June 30, 2019, our disclosure controls and procedures are designed at a reasonable assurance level and are effective to provide reasonable assurance that information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

Effective January 1, 2019, we adopted ASU No. 2016-02, Leases (Topic 842). We have implemented additional business processes and control activities, primarily related to the analysis of lease contracts, recognition of the right-of-use assets and lease liabilities, and presentation and disclosure, in order to monitor and maintain appropriate controls over financial reporting. There were no other changes in our internal control over financial reporting that occurred during the quarter ended June 30, 2019, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Limitations on Effectiveness of Controls and Procedures

In designing and evaluating the disclosure controls and procedures, management recognizes that any set of controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. In addition, the design of disclosure controls and procedures must reflect the fact that there are resource constraints and that management is required to apply its judgment in evaluating the benefits of possible controls and procedures relative to their costs.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

We are a party to actions and proceedings in the ordinary course of business, including potential litigation initiated by our stockholders, challenges to the enforceability or validity of our intellectual property, claims that our products infringe on the intellectual property rights of others, and employment matters. These proceedings often involve complex questions of fact and law and may require the expenditure of significant funds and the diversion of other resources to prosecute and defend. We defend ourselves vigorously against any such claims. As of June 30, 2019, there were no material pending legal proceedings to which we were a party.

ITEM 1A. RISK FACTORS

Our business involves numerous risks and uncertainties. You should carefully consider the risks described below, together with all of the other information in this Quarterly Report on Form 10-Q and other filings with the Securities and Exchange Commission in evaluating our business. If any of the following risks actually occur, our business, financial condition, operating results, and growth prospects would   likely be materially and adversely affected. In such an event, the trading price of our common stock could decline, and you could lose all or part of your investment in our common stock. Our past financial performance should not be considered to be a reliable indicator of future performance, and investors should not use historical trends to anticipate results or trends in future periods. These risks involve forward-looking statements and our actual results may differ substantially from those discussed in these forward-looking statements.

The future trading price of our common stock could be subject to wide fluctuations in response to a variety of factors.

The future trading price of our common stock is likely to be highly volatile and could be subject to wide fluctuations in response to various factors, many of which are beyond our control, including:

• actual or anticipated results of operations and financial performance;

29

• general economic, industry and market conditions worldwide;

• our ability to outperform the market, and outperform at a level that meets or exceeds our investors’ expectations;

• whether our guidance meets the expectations of our investors;

• the breath and liquidity of the market for our common stock;

• developments generally affecting the semiconductor industry;

• commencement of or developments relating to our involvement in litigation;

• investor perceptions of us and our business strategies;

• changes in securities analysts’ expectations or our failure to meet those expectations;

• actions by institutional or other large stockholders;

• terrorist acts or acts of war;

• actual or anticipated manufacturing capacity limitations;

• developments with respect to intellectual property rights;

• introduction of new products by us or our competitors;

• our sale of common stock or other securities in the future;

• conditions and trends in technology industries;

• our loss of key customers;

• changes in market valuation or earnings of our competitors;

• any mergers, acquisitions or divestitures of assets undertaken by us;

• government debt default;

• government policies and regulations on corporate taxes, including the impact of the 2017 Tax Act;

• government policies and regulations on international trade policies and restrictions, including tariffs on imports of foreign goods;

• export controls and trade and economic sanctions and regulations and other regulatory or contractual limitations on our ability to sell or develop our products in certain foreign markets, particularly in China;

• our ability to obtain governmental licenses and approvals for international trading activities or technology transfers, including export licenses;

• our ability to develop new products, enter new market segments, gain market share, manage litigation risk, diversify our customer base and successfully secure manufacturing capacity;

• our ability to increase our gross margins;

• market reactions to guidance from other semiconductor companies or third-party research groups;

• market reactions to merger and acquisition activities in the semiconductor industry, and rumors or expectations of further consolidation in the industry;

• investments in sales and marketing resources to enter new markets;

• costs of increasing wafer capacity and qualifying additional third-party wafer fabrication facilities;

• our ability to pay quarterly cash dividends to stockholders; and

• changes in the estimation of the future size and growth rate of our markets.

30

In addition, the stock market often experiences substantial volatility that may be unrelated to the operating performance of particular companies. These broad market fluctuations may adversely affect the trading price of our common stock.

We expect our operating results to fluctuate from quarter to quarter and year over year, which may make it difficult to predict our future performance and could cause our stock price to decline and be volatile.

Our revenue, expenses, and results of operations are difficult to predict, have varied significantly in the past and will continue to fluctuate significantly in the future due to a number of factors, many of which are beyond our control. We expect fluctuations to continue for a number of reasons, including:

• changes in general demand for electronic products as a result of worldwide macroeconomic conditions;

• changes in business conditions at our distributors, value-added resellers and/or end-customers;

• changes in general economic conditions in the countries where our products are sold or used;

• adverse changes in laws and government regulations, such as tariffs on imports of foreign goods, export regulations and export classifications, including in foreign countries where we have offices or operations;

• the timing of developments and related expenses in our litigation matters;

• the loss of key customers or our inability to attract new customers due to customer and prospective customer concerns about being litigation targets;

• continued dependence on turns business (orders received and shipped within the same fiscal quarter);

• continued dependence on the Asian markets for our customer base;

• increases in assembly costs due to commodity price increases, such as the price of gold;

• the timing of new product introductions by us and our competitors;

• changes in our revenue mix between original equipment manufacturers ("OEMs"), original design manufacturers ("ODMs"), distributors and value-added resellers;

• changes in product mix, product returns, and actual and potential product liability;

• the acceptance of our new products in the marketplace;

• our ability to develop new process technologies and achieve volume production;

• our ability to meet customer product demand in a timely manner;

• the scheduling, rescheduling, or cancellation of orders by our customers;

• the cyclical nature of demand for our customers’ products;

• fluctuations in our estimate for stock rotation reserves;

• our ability to manage our inventory levels, including the levels of inventory held by our distributors;

• product obsolescence;

• seasonality and variability in the computing and storage, automotive, industrial, communications and consumer markets;

• the availability of adequate manufacturing capacity from our outside suppliers;

• increases in prices for finished wafers due to general capacity shortages;

• the potential loss of future business resulting from capacity issues;

• changes in manufacturing yields;

• movements in foreign exchange rates, interest rates or tax rates;

• the impact of the 2017 Tax Act on our income tax provision and cash flows;

• the impact of tariffs on imports of foreign goods; and

• stock-based compensation charges primarily resulting from performance and market-based equity awards granted to our employees.

31

Due to the factors noted above and other risks described in this section, many of which are beyond our control, you should not rely on quarter-to-quarter or year-over-year comparisons to predict our future financial performance. Unfavorable changes in any of the above factors may seriously harm our business and results of operations, and may cause our stock price to decline and be volatile.

Our business has been and may be significantly impacted by worldwide economic conditions, in particular changing economic conditions in China.

In recent years, global credit and financial markets experienced disruptions, and may experience disruptions in the future, including diminished liquidity and credit availability, declines in consumer confidence, declines in economic growth, increases in unemployment rates, and uncertainty about economic stability. Economic uncertainty affects businesses such as ours in a number of ways, making it difficult to accurately forecast and plan our future business activities. The tightening of credit in financial markets may lead consumers and businesses to postpone spending, which may cause our customers to cancel, decrease or delay their existing and future orders with us. In addition, financial difficulties experienced by our suppliers or distributors could result in product delays, increased accounts receivable defaults and inventory challenges. Volatility in the credit markets could severely diminish liquidity and capital availability.

Demand for our products is a function of the health of the economies in the United States, Europe, China and the rest of Asia. We cannot predict the timing, strength or duration of any economic disruption or subsequent economic recovery worldwide, in the United States, in our industry, or in the different markets that we serve. These and other economic factors have had, and may in the future have, a material adverse effect on demand for our products and on our financial condition and operating results.

In particular, since we have significant operations in China, our business development plans, results of operations and financial condition may be materially adversely affected by significant political, social and economic developments in China. A slowdown in economic growth in China could adversely impact our customers, prospective customers, suppliers, distributors and partners in China, which could have a material adverse effect on our results of the operations and financial condition. There is no guarantee that economic downturns, whether actual or perceived, any further decrease in economic growth rates or an otherwise uncertain economic outlook in China will not occur or persist in the future, that they will not be protracted or that governments will respond adequately to control and reverse such conditions, any of which could materially and adversely affect our business, financial condition and results of operations.

Recent changes in international trade policy and rising concern of international tariffs, including tariffs applied to goods traded between the United States and China, could materially and adversely affect our business and results of operations.

Since the beginning of 2018, there has been increasing rhetoric, in some cases coupled with legislative or executive action, from several U.S. and foreign leaders regarding tariffs against foreign imports of certain materials. More specifically, there have been several rounds of U.S. tariffs on Chinese goods taking effect in 2018 and 2019, some of which prompted retaliatory Chinese tariffs on U.S. goods. The institution of trade tariffs both globally and between the U.S. and China specifically carries the risk of negatively affecting China’s overall economic condition, which could have a negative impact on us as we have significant operations in China. Furthermore, imposition of tariffs could cause a decrease in the sales of our products to customers located in China or other customers selling to Chinese end users, which would directly impact our business and operating results.

We are subject to export restrictions and laws affecting trade and investments that could materially and adversely affect our business and results of operations.

As a global company headquartered in the U.S., we are subject to U.S. laws and regulations that could limit and restrict the export of some of our products and services and may restrict our transactions with certain customers, business partners and other persons, including, in certain cases, dealings with or between our employees and subsidiaries. In certain circumstances, export control and economic sanctions regulations may prohibit the export of certain products, services and technologies, and in other circumstances we may be required to obtain an export license before exporting the controlled item. Compliance with these laws and regulations has not materially limited our operations or our sales, but could materially limit them in the future which would materially and adversely affect our business and results of operations. We maintain an export compliance program but there are risks that the compliance controls could be circumvented, exposing us to legal liabilities. We must also comply with export restrictions and laws imposed by other countries affecting trade and investments. Although these restrictions and laws have not materially restricted our operations in the recent past, there is a significant risk that they could do so in the future, which would materially and adversely affect our business and results of operations. In addition, U.S. laws and regulations and sanctions or threat of sanctions that could limit and restrict the export of some of our products and services to our customers may also encourage our customers to develop their own solutions to replace our products or seek to obtain a greater supply of similar or substitute products from our competitors that are not subject to these restrictions, which could materially and adversely affect our results of operations.

Moreover, U.S. government’s actions targeting exports of certain technologies to China are becoming more pervasive. For example, in May 2019, President Trump issued an executive order that invoked national emergency economic powers to implement a framework to regulate the acquisition or transfer of information communications technology in transactions that imposed undue national security risks. These actions could lead to additional restrictions on the export of products that include or enable certain technologies, including products we provide to China-based customers.

The highly cyclical nature of the semiconductor industry, which has produced significant and sometimes prolonged downturns, could materially adversely affect our operating results, financial condition and cash flows.

Historically, the semiconductor industry has been highly cyclical and, at various times, has experienced significant downturns and wide fluctuations in supply and demand. The semiconductor industry is currently experiencing such a downturn. These conditions have caused significant variances in product demand and production capacity, as well as rapid erosion of average selling prices. The industry may experience severe or prolonged downturns in the future, which could result in downward pressure on the price of our products as well as lower demand for our products. Because significant portions of our expenses are fixed in the short term or incurred in advance of anticipated sales, we may not be able to decrease our expenses in a timely manner to offset any sales shortfall. Any significant or prolonged downturns could have a material adverse effect on our operating results, financial condition and cash flows.

32

We may not be profitable on a quarterly or annual basis.

Our profitability is dependent on many factors, including:

• our sales, which because of our turns business, are difficult to accurately forecast;

• the cancellation or rescheduling of our customers’ orders, which may occur without significant penalty to our customers;

• changes in general demand for electronic products as a result of worldwide macroeconomic conditions;

• changes in revenue mix between OEMs, ODMs, distributors and value-added resellers;

• changes in product mix, and actual and potential product liability;

• changes in revenue mix between end market segments (i.e. computing and storage, automotive, industrial, communications and consumer);

• our competition, which could adversely impact our selling prices and our potential sales;

• our manufacturing costs, including our ability to negotiate with our vendors and our ability to efficiently run our test facility in China;

• manufacturing capacity constraints;

• level of activity in our legal proceedings, which could result in significant legal expenses;

• the impact of the 2017 Tax Act on our income tax provision, financial condition and cash flows;

• the impact of laws and government regulations, such as tariffs on imports of foreign goods or regulations restricting the export of goods and services between the U.S. and China;

• stock-based compensation charges primarily resulting from performance and market-based equity awards granted to our employees; and

• our operating expenses, including general and administrative expenses, selling and marketing expenses, and research and development expenses relating to products that will not be introduced and will not generate revenue until later periods, if at all.

We may not achieve profitability on a quarterly or annual basis in the future. Unfavorable changes in our operations, including any of the factors noted above, may have a material adverse effect on our quarterly or annual profitability.

We may not experience growth rates comparable to past years.

In the past, our revenue increased significantly in certain years due to increased sales of certain of our products. We are subject to numerous risks and factors that could cause a decrease in our growth rates compared to past periods, including increased competition, loss of certain of our customers, unfavorable changes in our operations, reduced global electronics demand, a deterioration in market conditions, end-customer market downturn, market acceptance and penetration of our current and future products and litigation. A material decrease in our growth rates could adversely affect our stock price and results of operations.  

We may be unsuccessful in developing and selling new products with margins similar to or better than what we have experienced in the past, which would impact our overall gross margin and financial performance.

Our success depends on products that are differentiated in the market, which result in gross margins that have historically been above industry averages. Should we fail to improve our gross margin in the future, and accordingly develop and introduce sufficiently differentiated products that result in higher gross margins than industry averages, our financial condition and results of operations could be materially and adversely affected.    

33

Industry consolidation may lead to increased competition and may harm our operating results.

In recent years, there has been a trend toward semiconductor industry consolidation. We expect this trend to continue as companies attempt to improve the leverage of growing research and development costs, strengthen or hold their market positions in an evolving industry, or become unable to continue operations unless they find an acquirer or consolidate with another company. In addition, companies that are strategic alliance partners in some areas of our business may acquire or form alliances with our competitors, thereby reducing their business with us. We believe that semiconductor industry consolidation may result in stronger competitors that are better able to compete as sole-source vendors for customers. This could lead to more variability in our operating results and could have a material adverse effect on our business, operating results and financial condition.

If demand for our products declines in the major end markets that we serve, our revenue will decrease and our results of operations and financial condition would be materially and adversely affected.

We believe that the application of our products in the computing and storage, automotive, industrial, communications and consumer markets will continue to account for the majority of our revenue. If the demand for our products declines in the major end markets that we serve, our revenue will decrease and our results of operations and financial condition would be materially and adversely affected. In addition, as technology evolves, the ability to integrate the functionalities of various components, including our discrete semiconductor products, onto a single chip and/or onto other components of systems containing our products increases. Should our customers require integrated solutions that we do not offer, demand for our products could decrease, and our business and results of operations would be materially and adversely affected.

We may be unsuccessful in developing and selling new products or in penetrating new markets required to maintain or expand our business.

Our competitiveness and future success depend on our ability to design, develop, manufacture, assemble, test, market, and support new products and enhancements on a timely and cost-effective basis. A fundamental shift in technologies in any of our product markets could have a material adverse effect on our competitive position within these markets. Our failure to timely develop new technologies or to react quickly to changes in existing technologies could materially delay our development of new products, which could result in product obsolescence, decreased revenue, and/or a loss of market share to competitors.

As we develop new product lines, we must adapt to market conditions that are unfamiliar to us, such as competitors and distribution channels that are different from those we have known in the past. Some of our new product lines require us to re-equip our labs to test parameters we have not tested in the past. If we are unable to adapt rapidly to these new and additional conditions, we may not be able to successfully penetrate new markets.

The success of a new product depends on accurate forecasts of long-term market demand and future technological developments, as well as on a variety of specific implementation factors, including:

• timely and efficient completion of process design and device structure improvements;

• timely and efficient implementation of manufacturing, assembly, and test processes;

• the ability to secure and effectively utilize fabrication capacity in different geometries;

• product performance;

• product availability;

• product quality and reliability; and

• effective marketing, sales and service.

To the extent that we fail to timely introduce new products or to quickly penetrate new markets, our revenue and financial condition could be materially adversely affected.

We may face competition from customers developing products internally.

Our customers generally have substantial technological capabilities and financial resources. Some customers have traditionally used these resources to develop their own products internally. The future prospects for our products in these markets are dependent in part upon our customers' acceptance of our products as an alternative to their internally developed products. Future sales prospects also are dependent upon acceptance of third-party sourcing for products as an alternative to in-house development. Customers may in the future continue to use internally developed components. They also may decide to develop or acquire components, technologies or products that are similar to, or that may be substituted for, our products. If our customers fail to accept our products as an alternative, if they develop or acquire the technology to develop such components internally rather than purchase our products, or if we are otherwise unable to develop or maintain strong relationships with them, our business, financial condition and results of operations could be materially and adversely affected.

34

We derive most of our revenue from direct or indirect sales to customers in Asia and have significant operations in Asia, which may expose us to political, cultural, regulatory, economic, foreign exchange, and operational risks.

We derive most of our revenue from customers located in Asia through direct sales or indirect sales through distribution arrangements and value-added reseller agreements with parties located in Asia. As a result, we are subject to increased risks due to this geographic concentration of business and operations. For the three and six months ended June 30, 2019, 89% and 88% of our revenue, respectively, was from customers in Asia. There are risks inherent in doing business in Asia, and internationally in general, including:

• changes in, or impositions of, legislative or regulatory requirements, including tax laws in the U.S. and in the countries in which we manufacture or sell our products, and government action to restrict our ability to sell to foreign customers where sales of products may require export license;

• trade restrictions, including restrictions imposed by the United States on trading with parties in foreign countries;

• currency exchange rate fluctuations impacting intra-company transactions;

• the fluctuations in the value of the U.S. Dollar relative to other foreign currencies, which could affect the competitiveness of our products;

• transportation delays;

• changes in tax regulations in China that may impact our tax status in Chengdu, Hangzhou and other regions where we have significant operations;

• tariffs imposed by China and the United States that may impact our sales;

• export controls, trade and economic sanctions and regulations, and other regulatory or contractual limitations on our ability to sell or develop our products in China;

• multi-tiered distribution channels that lack visibility to end customer pricing and purchase patterns;

• international political relationships and threats of war;

• terrorism and threats of terrorism;

• epidemics and illnesses;

• work stoppages and infrastructure problems due to adverse weather conditions or natural disasters;

• work stoppages related to employee dissatisfaction;

• economic, social and political instability;

• longer accounts receivable collection cycles and difficulties in collecting accounts receivables;

• enforcing contracts generally; and

• less effective protection of intellectual property and contractual arrangements.

If we fail to expand our customer base and significantly reduce the geographic concentration of our customers, we will continue to be subject to the foregoing risks, which could materially and adversely affect our revenue and financial condition.

We depend on a limited number of customers, including distributors, for a significant percentage of our revenue.

Historically, we have generated most of our revenue from a limited number of customers, including distributors. For example, sales to our largest distributor accounted for 22% of our total revenue for both the three and six months ended June 30, 2019. We continue to rely on a limited number of customers for a significant portion of our revenue. Because we rely on a limited number of customers for significant percentages of our revenue, a decrease in demand or significant pricing pressure for our products from any of our major customers for any reason (including due to competition, market conditions, catastrophic events or otherwise) could have a materially adverse impact on our financial conditions and results of operations.

35

We are subject to anti-corruption laws in the jurisdictions in which we operate, including the U.S. Foreign Corrupt Practices Act, or the FCPA. Our failure to comply with these laws could result in penalties which could harm our reputation and have a material adverse effect on our business, results of operations and financial condition.

We are subject to the FCPA, which generally prohibits companies and their intermediaries from making improper payments to foreign officials for the purpose of obtaining or keeping business and/or other benefits, along with various other anti-corruption laws. Although we have implemented policies and procedures designed to ensure that we, our employees and other intermediaries comply with the FCPA and other anti-corruption laws to which we are subject, there is no assurance that such policies or procedures will work effectively all of the time or protect us against liability under the FCPA or other laws for actions taken by our employees and other intermediaries with respect to our business or any businesses that we may acquire. We have significant operations in Asia, which place us in frequent contact with persons who may be considered “foreign officials” under the FCPA, resulting in an elevated risk of potential FCPA violations. If we are not in compliance with the FCPA and other laws governing the conduct of business with government entities (including local laws), we may be subject to criminal and civil penalties and other remedial measures, which could have a material adverse impact on our business, financial condition, results of operations and liquidity. Any investigation of any potential violations of the FCPA or other anti-corruption laws by the U.S. or foreign authorities could harm our reputation and have an adverse impact on our business, financial condition and results of operations.

We receive a significant portion of our revenue from distribution arrangements, value-added resellers and direct customers, and the loss of any one of these distributors, value-added resellers or direct customers or failure to collect a receivable from them could adversely affect our operations and financial position.

We market our products through distribution arrangements and value-added resellers and through our direct sales and applications support organization to customers that include OEMs, ODMs and electronic manufacturing service providers ("EMSs"). Receivables from our customers are generally not secured by any type of collateral and are subject to the risk of being uncollectible. Sales to our largest distributor accounted for 22% of our total revenue for both the three and six months ended June 30, 2019. Significant deterioration in the liquidity or financial condition of any of our major customers or any group of our customers could have a material adverse impact on the collectability of our accounts receivable and our future operating results. We primarily conduct our sales on a purchase order basis, and we do not have any long-term supply commitments. 

Moreover, we believe a high percentage of our products are eventually sold to a number of OEMs. Although we communicate with OEMs in an attempt to achieve “design wins,” which are decisions by OEMs and/or ODMs to incorporate our products, we do not have purchase commitments from these end users. Therefore, there can be no assurance that the OEMs and/or ODMs will continue to incorporate our ICs into their products. OEM technical specifications and requirements can change rapidly, and we may not have products that fit new specifications from an end customer for whom we have had previous design wins. We cannot be certain that we will continue to achieve design wins from large OEMs, that our direct customers will continue to be successful in selling to the OEMs, or that the OEMs will be successful in selling products which incorporate our ICs. The loss of any significant customer, any material reduction in orders by any of our significant customers or by their OEM customers, the cancellation of a significant customer order, or the cancellation or delay of a customer’s or an OEM’s significant program or product could reduce our revenue and adversely affect our results of operations and financial condition. 

Due to the nature of our business as a component supplier, we may have difficulty both in accurately predicting our future revenue and appropriately managing our expenses.

Because we provide components for end products and systems, demand for our products is influenced by our customers’ end product demand. As a result, we may have difficulty in accurately forecasting our revenue and expenses. Our revenue depends on the timing, size, and speed of commercial introductions of end products and systems that incorporate our products, all of which are inherently difficult to forecast, as well as the ongoing demand for previously introduced end products and systems. In addition, demand for our products is influenced by our customers’ ability to manage their inventory. Our sales to distributors are subject to higher volatility because they service demand from multiple levels of the supply chain which, in itself, is inherently difficult to forecast. If our customers, including distributors, do not manage their inventory correctly or misjudge their customers’ demand, our shipments to and orders from our customers may vary significantly on a quarterly basis, which could reduce our revenue and adversely affect our results of operations and financial condition. 

36

Our ability to increase product sales and revenue may be constrained by the manufacturing capacity of our suppliers.

Although we provide our suppliers with rolling forecasts of our production requirements, their ability to provide wafers to us is limited by the available capacity, particularly capacity in the geometries we require, at the facilities in which they manufacture wafers for us.  As a result, this lack of capacity has at times constrained our product sales and revenue growth. In addition, an increased need for capacity to meet internal demands or demands of other customers could cause our suppliers to reduce capacity available to us. Our suppliers may also require us to pay amounts in excess of contracted or anticipated amounts for wafer deliveries or require us to make other concessions in order to acquire the wafer supply necessary to meet our customer requirements. If our suppliers extend lead times, limit supplies or the types of capacity we require, or increase prices due to capacity constraints or other factors, our revenue and gross margin may materially decline. In addition, if we experience supply delays or limitations, our customers may reduce their purchase levels with us and/or seek alternative solutions to meet their demand, which could materially and adversely impact our business and results of operations. Delays in increasing third-party manufacturing capacity may also limit our ability to meet customer demand.

We currently depend on third-party suppliers to provide us with wafers for our products. If any of our wafer suppliers become insolvent or capacity constrained and are unable and/or fail to provide us sufficient wafers at acceptable yields and at anticipated costs, our revenue and gross margin may decline or we may not be able to fulfill our customer orders.

We have a supply arrangement with certain suppliers for the production of wafers. Should any of our suppliers become insolvent or capacity constrained, we may not be able to fulfill our customer orders, which would likely cause a decline in our revenue.

While certain aspects of our relationship with these suppliers are contractual, many important aspects of this relationship depend on our suppliers’ continued cooperation and our management of the supplier relationships. In addition, the fabrication of ICs is a highly complex and precise process. Problems in the fabrication process can cause a substantial percentage of wafers to be rejected or numerous ICs on each wafer to be non-functional. This could potentially reduce yields. The failure of our suppliers to supply us wafers at acceptable yields could prevent us from fulfilling our customer orders for our products and would likely cause a decline in our revenue.  

Further, as is common in the semiconductor industry, our customers may reschedule or cancel orders on relatively short notice. If our customers cancel orders after we submit a committed forecast to our suppliers for the corresponding wafers, we may be required to purchase wafers that we may not be able to resell, which would adversely affect our operating results, financial condition and cash flows.

We might not be able to deliver our products on a timely basis if our relationships with our assembly and test subcontractors are disrupted or terminated.

We do not have direct control over product delivery schedules or product quality because all of our products are assembled by third-party subcontractors and a portion of our testing is currently performed by third-party subcontractors. Also, due to the amount of time typically required to qualify assembly and test subcontractors, we could experience delays in the shipment of our products if we were forced to find alternate third parties to assemble or test our products. In addition, events such as global economic crises may materially impact our assembly suppliers’ ability to operate. Any future product delivery delays or disruptions in our relationships with our subcontractors could have a material adverse effect on our operating results, financial condition and cash flows. 

There may be unanticipated costs associated with adding to or supplementing our third-party suppliers’ manufacturing capacity.

We anticipate that future growth of our business will require increased manufacturing capacity on the part of third-party supply foundries, assembly shops, and testing facilities for our products. In order to facilitate such growth, we may need to enter into strategic transactions, investments and other activities. Such activities are subject to a number of risks, including:

• the costs and expense associated with such activities;

• the availability of modern foundries to be developed, acquired, leased or otherwise made available to us or our third-party suppliers;

• the ability of foundries and our third-party suppliers to obtain the advanced equipment used in the production of our products;

• delays in bringing new foundry operations online to meet increased product demand; and

• unforeseen environmental, engineering or manufacturing qualification problems relating to existing or new foundry facilities, including delays in qualification of new foundries by our customers.

These and other risks may affect the ultimate cost and timing of any expansion of our third-party suppliers’ capacity.

37

We purchase inventory in advance based on expected demand for our products, and if demand is not as expected, we may have insufficient or excess inventory, which could adversely impact our financial position.

As a fabless semiconductor company, we purchase our inventory from third-party manufacturers in advance of selling our products. We place orders with our manufacturers based on existing and expected orders from our customers for particular products. While most of our contracts with our customers and distributors include lead time requirements and cancellation penalties that are designed to protect us from misalignment between customer orders and inventory levels, we must nonetheless make some predictions when we place orders with our manufacturers. In the event that our predictions are inaccurate due to unexpected increases in orders or unavailability of product within the timeframe that is required, we may have insufficient inventory to meet our customer demands. In the event that we order products that we are unable to sell due to a decrease in orders, unexpected order cancellations, injunctions due to patent litigation, or product returns, we may have excess inventory which, if not sold, may need to be written down or would result in a decrease in our revenue in future periods as the excess inventory at our distributors is sold. If any of these situations were to arise, it could have a material impact on our business and financial position.

The 2017 Tax Act will continue to have significant effects on our income tax expense, which could result in a material adverse impact on our results of operations, financial condition and cash flows.

In December 2017, the 2017 Tax Act was enacted and included a broad range of tax reforms, including changes to the corporate tax rate, business deductions and international tax provisions. Many of these provisions significantly differed from prior U.S. tax law, resulting in material tax accounting implications for us. Some of the significant new requirements included, but are not limited to, a one-time mandatory deemed repatriation transition tax on previously deferred foreign earnings, a remeasurement of our deferred taxes due to the change in the corporate tax rate, taxation of certain global intangible low-taxed income under the international tax provisions, and limitations on the deductibility of performance-based compensation for officers. Any increase in our income tax expense as a result of the 2017 Tax Act could have a material negative impact on our results of operations and financial condition. In addition, the deemed repatriation transition tax liability, which is payable in installments over eight years, adversely impacts our cash flows. Any changes to our corporate tax planning and strategies as a result of the 2017 Tax Act may not result in a favorable impact on our income tax expense in future periods.

The calculation of the tax impact under the 2017 Tax Act is complex. It requires the collection and analysis of extensive information, the use of estimates and the exercise of significant judgment in determining our tax provision. As we continue to evaluate our existing processes and controls necessary to address the financial reporting effects of the 2017 Tax Act, we also expect further guidance may be forthcoming from the FASB and the SEC, as well as regulations, interpretations and rulings from federal and state tax agencies. If we fail to correctly interpret the tax law or implement effective internal controls on gathering, analyzing and reviewing data used in our calculations, our income tax provision could be misstated, which could have a material adverse impact on our results of operations and financial condition.

The complexity of calculating our tax provision may result in errors that could result in restatements of our financial statements.

Due to the complexity associated with the calculation of our tax provision, including the effects of the 2017 Tax Act, we engage third-party tax advisors to assist us in the calculation. If we or our tax advisors fail to resolve or fully understand certain issues that we may have had in the past and issues that may arise in the future, we could be subject to errors, which, if material, would result in us having to restate our financial statements. Restatements are generally costly and could adversely impact our results of operations, damage our reputation, and/or have a negative impact on the trading price of our common stock.  

Changes in effective tax rates or adverse outcomes resulting from examination of our income tax returns could adversely affect our results.

Our future effective tax rates could be adversely affected by earnings being lower than anticipated in countries where we have lower statutory rates and higher than anticipated in countries where we have higher statutory rates, by changes in the valuation of our deferred tax assets, or by changes in tax laws such as the 2017 Tax Act, regulations, accounting principles or interpretations thereof and discrete items such as vesting of restricted stock units. In addition, we are subject to potential future examinations of our income tax returns by the Internal Revenue Service (“IRS”) and other tax authorities. We assess the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of our provision for income taxes. There can be no assurance that the outcomes from any examinations will not have an adverse effect on our operating results and financial condition.

Implementation of an enterprise resource planning (“ERP”) or other information technology systems could result in significant disruptions to our operations.

From time to time, we may implement new ERP software solutions or upgrade existing systems. Implementation of these solutions and systems is highly dependent on coordination of system providers and internal business teams. We may experience difficulties as we transition to these new or upgraded systems and processes, including loss or corruption of financial, business or customer data. In addition, transitioning to these new systems requires significant capital investments and personnel resources. Difficulties in implementing new or upgraded information systems or any significant system failures could disrupt our operations, which could have a material adverse effect on our capital resources, financial condition or results of operations.

38

System security risks, data protection or privacy breaches, cyber attacks and systems integration issues could disrupt our internal operations and/or harm our reputation, and any such disruption or harm could cause a reduction in our expected revenue, increase our expenses, negatively impact our results of operation or otherwise adversely affect our stock price.

Experienced computer programmers and hackers may be able to penetrate our network security and misappropriate or compromise our confidential and proprietary information, create system disruptions or cause shutdowns. The costs to us to eliminate or alleviate cyber or other security problems, bugs, viruses, worms, malicious software programs and security vulnerabilities could be significant, and our efforts to address these problems may not be successful and could result in interruptions and delays that may impede our sales, manufacturing, distribution, financial reporting or other critical functions.

In the ordinary course of business, we store sensitive data on our internal systems, network and servers, such as proprietary business and financial information, and confidential data pertaining to our customers, suppliers and business partners. The secure maintenance of sensitive information on our networks and the protection features of our solutions are both critical to our operations and business strategy. We devote significant resources to network security, data encryption, and other security measures to protect our systems and data. However, these security measures cannot provide absolute security.  Although we make significant efforts to maintain the security and integrity of our systems and solutions, any destructive or intrusive breach could compromise our networks, creating system disruptions or slowdowns, and the information stored on our networks could be accessed, publicly disclosed, lost or stolen. If any of these types of security breaches were to occur and we were unable to protect sensitive data, our relationships with our business partners and customers could be materially damaged, our reputation could be materially harmed, and we could be exposed to a risk of litigation and possible significant liability.

Portions of our IT infrastructure also may experience interruptions, delays or cessations of service or produce errors in connection with systems integration or migration work that takes place from time to time. We may not be successful in implementing new systems and transitioning data, which could cause business disruptions and our remediation efforts may be expensive, time consuming, disruptive and resource-intensive. Such disruptions could adversely impact our ability to fulfill orders and interrupt other processes. Delayed sales or lost customers resulting from these disruptions could adversely affect our financial results, stock price and reputation.

If we are unsuccessful in legal proceedings brought against us or any of our customers, we could be prevented from selling many of our products and/or be required to pay substantial damages. An unfavorable outcome or an additional award of damages, attorneys’ fees or an injunction could cause our revenue to decline significantly and could severely harm our business and operating results.

From time to time we are a party to various legal proceedings. If we are not successful in litigation that could be brought against us or our customers, we could be ordered to pay monetary fines and/or damages. If we are found liable for willful patent infringement, damages could be significant. We and/or our customers could also be prevented from selling some or all of our products. Moreover, our customers and end users could decide not to use our products, and our products and our customers’ accounts payable to us could be seized. Finally, interim developments in these proceedings could increase the volatility in our stock price as the market assesses the impact of such developments on the likelihood that we will or will not ultimately prevail in these proceedings.

Given our inability to control the timing and nature of significant events in our legal proceedings that either have arisen or may arise, our legal expenses are difficult to forecast and may vary substantially from our publicly disclosed forecasts with respect to any given quarter, which could contribute to increased volatility in our stock price and financial condition.

Historically, we have incurred significant expenses in connection with various legal proceedings that vary with the level of activity in the proceeding. It is difficult for us to forecast our legal expenses for any given quarter, which adversely affects our ability to forecast our expected results of operations in general. We may also be subject to unanticipated legal proceedings, which would result in us incurring unexpected legal expenses. If we fail to meet the expectations of securities or industry analysts as a result of unexpected changes in our legal expenses, our stock price could be materially impacted.

Future legal proceedings may divert our financial and management resources.

The semiconductor industry is characterized by frequent claims of infringement and litigation regarding patent and other intellectual property rights. Patent infringement is an ongoing risk, in part because other companies in our industry could have patent rights that may not be identifiable when we initiate development efforts. Litigation may be necessary to enforce our intellectual property rights, and we may have to defend ourselves against additional infringement claims. Such litigation is very costly. In the event any third party makes a new infringement claim against us or our customers, we could incur additional ongoing legal expenses. In addition, in connection with these legal proceedings, we may be required to post bonds to defend our intellectual property rights in certain countries for an indefinite period of time, until such dispute is resolved. If our legal expenses materially increase or exceed anticipated amounts, our capital resources and financial condition could be adversely affected. Further, if we are not successful in any of our intellectual property defenses, our financial condition could be adversely affected and our business could be harmed. Our management team may also be required to devote a great deal of time and effort to these legal proceedings, which could divert management’s attention from focusing on our operations and adversely affect our business.

39

Failure to protect our proprietary technologies or maintain the right to certain technologies may negatively affect our ability to compete.

We rely heavily on our proprietary technologies. Our future success and competitive position depend in part upon our ability to obtain and maintain protection of certain proprietary technologies used in our products. We pursue patents for some of our new products and unique technologies, and we also rely on a combination of nondisclosure agreements and other contractual provisions, as well as our employees’ commitment to confidentiality and loyalty, to protect our technology, know-how and processes. Despite the precautions we take, it may be possible for unauthorized third parties to copy aspects of our current or future technologies or products, or to obtain and use information that we regard as proprietary. We intend to continue to protect our proprietary technologies, including through patents. However, there can be no assurance that the steps we take will be adequate to protect our proprietary rights, that our patent applications will lead to issued patents, that others will not develop or patent similar or superior products or technologies, or that our patents will not be challenged, invalidated or circumvented by others. Furthermore, the laws of the countries in which our products are or may be developed, manufactured or sold may not protect our products and intellectual property rights to the same extent as laws in the United States. Our failure to adequately protect our proprietary technologies could materially harm our business. 

We face risks in connection with our internal control over financial reporting.

Effective internal control over financial reporting is necessary for us to provide reliable and accurate financial reports. If we cannot provide reliable financial reports or prevent fraud or other financial misconduct, our business and operating results could be harmed. Our failure to implement and maintain effective internal control over financial reporting could result in a material misstatement of our financial statements or otherwise cause us to fail to meet our financial reporting obligations. This, in turn, could result in a loss of investor confidence in the accuracy and completeness of our financial reports, which could have an adverse effect on our results of operations and/or have a negative impact on the trading price of our common stock, and could subject us to stockholder litigation. In addition, we cannot assure you that we will not in the future identify material weaknesses in our internal control over financial reporting that we have not discovered to date, which may impact the reliability of our financial reporting and financial statements. 

Our products must meet specifications, and undetected defects and failures may occur, which may cause customers to return or stop buying our products and may expose us to product liability risk.

Our customers generally establish demanding specifications for quality, performance, and reliability that our products must meet. ICs as complex as ours often encounter development delays and may contain undetected defects or failures when first introduced or after commencement of commercial shipments, which might require product replacement or recall. Further, our third-party manufacturing processes or changes thereof, or raw material used in the manufacturing processes may cause our products to fail. We have from time to time in the past experienced product quality, performance or reliability problems. Our standard warranty period is generally one to two years, which exposes us to significant risks of claims for defects and failures. If defects and failures occur in our products, we could experience lost revenue, increased costs, including warranty expense and costs associated with customer support, cancellations or rescheduling of orders or shipments, and product returns or discounts, any of which would harm our operating results.

In addition, product liability claims may be asserted with respect to our technology or products. Although we currently have insurance, there can be no assurance that we have obtained a sufficient amount of insurance coverage, that asserted claims will be within the scope of coverage of the insurance, or that we will have sufficient resources to satisfy any asserted claims.

The price and availability of commodities (e.g., gold, copper and silicon) may adversely impact our ability to deliver our products in a timely and cost-effective manner, and may adversely affect our business and results of operations.

Our products incorporate commodities such as gold, copper and silicon. An increase in the price or a decrease in the availability of these commodities and similar commodities that we use could negatively impact our business and results of operations.

Fluctuations in the value of the U.S. Dollar relative to other foreign currencies, including the Renminbi, may adversely affect results of operations.

Our manufacturing and packaging suppliers are and will continue to be primarily located in China for the foreseeable future. If the value of the Renminbi rises against the U.S. Dollar, there could be an increase in our manufacturing costs relative to competitors who have manufacturing facilities located in the U.S., which could adversely affect our operations. In addition, our sales are primarily denominated in the U.S. Dollar. If the value of the U.S Dollar rises against other currencies, it may adversely affect the demand for our products in international markets, which could negatively impact our business and results of operations.

40

We incur foreign currency exchange gains or losses related to the timing of payments for transactions between the U.S. and our foreign subsidiaries, which are reported in interest and other income in the statements of operations. Fluctuations in the value of the U.S. Dollar relative to the foreign currencies could increase the amount of foreign currency exchange losses we record, which could have an adverse impact on our results of operations.

Our business is subject to various governmental laws and regulations, and compliance with these regulations may impact our revenue and cause us to incur significant expense. If we fail to maintain compliance with applicable regulations or obtain government licenses and approvals for our desired international trading activities or technology transfers, we may be forced to recall products and cease their distribution, and we could be subject to civil or criminal penalties.

Our business is subject to various significant laws and other legal requirements imposed by the U.S. and other countries we conduct business with, including export control laws such as the Export Administration Act, the Export Administration Regulations ("EAR") and other laws, regulations and requirements governing international trade and technology transfer. These laws and regulations are complex, change frequently and have generally become more stringent over time. We may be required to incur significant expense to comply with these regulations or to remedy violations of these regulations. In addition, if our customers fail to comply with these regulations, we may be required to suspend sales to these customers, which could negatively impact our results of operations. We must conform the manufacture and distribution of our products to various laws and adapt to regulatory requirements in many countries as these requirements change. If we fail to comply with these requirements in the manufacture or distribution of our products, we could be required to pay civil penalties, face criminal prosecution and, in some cases, be prohibited from distributing our products commercially until the products are brought into compliance.

Environmental laws and regulations could cause a disruption in our business and operations.

We are subject to various state, federal and international laws and regulations governing the environment, including those restricting the presence of certain substances in electronic products and making manufacturers of those products financially responsible for the collection, treatment, recycling and disposal of certain products. Such laws and regulations have been passed in several jurisdictions in which we operate, including various European Union member countries and countries in Asia. There can be no assurance that similar laws and regulations will not be implemented in other jurisdictions resulting in additional costs, possible delays in delivering products, and even the discontinuance of existing and planned future products if the cost were to become prohibitive.

We and our manufacturing partners are or will be subject to extensive Chinese government regulation, and the benefit of various incentives from Chinese governments that we and our manufacturing partners receive may be reduced or eliminated, which could increase our costs or limit our ability to sell products and conduct activities in China.

We have manufacturing and testing facilities in China and most of our manufacturing partners are located in China. The Chinese government has broad discretion and authority to regulate the technology industry in China. Additionally, China’s government has implemented policies from time to time to regulate economic expansion in China. It exercises significant control over China’s economic growth through the allocation of resources, controlling payment of foreign currency-denominated obligations, setting monetary policy and providing preferential treatment to particular industries or companies.

Personal privacy, cyber security, and data protection are becoming increasingly significant issues in China. To address these issues, the Standing Committee of the National People’s Congress promulgated the Cyber Security Law of the People’s Republic of China (the “Cyber Security Law”), which took effect on June 1, 2017. The Cyber Security Law sets forth various requirements relating to the collection, use, storage, disclosure and security of data, among other things. Various Chinese agencies are expected to issue additional regulations in the future to define these requirements more precisely. These requirements may increase our costs of compliance. We cannot assure you that we will be able to comply with all of these regulatory requirements. Any failure to comply with the Cyber Security Law and the relevant regulations and policies could result in further cost and liability to us and could adversely affect our business and results of operations. Additionally, increased costs to comply with, and other burdens imposed by, the Cyber Security Law and relevant regulations and policies that are applicable to the businesses of our suppliers, vendors and other service providers, as well as our customers, could adversely affect our business and results of operations.

Any additional new regulations or the amendment or modification of previously implemented regulations could require us and our manufacturing partners to change our business plans, increase our costs, or limit our ability to sell products and conduct activities in China, which could adversely affect our business and operating results.

41

The Chinese government and provincial and local governments also have provided, and continue to provide, various incentives to encourage the development of the semiconductor industry in China. Such incentives include tax rebates, reduced tax rates, favorable lending policies and other measures, some or all of which may be available to our manufacturing partners and to us with respect to our facilities in China. Any of these incentives could be reduced or eliminated by governmental authorities at any time. Any such reduction or elimination of incentives currently provided to us and our manufacturing partners could adversely affect our business and operating results. 

There are inherent risks associated with the operation of our manufacturing and testing facilities in China, which could increase product costs or cause a delay in product shipments.

We have manufacturing and testing facilities in China. We face the following risks, among others, with respect to our operations in China:

• inability to hire and maintain a qualified workforce;

• inability to maintain appropriate and acceptable manufacturing controls; and

• higher than anticipated overhead and other costs of operation.

If we are unable to maintain our facilities in China at fully operational status with qualified workers, appropriate manufacturing controls and reasonable cost levels, we may incur higher costs than our current expense levels, which would affect our gross margins. In addition, if capacity restraints result in significant delays in product shipments, our business and results of operations would be adversely affected.

The average selling prices of products in our markets have historically decreased over time and could do so in the future, which could harm our revenue and gross profits.

Average selling prices of semiconductor products in the markets we serve have historically decreased over time. Our gross profits and financial results will suffer if we are unable to offset any reductions in our average selling prices by reducing our costs, developing new or enhanced products on a timely basis with higher selling prices or gross profits, or increasing our sales volumes. Additionally, because we do not operate our own wafer manufacturing or assembly facilities, we may not be able to reduce our costs as rapidly as companies that operate their own facilities, and our costs may even increase, which could also reduce our profit margins.

Because of the lengthy sales cycles for our products and the fixed nature of a significant portion of our expenses, we may incur substantial expenses before we earn associated revenue and may not ultimately achieve our forecasted sales for our products.

The introduction of new products presents significant business challenges because product development plans and expenditures may be made up to two years or more in advance of any sales. It generally takes us up to 12 months or more to design and manufacture a new product prototype. Only after we have a prototype do we introduce the product to the market and begin selling efforts in an attempt to achieve design wins. This sales process requires us to expend significant sales and marketing resources without any assurance of success. Volume production of products that use our ICs, if any, may not be achieved for an additional period of time after an initial sale. Sales cycles for our products are lengthy for a number of reasons, including:

• our customers usually complete an in-depth technical evaluation of our products before they place a purchase order;

• the commercial adoption of our products by OEMs and ODMs is typically limited during the initial release of their product to evaluate product performance and consumer demand;

• our products must be designed into our customers’ products or systems; and

• the development and commercial introduction of our customers’ products incorporating new technologies frequently are delayed.

As a result of our lengthy sales cycles, we may incur substantial expenses before we earn associated revenue because a significant portion of our operating expenses is relatively fixed and based on expected revenue. The lengthy sales cycles of our products also make forecasting the volume and timing of orders difficult. In addition, the delays inherent in lengthy sales cycles raise additional risks that customers may cancel or change their orders. Our sales are made by purchase orders. Because industry practice allows customers to reschedule or cancel orders on relatively short notice, backlog is not always a good indicator of our future sales. If customer cancellations or product changes occur, we could lose anticipated sales and not have sufficient time to reduce our inventory and operating expenses.   

42

Our success depends on our investment of significant resources in research and development. We may have to invest more resources in research and development than anticipated, which could increase our operating expenses and negatively impact our operating results.

Our success depends on us investing significant amounts of resources into research and development. We expect to have to continue to invest heavily in research and development in the future in order to continue to innovate and introduce new products in a timely manner and increase our revenue and profitability. If we have to invest more resources in research and development than we anticipate, we could see an increase in our operating expenses which may negatively impact our operating results. Also, if we are unable to properly manage and effectively utilize our research and development resources, we could see material adverse effects on our business, financial condition and operating results.

In addition, if new competitors, technological advances by existing competitors, our entry into new markets, or other competitive factors require us to invest significantly greater resources than anticipated in our research and development efforts, our operating expenses would increase. If we are required to invest significantly greater resources than anticipated in research and development efforts without a corresponding increase in revenue, our operating results could decline. Research and development expenses are likely to fluctuate from time to time to the extent we make periodic incremental investments in research and development and these investments may be independent of our level of revenue, which could negatively impact our financial results. In order to remain competitive, we anticipate that we will continue to devote substantial resources to research and development, and we expect these expenses to increase in absolute dollars in the foreseeable future due to the increased complexity and the greater number of products under development.

The loss of any of our key personnel or the failure to attract or retain specialized technical and management personnel could affect our operations or impair our ability to grow our business.

Our future success depends upon our ability to attract and retain highly qualified technical and managerial personnel. We are particularly dependent on the continued services of our key executives, including Michael Hsing, our President and Chief Executive Officer, who founded our company and developed our proprietary process technology. In addition, personnel with highly skilled analog and mixed-signal design engineering expertise are scarce and competition for personnel with these skills is intense. There can be no assurance that we will be able to retain existing key employees or that we will be successful in attracting, integrating or retaining other highly qualified personnel with critical capabilities in the future. If we are unable to retain the services of existing key employees or are unsuccessful in attracting new highly qualified employees quickly enough to meet the demands of our business, including design cycles, our business could be harmed. Furthermore, if we lose key personnel, the search for a qualified replacement and the transition could interrupt our operations as the search could take us longer than expected and divert management resources, and the newly hired employee could take longer than expected to integrate into the team.

If we fail to retain key employees in our sales, applications, finance and legal staff or to make continued improvements to our internal systems, particularly in the accounting and finance area, our business may suffer.

If we fail to continue to adequately staff our sales, applications, financial and legal staff, maintain or upgrade our business systems and maintain internal control that meet the demands of our business, our ability to operate effectively will suffer. The operation of our business also depends upon our ability to retain these employees, as these employees hold a significant amount of institutional knowledge about us and our products, and, if they were to terminate their employment, our sales and internal control over financial reporting could be adversely affected.

We intend to continue to expand our operations, which may strain our resources and increase our operating expenses.

We plan to continue to expand our domestic and foreign operations through internal growth, strategic relationships, and/or acquisitions. We expect that any such expansion will strain our systems and operational and financial controls. In addition, we are likely to incur significantly higher operating costs. To manage our growth effectively, we must continue to improve and expand our systems and controls, as well as hire experienced administrative and financial personnel. If we fail to do so, our growth will be limited. If we fail to effectively manage our planned expansion of operations, our business and operating results may be harmed.

We may not realize the anticipated benefits of any company or business that we acquire. In addition, acquisitions could result in diluting the ownership interests of our stockholders, reduce our cash balances, and cause us to incur debt or to assume contingent liabilities, which could adversely affect our business. We may also be the target of strategic transactions, which could divert our management’s attention and otherwise disrupt our operations and adversely affect our business.

As a part of our business strategy, from time to time we review acquisition prospects that would complement our current product offerings, enhance our design capability or offer other competitive opportunities. As a result of completing acquisitions, we could use a significant portion of our available cash, cash equivalents and short-term investments, issue equity securities that would dilute current stockholders’ percentage ownership, or incur substantial debt or contingent liabilities. Such actions could impact our operating results and the price of our common stock. 

43

In addition, we may be unable to identify or complete prospective acquisitions for various reasons, including competition from other companies in the semiconductor industry, the valuation expectations of acquisition candidates and applicable antitrust laws or related regulations. If we are unable to identify and complete acquisitions, we may not be able to successfully expand our business and product offerings.

We cannot guarantee that any future acquisitions will improve our results of operations or that we will otherwise realize the anticipated benefits of any acquisitions. In addition, if we are unsuccessful in integrating any acquired company or business into our operations or if integration is more difficult than anticipated, we may experience disruptions that could harm our business and result in our failure to realize the anticipated benefits of the acquisitions. Some of the risks that may adversely affect our ability to integrate or realize any anticipated benefits from the acquired companies, businesses or assets include those associated with:

• unexpected losses of key employees or customers of the acquired companies or businesses;

• conforming the acquired company’s standards, processes, procedures and controls with our operations;

• coordinating new product and process development;

• hiring additional management and other critical personnel;

• increasing the scope, geographic diversity and complexity of our operations;

• difficulties in consolidating facilities and transferring processes and know-how;

• difficulties in the assimilation of acquired operations, technologies or products;

• the risk of undisclosed liabilities of the acquired businesses and potential legal disputes with founders or stockholders of acquired companies;

• our inability to commercialize acquired technologies;

• the risk that the future business potential as projected is not realized and as a result, we may be required to take an impairment charge related to goodwill or acquired intangibles that would impact our profitability;

• difficulties in assessing the fair value of earn-out arrangements;

• diversion of management’s attention from other business concerns; and

• adverse effects on existing business relationships with customers.

In addition, third parties may be interested in acquiring us. We will consider and discuss such transactions as we deem appropriate. Such potential transactions may diver the attention of management, and cause us to incur various costs and expenses in investigating and evaluating such transactions, whether or not they are consummated.

If we issue additional shares of stock in the future, it may have a dilutive effect on our stockholders.

We may issue additional shares of common stock in the future in order to raise additional capital to fund our global operations or in connection with an acquisition. We also issue restricted stock units to employees, which convert into shares of common stock upon vesting. Any issuance of our common stock may result in immediate dilution to our stockholders. In addition, the issuance of a significant amount of our common stock may result in additional regulatory requirements, such as stockholder approval.

We compete against many companies with substantially greater financial and other resources, and our market share may be reduced if we are unable to respond to our competitors effectively.

The analog and mixed-signal semiconductor industry is highly competitive, and we expect competitive pressures to continue. Our ability to compete effectively and to expand our business will depend on our ability to continue to recruit applications and design talent, our ability to introduce new products, and our ability to maintain the rate at which we introduce these new products. We compete with domestic and non-domestic semiconductor companies, many of which have substantially greater financial and other resources with which to pursue engineering, manufacturing, marketing, and distribution of their products. We are in direct and active competition, with respect to one or more of our product lines, with many manufacturers of such products, of varying size and financial strength. The number of our competitors has grown due to the expansion of the market segments in which we participate. 

44

We cannot assure you that our products will continue to compete favorably, or that we will be successful in the face of increasing competition from new products and enhancements introduced by existing competitors or new companies entering this market, which would materially and adversely affect our results of operations and our financial condition.

If securities or industry analysts downgrade our stock or do not continue to publish research or reports about our business, our stock price and trading volume could decline.

The trading market for our common stock will depend, in part, on the research and reports that industry or securities analysts publish about us or our business. We do not have any control over these analysts. If one or more of the analysts who cover us downgrade our stock, our stock price would likely decline. If one or more of these analysts cease coverage of us or fail to regularly publish reports on us, we could lose visibility in the financial markets, which in turn could cause our stock price or trading volume to decline.

There can be no assurance that we will continue to declare cash dividends at all or in any particular amounts.

In June 2014, the Board of Directors approved a dividend program pursuant to which we intend to pay quarterly cash dividends on our common stock. The declaration of any future cash dividends is at the discretion of our Board of Directors and will depend on, among other things, our financial condition, results of operations, capital requirements, business conditions, and other factors that our Board of Directors may deem relevant, as well as a determination that cash dividends are in the best interests of our stockholders. Our dividend payments may change from time to time, and we cannot provide assurance that we will continue to declare dividends at all or in any particular amounts. A reduction in or elimination of our dividend payments could have a negative effect on the price of our common stock.

Major earthquakes or other natural disasters and resulting systems outages may cause us significant losses.

Our office in California, the production facilities of our third-party wafer suppliers, our IC testing and manufacturing facilities, a portion of our assembly and research and development activities, and certain other critical business operations are located in or near seismically active regions and are subject to periodic earthquakes. We do not maintain earthquake insurance and could be materially and adversely affected in the event of a major earthquake. Much of our revenue, as well as our manufacturers and assemblers, are concentrated in Asia, particularly in China. Such concentration increases the risk that other natural disasters, labor strikes, terrorism, war, political unrest, epidemics, and/or health advisories could disrupt our operations. In addition, we rely heavily on our internal information and communications systems and on systems or support services from third parties to manage our operations efficiently and effectively. Any of these are subject to failure due to a natural disaster or other disruption. System-wide or local failures that affect our information processing could have material adverse effects on our business, financial condition, operating results and cash flows. 

ITEM 6. EXHIBITS

Exhibit No.	Description
31.1	Certification of Chief Executive Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1*	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.SCH	XBRL Taxonomy Extension Schema
101.CAL	XBRL Taxonomy Extension Calculation
101.DEF	XBRL Taxonomy Extension Definition
101.LAB	XBRL Taxonomy Extension Labels
101.PRE	XBRL Taxonomy Extension Presentation

* This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference in any filings under the Securities Act of 1933 or the Securities Exchange Act of 1934, whether made before or after the date hereof and irrespective of any general incorporation language in any filings.

45

MONOLITHIC POWER SYSTEMS, INC

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	MONOLITHIC POWER SYSTEMS, INC.
Dated: August 2, 2019
	/s/ T. Bernie Blegen
	T. Bernie Blegen
	Chief Financial Officer
	(Duly Authorized Officer and Principal Financial and Accounting Officer)

46

EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO

SECURITIES EXCHANGE ACT RULES 13a-14(a) and 15d-14(a), AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Michael Hsing, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Monolithic Power Systems, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 2, 2019

/s/ Michael Hsing

Michael Hsing

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO

SECURITIES EXCHANGE ACT RULES 13a-14(a) and 15d-14(a), AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, T. Bernie Blegen, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Monolithic Power Systems, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 2, 2019

/s/ T. Bernie Blegen

T. Bernie Blegen

Chief Financial Officer

EX-32.1

Exhibit 32.1

The following certification shall not be deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, whether made before or after the date hereof and irrespective of any general incorporation language in any filings.

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND

CHIEF FINANCIAL OFFICER PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Monolithic Power Systems, Inc., a Delaware corporation, for the quarter ended June 30, 2019, as filed with the Securities and Exchange Commission, each of the undersigned officers of Monolithic Power Systems, Inc. certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) the accompanying report on Form 10-Q of Monolithic Power Systems, Inc. for the quarter ended June 30, 2019, as filed with the Securities and Exchange Commission (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Monolithic Power Systems, Inc. for the periods presented therein.

Date: August 2, 2019

/s/ Michael Hsing

Michael Hsing

Chief Executive Officer

Date: August 2, 2019

/s/ T. Bernie Blegen

T. Bernie Blegen

Chief Financial Officer

XML

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 29, 2019
Document Information [Line Items]
Entity Central Index Key	0001280452
Entity Shell Company	false
Entity Registrant Name	MONOLITHIC POWER SYSTEMS INC
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2019
Entity Small Business	false
Entity Emerging Growth Company	false
Document Quarterly Report	true
Document Transition Report	false
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Entity File Number	000-51026
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0466789
Entity Address, Address Line One	4040 Lake Washington Blvd. NE, Suite 201
Entity Address, City or Town	Kirkland
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98033
City Area Code	425
Local Phone Number	296-9956
Title of 12(b) Security	Common Stock
Trading Symbol	MPWR
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		43,244,000

XML

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 197,012	$ 172,704
Short-term investments	169,459	204,577
Accounts receivable, net	55,398	55,214
Inventories	143,622	136,384
Other current assets	19,645	11,931
Total current assets	585,136	580,810
Property and equipment, net	213,830	150,001
Long-term investments	3,215	3,241
Goodwill	6,571	6,571
Deferred tax assets, net	16,686	16,830
Other long-term assets	42,675	35,979
Total assets	868,113	793,432
Current liabilities:
Accounts payable	26,544	22,678
Accrued compensation and related benefits	22,960	18,799
Other accrued liabilities	38,616	38,962
Total current liabilities	88,120	80,439
Income tax liabilities	32,402	34,375
Other long-term liabilities	43,437	38,525
Total liabilities	163,959	153,339
Commitments and contingencies
Stockholders' equity:
Common stock and additional paid-in capital: $0.001 par value; shares authorized: 150,000; shares issued and outstanding: 43,234 and 42,505, respectively	503,759	450,908
Retained earnings	204,533	194,728
Accumulated other comprehensive loss	(4,138)	(5,543)
Total stockholders’ equity	704,154	640,093
Total liabilities and stockholders’ equity	$ 868,113	$ 793,432

XML

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares shares in Thousands	Jun. 30, 2019	Dec. 31, 2018
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)	43,234	42,505
Common stock, shares outstanding (in shares)	43,234	42,505

XML

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue	$ 151,007	$ 139,761	$ 292,370	$ 268,911
Cost of revenue	67,782	62,197	131,139	119,852
Gross profit	83,225	77,564	161,231	149,059
Operating expenses:
Research and development	27,545	23,481	53,003	45,091
Selling, general and administrative	35,058	28,561	65,611	55,879
Litigation expense	503	640	781	1,171
Total operating expenses	63,106	52,682	119,395	102,141
Income from operations	20,119	24,882	41,836	46,918
Interest and other income, net	2,229	2,232	5,569	2,673
Income before income taxes	22,348	27,114	47,405	49,591
Income tax expense	1,655	2,908	531	3,529
Net income	$ 20,693	$ 24,206	$ 46,874	$ 46,062
Net income per share:
Basic (in dollars per share)	$ 0.48	$ 0.57	$ 1.09	$ 1.09
Diluted (in dollars per share)	$ 0.45	$ 0.55	$ 1.03	$ 1.04
Weighted-average shares outstanding:
Basic (in shares)	43,109	42,237	42,929	42,079
Diluted (in shares)	45,483	44,400	45,358	44,341

XML

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net income	$ 20,693	$ 24,206	$ 46,874	$ 46,062
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(3,709)	(6,862)	(32)	(2,473)
Change in unrealized gain (loss) on available-for-sale securities, net of tax of $(64), $0, $(162) and $0, respectively	611	115	1,437	(1,045)
Other comprehensive income (loss), net of tax	(3,098)	(6,747)	1,405	(3,518)
Comprehensive income	$ 17,595	$ 17,459	$ 48,279	$ 42,544

XML

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Change in unrealized gain (loss) on available-for-sale securities, tax	$ (64)	$ 0	$ (162)	$ 0

XML

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock Including Additional Paid in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2017	41,614
Balance at Dec. 31, 2017	$ 376,586	$ 143,608	$ 1,813	$ 522,007
Net income	0	46,062	0	46,062
Other comprehensive loss	0	0	(3,518)	(3,518)
Dividends and dividend equivalents declared	$ 0	(27,190)	0	(27,190)
Vesting of restricted stock units (in shares)	649
Vesting of restricted stock units	$ 8,709	0	0	8,709
Stock-based compensation expense	$ 30,950	0	0	30,950
Exercise of stock options (in shares)	4
Exercise of stock options	$ 59	0	0	59
Shares issued under the employee stock purchase plan (in shares)	18
Shares issued under the employee stock purchase plan	$ 1,562	0	0	1,562
Cumulative effect of a change in accounting principles at Jun. 30, 2018	$ 0	379	0	379
Balance (in shares) at Jun. 30, 2018	42,285
Balance at Jun. 30, 2018	$ 417,866	162,859	(1,705)	579,020
Balance (in shares) at Mar. 31, 2018	42,145
Balance at Mar. 31, 2018	$ 401,007	152,257	5,042	558,306
Net income	0	24,206	0	24,206
Other comprehensive loss	0	0	(6,747)	(6,747)
Dividends and dividend equivalents declared	$ 0	(13,604)	0	(13,604)
Vesting of restricted stock units (in shares)	137
Vesting of restricted stock units	$ 916	0	0	916
Stock-based compensation expense	$ 15,900	0	0	15,900
Exercise of stock options (in shares)	3
Exercise of stock options	$ 43	0	0	43
Cumulative effect of a change in accounting principles at Jun. 30, 2018	$ 0	379	0	379
Balance (in shares) at Jun. 30, 2018	42,285
Balance at Jun. 30, 2018	$ 417,866	162,859	(1,705)	$ 579,020
Balance (in shares) at Dec. 31, 2018	42,505			42,505
Balance at Dec. 31, 2018	$ 450,908	194,728	(5,543)	$ 640,093
Net income	0	46,874	0	46,874
Other comprehensive loss	0	0	1,405	1,405
Dividends and dividend equivalents declared	$ 0	(37,069)	0	(37,069)
Vesting of restricted stock units (in shares)	715
Vesting of restricted stock units	$ 12,471	0	0	12,471
Stock-based compensation expense	$ 38,753	0	0	38,753
Shares issued under the employee stock purchase plan (in shares)	14
Shares issued under the employee stock purchase plan	$ 1,627	0	0	$ 1,627
Balance (in shares) at Jun. 30, 2019	43,234			43,234
Balance at Jun. 30, 2019	$ 503,759	204,533	(4,138)	$ 704,154
Balance (in shares) at Mar. 31, 2019	43,033
Balance at Mar. 31, 2019	$ 478,913	202,378	(1,040)	680,251
Net income	0	20,693	0	20,693
Other comprehensive loss	0	0	(3,098)	(3,098)
Dividends and dividend equivalents declared	$ 0	(18,538)	0	(18,538)
Vesting of restricted stock units (in shares)	201
Vesting of restricted stock units	$ 2,088	0	0	2,088
Stock-based compensation expense	$ 22,758	0	0	$ 22,758
Balance (in shares) at Jun. 30, 2019	43,234			43,234
Balance at Jun. 30, 2019	$ 503,759	$ 204,533	$ (4,138)	$ 704,154

XML

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Retained Earnings [Member]
Dividends and dividend equivalents declared per share (in dollars per share)	$ 0.40	$ 0.30	$ 0.40	$ 0.60
Dividends and dividend equivalents declared per share (in dollars per share)	$ 0.40	$ 0.30	$ 0.80	$ 0.60

XML

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 46,874	$ 46,062
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,994	5,830
Loss on sales of property and equipment	15	0
Amortization of premium on available-for-sale securities	216	808
Gain on deferred compensation plan investments	(2,555)	(233)
Deferred taxes, net	(20)	12
Stock-based compensation expense	38,719	30,921
Changes in operating assets and liabilities:
Accounts receivable	(176)	(16,325)
Inventories	(7,205)	(29,602)
Other assets	(42)	(983)
Accounts payable	2,153	3,032
Accrued compensation and related benefits	4,124	103
Accrued liabilities	423	539
Income tax liabilities	(6,627)	1,546
Net cash provided by operating activities	82,893	41,710
Cash flows from investing activities:
Purchases of property and equipment	(77,638)	(12,998)
Acquisition of in-place leases	(981)	0
Purchases of short-term investments	(21,546)	(67,002)
Proceeds from maturities and sales of short-term investments	57,999	51,059
Proceeds from sales of long-term investments	75	0
Proceeds from sales of property and equipment	1,456	0
Contributions to deferred compensation plan, net	(1,435)	(911)
Net cash used in investing activities	(42,070)	(29,852)
Cash flows from financing activities:
Property and equipment purchased on extended payment terms	(3)	0
Proceeds from exercise of stock options	0	59
Proceeds from vesting of restricted stock units	12,471	8,709
Proceeds from shares issued under the employee stock purchase plan	1,627	1,562
Dividends and dividend equivalents paid	(30,784)	(21,467)
Net cash used in financing activities	(16,689)	(11,137)
Effect of change in exchange rates	175	(407)
Net increase in cash, cash equivalents and restricted cash	24,309	314
Cash, cash equivalents and restricted cash, beginning of period	172,818	82,874
Cash, cash equivalents and restricted cash, end of period	197,127	83,188
Supplemental disclosures for cash flow information:
Cash paid for taxes	7,168	3,884
Non-cash investing and financing activities:
Liability accrued for property and equipment purchases	3,028	2,939
Liability accrued for dividends and dividend equivalents	$ 19,749	$ 14,530

XML

Note 1 - Basis of Presentation

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

1. BASIS OF PRESENTATION

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-K for the year ended  December 31, 2018, filed with the SEC on  March 1, 2019.

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-Q are not necessarily indicative of the results that  may be expected for the year ending  December 31, 2019 or for any other future periods.

Summary of Significant Accounting Policies

Except for the changes related to leases discussed in Note 6, there have been no other changes to the Company’s significant accounting policies during the three and six months ended  June 30, 2019, as compared to the significant accounting policies described in the Company’s audited consolidated financial statements included in the Annual Report on Form 10-K for the year ended  December 31, 2018.

Recently Adopted Accounting Pronouncement

In  February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02, Leases (Topic 842), which requires entities to recognize right-of-use (“ROU”) assets and lease liabilities on the balance sheets for leases with terms greater than 12 months. In addition, the standard applies to leases embedded in service or other arrangements. The Company adopted the standard on January 1, 2019 using the modified retrospective method and did not restate comparative periods, as permitted by the standard. In addition, the Company elected the transition practical expedients to not reassess its contracts that existed prior to January 1, 2019.

Upon adoption, the Company recognized ROU assets and lease liabilities of its outstanding operating leases on the Condensed Consolidated Balance Sheets, primarily related to real estate. The adoption did not have a material impact on the Condensed Consolidated Statements of Operations or the Condensed Consolidated Statements of Cash Flows. See Note 6 for further discussion.

Recent Accounting Pronouncements Not Yet Adopted as of June 30, 2019

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework — Changes to the Disclosure Requirements for Fair Value Measurement, which changes certain disclosure requirements, including those related to Level 3 fair value measurements. The standard will be effective for annual reporting periods beginning after December 15, 2019. Early adoption is permitted. The Company is evaluating the impact of the adoption on its disclosures.

In  January 2017, the FASB issued ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 350), which simplifies the accounting for goodwill impairment. The guidance removes step two of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. Entities will continue to have the option to perform a qualitative assessment to determine if a quantitative impairment test is necessary. The standard will be applied prospectively, and will be effective for annual reporting periods beginning after  December 15, 2019. Early adoption is permitted. The Company is evaluating the impact of the adoption on its annual goodwill impairment test.

In  June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326), which introduces a model based on expected losses to estimate credit losses for most financial assets and certain other instruments. In addition, for available-for-sale debt securities, entities will be required to recognize an allowance for credit losses rather than reductions in the amortized cost of the securities. The standard will be effective for annual reporting periods beginning after  December 15, 2019, with early adoption permitted for annual reporting periods beginning after  December 15, 2018. Entities will apply the standard by recording a cumulative-effect adjustment to retained earnings. The Company is evaluating the impact of the adoption on its consolidated financial position, results of operations, cash flows and disclosures.

XML

Note 2 - Revenue Recognition

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Revenue from Contract with Customer [Text Block]

2. REVENUE RECOGNITION

Revenue from Product Sales

The Company generates revenue primarily from product sales, which include assembled and tested integrated circuits, as well as dies in wafer form. These product sales were 99% and 98% of the Company’s total revenue for the three months ended June 30, 2019 and 2018, respectively, and 99% and 97% of the Company’s total revenue for the six months ended June 30, 2019 and 2018, respectively. The remaining revenue primarily includes royalty revenue from licensing arrangements and revenue from wafer testing services performed for third parties, which have not been significant in all periods presented. See Note 8 for the disaggregation of the Company’s revenue by geographic regions and by product families.

The Company sells its products primarily through third-party distributors, value-added resellers, original equipment manufacturers, original design manufacturers and electronic manufacturing service providers. For the three months ended June 30, 2019 and 2018, 77% and 86%, respectively, of the Company’s sales were made through distribution arrangements. For the six months ended June 30, 2019 and 2018, 80% and 87%, respectively, of the Company’s sales were made through distribution arrangements. These distribution arrangements contain enforceable rights and obligations specific to those distributors and not the end customers. Purchase orders, which are generally governed by sales agreements or the Company's standard terms of sale, set the final terms for unit price, quantity, shipping and payment agreed by both parties. The Company considers purchase orders to be the contracts with customers. The unit price as stated on the purchase orders is considered the observable, stand-alone selling price for the arrangements.

The Company recognizes revenue when it satisfies a performance obligation by transferring control of the promised goods or services to its customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. The Company excludes taxes assessed by government authorities, such as sales taxes, from revenue.

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 recognized when the products are shipped and delivered to be held at customers’ designated locations because the Company continues to control the products and retain ownership, and the customers do not have an unconditional obligation to pay. The Company recognizes revenue when the customers consume the products from the consigned inventory locations or, in some cases, after a 60-day period from the delivery date has passed, at which time control transfers to the customers and the Company invoices them for payment.

Variable Consideration

The Company accounts for price adjustment and stock rotation rights as variable consideration that reduces the transaction price, and recognizes that reduction in the same period the associated 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 an analysis 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 have price adjustment rights. The Company records a credit against accounts receivable for the estimated price adjustments, with a corresponding reduction to revenue.

In addition, certain distributors have limited stock rotation rights that permit the return of a small percentage of the previous six months’ purchases in accordance with the contract terms. The Company estimates the stock rotation returns based on an analysis of historical returns, and the current level of inventory in the distribution channel. The Company records a liability for the stock rotation reserve, with a corresponding reduction to revenue. In addition, the Company recognizes an asset for product returns which represents the right to recover products from the customers related to stock rotations, with a corresponding reduction to cost of revenue.

Contract Balances

The Company records a receivable when it has an unconditional right to receive consideration after the performance obligations are satisfied. As of  June 30, 2019 and December 31, 2018, accounts receivable totaled $55.4 million and $55.2 million, respectively. The Company did not record any allowance for doubtful accounts as of June 30, 2019 and December 31, 2018.

For certain customers located in Asia, the Company requires cash payments 2 weeks before the products are scheduled to be shipped to the customers. The Company records these payments received in advance of performance as customer prepayments within current accrued liabilities. As of  June 30, 2019 and December 31, 2018, customer prepayments totaled $3.2 million and $2.5 million, respectively. The increase in the customer prepayment balance for the six months ended June 30, 2019 resulted from an increase in unfulfilled customer orders for which the Company has received payments. For the six months ended  June 30, 2019, the Company recognized $2.5 million of revenue that was included in the customer prepayment balance as of  December 31, 2018.

Contract Costs

The Company pays sales commissions based on the achievement of pre-determined product sales targets. As the Company recognizes product sales at a point in time, sales commissions are expensed as incurred.

Practical Expedients

The Company’s standard payment terms generally require customers to pay 30 to 60 days after the Company satisfies the performance obligations. For those customers who are required to pay in advance, the Company satisfies the performance obligations generally within 2 weeks. The Company has elected not to determine whether contacts with customers contain significant financing components.

As of  June 30, 2019, the Company’s unsatisfied performance obligations primarily included products held in consignment arrangements and customer purchase orders for products that the Company has not yet shipped. Because the Company expects to fulfill these performance obligations within one year, the Company has elected not to disclose the amount of these remaining performance obligations or the timing of recognition.

XML

Note 3 - Stock-based Compensation

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Share-based Payment Arrangement [Text Block]

3. STOCK-BASED COMPENSATION

2014 Equity Incentive Plan (the “2014 Plan”)

The Board of Directors adopted the 2014 Plan in  April 2013, and the stockholders approved it in  June 2013. In  October 2014, the Board of Directors approved certain amendments to the 2014 Plan. The 2014 Plan, as amended, became effective on  November 13, 2014 and provides for the issuance of up to 5.5 million shares. The 2014 Plan will expire on  November 13, 2024. As of  June 30, 2019, 1.6 million shares remained available for future issuance under the 2014 Plan. 

Stock-Based Compensation Expense

The Company recognized stock-based compensation expenses as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Cost of revenue	$	663	$	480	$	1,193	$	913
Research and development		5,412		4,194		9,841		8,188
Selling, general and administrative		16,634		11,218		27,685		21,820
Total stock-based compensation expense	$	22,709	$	15,892	$	38,719	$	30,921
Tax benefit related to stock-based compensation	$	706	$	829	$	1,544	$	1,959

Restricted Stock Units (“RSUs”)

The Company’s RSUs include time-based RSUs, RSUs with performance conditions (“PSUs”), RSUs with market conditions (“MSUs”), and RSUs with both market and performance conditions (“MPSUs”). Vesting of awards with performance conditions or market conditions is subject to the achievement of pre-determined performance goals and the approval of such achievement by the Compensation Committee of the Board of Directors (the “Compensation Committee”). All awards include service conditions which require continued employment with the Company.

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, 2019		240		$	95.38		2,174		$	61.61		2,219		$	35.69		4,633		$	50.94
Granted		44		$	140.59		440	(1)	$	103.02		-		$	-		484		$	106.41
Vested		(68	)	$	80.27		(485	)	$	55.36		(162	)	$	23.57		(715	)	$	50.52
Forfeited		(4	)	$	106.51		-		$	-		(4	)	$	68.48		(8	)	$	87.85
Outstanding at June 30, 2019		212		$	109.33		2,129		$	71.60		2,053		$	36.58		4,394		$	57.05

(1) Amount reflects the number of PSUs that  may ultimately be earned based on management’s probability assessment of the achievement of performance conditions at each reporting period.

The intrinsic value related to vested RSUs was $26.3 million and $15.6 million for the three months ended June 30, 2019 and 2018, respectively. The intrinsic value related to vested RSUs was $84.0 million and $65.2 million for the six months ended June 30, 2019 and 2018, respectively. As of June 30, 2019, the total intrinsic value of all outstanding RSUs was $551.2 million, based on the closing stock price of $135.78. As of June 30, 2019, unamortized compensation expense related to all outstanding RSUs was $136.5 million with a weighted-average remaining recognition period of approximately 3.5 years. 

Cash proceeds from vested PSUs with a purchase price totaled $12.5 million and $8.7 million for the six months ended June 30, 2019 and 2018, respectively. 

Time-Based RSUs:

For the six months ended June 30, 2019, the Compensation Committee granted 44,000 RSUs with service conditions to non-executive employees and non-employee directors. The RSUs vest over 4 years for employees and 1 year for directors, subject to continued service with the Company.  

2019 PSUs:

In  February 2019, the Compensation Committee granted 151,000 PSUs to the executive officers, which represent a target number of shares to be earned based on the Company’s average 2-year (2019 and 2020) revenue growth rate compared against the analog industry’s average two-year revenue growth rate as published by the Semiconductor Industry Association (“2019 Executive PSUs”). The maximum number of shares that an executive officer can earn is 300% of the target number of the 2019 Executive PSUs. 50% of the 2019 Executive PSUs will vest in the first quarter of 2021 if the pre-determined performance goals are met during the performance period. The remaining 2019 Executive PSUs will vest over the following 2 years on a quarterly basis. Assuming the achievement of the highest level of performance goals, the total stock-based compensation cost for the 2019 Executive PSUs is $46.6 million.

The 2019 Executive PSUs contain a purchase price feature, which requires the employees to pay the Company $30 per share upon vesting of the shares. Shares that do not vest will not be subject to the purchase price payment. The Company determined the grant date fair value of the 2019 Executive PSUs using the Black-Scholes model with the following assumptions: stock price of $130.67, expected term of 2.6 years, expected volatility of 29.0% and risk-free interest rate of 2.5%.

Employee Stock Purchase Plan (“ESPP”)

No shares were issued under the ESPP for the three months ended June 30, 2019 and 2018. For the six months ended June 30, 2019 and 2018, 14,000 and 18,000 shares, respectively, were issued under the ESPP. As of June 30, 2019, 4.5 million shares were available for future issuance.

The intrinsic value of the shares issued was $0.3 million and $0.5 million for the six months ended June 30, 2019 and 2018, respectively. As of June 30, 2019, the unamortized expense was $0.1 million, which will be recognized through the third quarter of 2019. The Black-Scholes model was used to value the employee stock purchase rights with the following weighted-average assumptions: 

	Six Months Ended June 30,
	2019			2018
Expected term (in years)		0.5			0.5
Expected volatility		37.3	%		28.2	%
Risk-free interest rate		2.5	%		1.8	%
Dividend yield		1.2	%		1.0	%

Cash proceeds from the shares issued under the ESPP were $1.6 million for both the six months ended June 30, 2019 and 2018.  

XML

Note 4 - Balance Sheet Components

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Supplemental Balance Sheet Disclosures [Text Block]

4. BALANCE SHEET COMPONENTS

Inventories 

Inventories consist of the following (in thousands): 

	June 30,		December 31,
	2019		2018
Raw materials	$	42,278	$	43,017
Work in process		36,390		38,674
Finished goods		64,954		54,693
Total	$	143,622	$	136,384

Other Current Assets

Other current assets consist of the following (in thousands):

	June 30,		December 31,
	2019		2018
Asset held for sale	$	7,076	$	-
RSU tax withholding proceeds receivable		4,522		39
Prepaid expense		2,913		3,425
Interest receivable		1,516		1,441
Assets for product returns		1,274		1,602
Value-added tax receivable		590		423
Prepaid wafer refund receivable		-		4,297
Other		1,754		704
Total	$	19,645	$	11,931

Other Long-Term Assets

Other long-term assets consist of the following (in thousands):

	June 30,		December 31,
	2019		2018
Deferred compensation plan assets	$	35,961	$	31,970
Operating lease ROU assets		2,688		-
Prepaid expense		2,520		2,713
Other		1,506		1,296
Total	$	42,675	$	35,979

Other Accrued Liabilities

Other accrued liabilities consist of the following (in thousands): 

	June 30,		December 31,
	2019		2018
Dividends and dividend equivalents	$	21,554	$	15,044
Stock rotation and sales returns		4,339		5,363
Customer prepayments		3,203		2,520
Income tax payable		2,359		7,018
Warranty		1,748		4,564
Operating lease liabilities		1,097		-
Commissions		945		1,369
Other		3,371		3,084
Total	$	38,616	$	38,962

Other Long-Term Liabilities

Other long-term liabilities consist of the following (in thousands):

	June 30,		December 31,
	2019		2018
Deferred compensation plan liabilities	$	36,594	$	32,283
Dividend equivalents		5,921		6,145
Operating lease liabilities		893		-
Other		29		97
Total	$	43,437	$	38,525

XML

Note 5 - Real Estate Transaction

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Real Estate Transaction [Text Block]

5. REAL ESTATE TRANSACTION

In March 2019, the Company completed the purchase of an office building and land located in Kirkland, Washington for $52.9 million in cash. The property also has in-place leases which were assumed by the Company. The Company accounted for the purchase as an asset acquisition and capitalized $0.4 million of transaction costs.

The purchase price allocation was as follows (in thousands):

Building	$	30,078
Land		22,254
In-place leases		981
Total	$	53,313

The fair value of the building was determined based on the income approach, which considered the discounted cash flows and direct capitalization analysis, and the sales comparison approach. The fair value of land was determined based on the sales comparison approach. The fair value of the in-place leases was determined primarily based on the analysis of the economic benefits of certain cost savings to acquire new tenants.

The building is depreciated over a useful life of 40 years and the in-place leases are amortized over the average remaining lease terms of 3.5 years. Land is not depreciated.

XML

Note 6 - Leases

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Leases Disclosure [Text Block]

6. LEASES

Lessee

The Company has operating leases for administrative and sales and marketing offices, manufacturing operations and research and development facilities, employee housing units, and certain equipment. The leases have remaining lease terms from less than a year to 4 years. Some of the leases include options to renew the lease term for up to 5 years or on a month-to-month basis. The Company does not have finance lease arrangements.

As permitted by Topic 842, the Company does not recognize leases with a term of 12 months or less at the commencement date on the Condensed Consolidated Balance Sheets. For those lease arrangements that contain lease and nonlease components, the Company has elected the practical expedient to combine them as single lease components. As of June 30, 2019, operating lease ROU assets totaled $2.7 million and operating lease liabilities totaled $2.0 million. The Company recognizes operating lease costs on a straight-line basis over the lease term.

Because the implicit rate in each lease is not readily determinable, the Company uses its incremental borrowing rate to determine the present value of the remaining lease payments. 

The following tables summarize certain information related to the leases (in thousands, except for years and percentages):

	Three Months Ended		Six Months Ended
	June 30, 2019		June 30, 2019
Lease costs:
Operating lease costs	$	332	$	637
Short-term lease costs		84		182
Total lease costs	$	416	$	819

	Three Months Ended		Six Months Ended
	June 30, 2019		June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	423	$	727
ROU assets obtained in exchange for operating lease liabilities (1)	$	317	$	2,581

	June 30, 2019
Weighted-average remaining lease term (in years)		2.2
Weighted-average discount rate		4.2	%

(1) For the six months ended June 30, 2019, the amount includes $2.2 million for operating leases existing on January 1, 2019.

As of June 30, 2019, the maturities of the lease liabilities are as follows (in thousands):

2019 (remaining six months)	$	569
2020		954
2021		348
2022		210
2023		57
Total remaining lease payments		2,138
Less: imputed interest		(148	)
Total lease liabilities	$	1,990
Reported as:
Current liabilities	$	1,097
Long-term liabilities	$	893

Lessor 

The Company owns certain office buildings and leases a portion of these properties to third parties under arrangements that are classified as operating leases. The leases have remaining lease terms from less than a year to 5 years. Some of the leases include options to renew the lease term for up to 5 years.

For the three and six months ended June 30, 2019, income related to lease payments was $0.7 million and $0.9 million, respectively. As of  June 30, 2019, future income related to lease payments is as follows (in thousands):

2019 (remaining six months)	$	703
2020		1,105
2021		880
2022		427
2023		91
2024		12
Total income related to lease payments	$	3,218

XML

Note 7 - Net Income Per Share

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Earnings Per Share [Text Block]

7. NET INCOME PER SHARE

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 fulfill their service requirement and the awards do not vest. Accordingly, these awards are not treated as participating securities in the net income per share calculation. 

The following table sets forth the computation of basic and diluted net income per share (in thousands, except per-share amounts): 

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Numerator:
Net income	$	20,693	$	24,206	$	46,874	$	46,062
Denominator:
Weighted-average outstanding shares used to compute basic net income per share		43,109		42,237		42,929		42,079
Effect of dilutive securities		2,374		2,163		2,429		2,262
Weighted-average outstanding shares used to compute diluted net income per share		45,483		44,400		45,358		44,341
Net income per share:
Basic	$	0.48	$	0.57	$	1.09	$	1.09
Diluted	$	0.45	$	0.55	$	1.03	$	1.04

XML

Note 8 - Segment and Geographic Information

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Segment Reporting Disclosure [Text Block]

8. SEGMENT AND GEOGRAPHIC INFORMATION

The Company operates in one reportable segment that includes the design, development, marketing and sale of high-performance analog solutions for the computing and storage, automotive, industrial, communications and consumer markets. The Company’s chief operating decision maker is its Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. The Company derives a majority of its revenue from sales to customers located outside North America, with geographic revenue based on the customers’ ship-to locations.  

The Company sells its products primarily through third-party distributors and value-added resellers, and directly to original equipment manufacturers, original design manufacturers and electronic manufacturing service providers. The following table summarizes those customers with sales equal to 10% or more of the Company's total revenue, or with accounts receivable balances equal to 10% or more of the Company’s total accounts receivable: 

	Revenue												Accounts Receivable
	Three Months Ended June 30,						Six Months Ended June 30,						June 30,			December 31,
Customer	2019			2018			2019			2018			2019			2018
Company A (distributor)		22	%		20	%		22	%		20	%		21	%		25	%
Company B (distributor)		*			10	%		*			10	%		12	%		16	%
Company A (direct)		13	%		*			10	%		*			16	%		*

* Represents less than 10%.

The Company’s agreements with third-party distributors were made in the ordinary course of business and  may be terminated with or without cause by these customers with advance notice. Although the Company  may experience a short-term disruption in the distribution of its products and a short-term decline in revenue if its agreement with any of these customers was terminated, the Company believes that such termination would not have a material adverse effect on its financial statements because it would be able to engage alternative distributors, resellers and other distribution channels to deliver its products to end customers within a short period following the termination of the agreement with the customer.  

The following is a summary of revenue by geographic regions (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
Country or Region	2019		2018		2019		2018
China	$	94,837	$	81,207	$	171,035	$	154,072
Taiwan		16,018		18,150		37,365		34,541
Europe		13,040		12,651		26,024		24,116
Korea		9,623		8,853		19,234		18,640
Southeast Asia		7,122		7,977		15,794		17,002
Japan		6,292		6,486		12,934		12,100
United States		4,013		4,274		9,819		8,029
Other		62		163		165		411
Total	$	151,007	$	139,761	$	292,370	$	268,911

The following is a summary of revenue by product family (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
Product Family	2019		2018		2019		2018
DC to DC	$	139,691	$	127,496	$	272,402	$	246,765
Lighting Control		11,316		12,265		19,968		22,146
Total	$	151,007	$	139,761	$	292,370	$	268,911

The following is a summary of property and equipment, net, by geographic regions (in thousands):

	June 30,		December 31,
Country	2019		2018
China	$	101,872	$	93,096
United States		94,296		39,054
Taiwan		16,795		16,972
Other		867		879
Total	$	213,830	$	150,001

XML

Note 9 - Commitments and Contingencies

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Commitments and Contingencies Disclosure [Text Block]

9. COMMITMENTS AND CONTINGENCIES

Product Warranties

The following table presents changes in the warranty reserve (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Balance at beginning of period	$	2,045		$	3,740		$	4,564		$	2,416
Warranty provision for product sales		311			335			579			1,814
Settlements made		(28	)		(9	)		(2,299	)		(64	)
Unused warranty provision		(580	)		(115	)		(1,096	)		(215	)
Balance at end of period	$	1,748		$	3,951		$	1,748		$	3,951

Purchase Commitments

The Company has outstanding purchase commitments with its suppliers and other parties that require the future purchase of goods or services, which primarily consist of wafer purchases, assembly and other manufacturing services, construction services and license arrangements. As of  June 30, 2019, the Company’s outstanding purchase obligations totaled approximately $71.4 million.

Litigation

The Company is a party to actions and proceedings in the ordinary course of business, including potential litigation initiated by its stockholders, 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 require the expenditure of significant funds and the diversion of other resources to prosecute and defend. The Company defends itself vigorously against any such claims. As of  June 30, 2019, there were no material pending legal proceedings to which the Company was a party.

XML

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Financial Instruments Disclosure [Text Block]

10. CASH, CASH EQUIVALENTS, INVESTMENTS AND RESTRICTED CASH

The following is a summary of the Company’s cash, cash equivalents and investments (in thousands): 

	June 30,		December 31,
	2019		2018
Cash, cash equivalents and investments:
Cash	$	155,192	$	131,569
Money market funds		41,820		41,135
Corporate debt securities		135,548		170,909
U.S. treasuries and government agency bonds		32,311		32,068
Certificates of deposit		1,600		1,600
Auction-rate securities backed by student-loan notes		3,215		3,241
Total	$	369,686	$	380,522

	June 30,		December 31,
	2019		2018
Reported as:
Cash and cash equivalents	$	197,012	$	172,704
Short-term investments		169,459		204,577
Long-term investments		3,215		3,241
Total	$	369,686	$	380,522

The contractual maturities of the Company’s short-term and long-term available-for-sale investments are as follows (in thousands):

	June 30,		December 31,
	2019		2018
Due in less than 1 year	$	123,930	$	125,845
Due in 1 - 5 years		45,529		78,732
Due in greater than 5 years		3,215		3,241
Total	$	172,674	$	207,818

The following tables summarize the unrealized gain and loss positions related to the Company’s available-for sale investments (in thousands): 

	June 30, 2019
	Amortized Cost		Unrealized Gains		Unrealized Losses			Total Fair Value		Fair Value of Investments in Unrealized Loss Position
Money market funds	$	41,820	$	-	$	-		$	41,820	$	-
Corporate debt securities		135,520		224		(196	)		135,548		67,113
U.S. treasuries and government agency bonds		32,307		20		(16	)		32,311		15,723
Certificates of deposit		1,600		-		-			1,600		-
Auction-rate securities backed by student-loan notes		3,495		-		(280	)		3,215		3,215
Total	$	214,742	$	244	$	(492	)	$	214,494	$	86,051

	December 31, 2018
	Amortized Cost		Unrealized Gains		Unrealized Losses			Total Fair Value		Fair Value of Investments in Unrealized Loss Position
Money market funds	$	41,135	$	-	$	-		$	41,135	$	-
Corporate debt securities		172,288		7		(1,386	)		170,909		166,204
U.S. treasuries and government agency bonds		32,207		2		(141	)		32,068		28,507
Certificates of deposit		1,600		-		-			1,600		-
Auction-rate securities backed by student-loan notes		3,570		-		(329	)		3,241		3,241
Total	$	250,800	$	9	$	(1,856	)	$	248,953	$	197,952

As of  June 30, 2019 and  December 31, 2018, unrealized losses that had been in a continuous loss position for 12 months or longer were $0.5 million and $1.6 million, respectively. As of  June 30, 2019, the Company did not consider any of its available-for-sale investments to be other-than-temporarily impaired.

Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported on the Condensed Consolidated Balance Sheets to the amounts reported on the Condensed Consolidated Statements of Cash Flows: 

	June 30,		December 31,
	2019		2018
Cash and cash equivalents	$	197,012	$	172,704
Restricted cash included in other long-term assets		115		114
Total cash, cash equivalents and restricted cash reported on the Condensed Consolidated Statements of Cash Flows	$	197,127	$	172,818

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.  

XML

Note 11 - Fair Value Measurements

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Fair Value Disclosures [Text Block]

11. FAIR VALUE MEASUREMENTS  

The following tables summarize the fair value measurement of the financial assets (in thousands):

	Fair Value Measurement at June 30, 2019
	Total		Level 1		Level 2		Level 3
Money market funds	$	41,820	$	41,820	$	-	$	-
Corporate debt securities		135,548		-		135,548		-
U.S. treasuries and government agency bonds		32,311		-		32,311		-
Certificates of deposit		1,600		-		1,600		-
Auction-rate securities backed by student-loan notes		3,215		-		-		3,215
Mutual funds and money market funds under deferred compensation plan		21,317		21,317		-		-
Total	$	235,811	$	63,137	$	169,459	$	3,215

	Fair Value Measurement at December 31, 2018
	Total		Level 1		Level 2		Level 3
Money market funds	$	41,135	$	41,135	$	-	$	-
Corporate debt securities		170,909		-		170,909		-
U.S. treasuries and government agency bonds		32,068		-		32,068		-
Certificates of deposit		1,600		-		1,600		-
Auction-rate securities backed by student-loan notes		3,241		-		-		3,241
Mutual funds and money market funds under deferred compensation plan		18,867		18,867		-		-
Total	$	267,820	$	60,002	$	204,577	$	3,241

● Level 1—includes instruments with quoted prices in active markets for identical assets.

● Level 2—includes instruments for which the valuations are based upon quoted market prices in active markets involving similar assets or inputs other than quoted prices that are observable for the assets. The market inputs used to value these instruments generally consist of market yields, recently executed transactions, broker/dealer quotes or alternative pricing sources with reasonable levels of price transparency. Pricing sources  may include industry standard data providers, security master files from large financial institutions, and other third-party sources used to determine a daily market value.

● Level 3—includes instruments for which the valuations are based on inputs that are unobservable and significant to the overall fair value measurement.

The Company’s level 3 assets consist of government-backed student loan auction-rate securities. The following table provides a rollforward of the fair value of the auction-rate securities (in thousands): 

Balance at January 1, 2019	$	3,241
Change in unrealized gain included in other comprehensive income		49
Sale and settlement at par		(75	)
Balance at June 30, 2019	$	3,215

The Company determined the fair value of the auction-rate securities using a discounted cash flow model with the following assumptions: 

	June 30,			December 31,
	2019			2018
Time-to-liquidity (in years)	2	-	3	2	-	3
Discount rate	4.1%	-	9.4%	4.9%	-	10.1%

XML

Note 12 - Deferred Compensation Plan

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Compensation and Employee Benefit Plans [Text Block]

12. DEFERRED COMPENSATION PLAN

The following table summarizes the deferred compensation plan balances on the Condensed Consolidated Balance Sheets (in thousands):

	June 30,		December 31,
	2019		2018
Deferred compensation plan asset components:
Cash surrender value of corporate-owned life insurance policies	$	14,644	$	13,103
Fair value of mutual funds and money market funds		21,317		18,867
Total	$	35,961	$	31,970
Deferred compensation plan assets reported in:
Other long-term assets	$	35,961	$	31,970
Deferred compensation plan liabilities reported in:
Accrued compensation and related benefits (short-term)	$	425	$	447
Other long-term liabilities		36,594		32,283
Total	$	37,019	$	32,730

XML

Note 13 - Interest and Other Income, Net

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Other Nonoperating Income and Expense [Text Block]

13. INTEREST AND OTHER INCOME, NET

The components of interest and other income, net, are as follows (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Interest income	$	1,661		$	1,563		$	3,357		$	3,024
Amortization of premium on available-for-sale securities		(95	)		(374	)		(216	)		(808	)
Gain on deferred compensation plan investments		620			419			2,555			233
Foreign currency exchange gain (loss)		73			614			(128	)		214
Other		(30	)		10			1			10
Total	$	2,229		$	2,232		$	5,569		$	2,673

XML

Note 14 - Income Taxes

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Income Tax Disclosure [Text Block]

14. INCOME TAXES

The income tax provision for interim periods is generally determined using an estimate of the Company’s annual effective tax rate and adjusted for discrete items, if any, in the relevant period. Each quarter the estimate of the annual effective tax rate is updated, and if the Company’s estimated tax rate changes, a cumulative adjustment is made.

The income tax expense for the three months ended  June 30, 2019 was $1.7 million, or 7.4% of pre-tax income. The income tax expense for the six months ended  June 30, 2019 was $0.5 million, or 1.1% of pre-tax income. The effective tax rate differed from the federal statutory rate primarily due to foreign income from the Company’s subsidiaries in Bermuda and China being taxed at lower statutory tax rates, and the benefit obtained from certain discrete items recognized in the period, including excess tax benefits from stock-based compensation. The decrease in the effective tax rate relative to the federal statutory rate was partially offset by the inclusion of the global intangible low-taxed income ("GILTI") tax.

The income tax expense for the three months ended  June 30, 2018 was $2.9 million, or 10.7% of pre-tax income. The income tax expense for the six months ended  June 30, 2018 was $3.5 million, or 7.1% of pre-tax income. The effective tax rate differed from the federal statutory rate primarily due to foreign income from the Company’s subsidiaries in Bermuda and China being taxed at lower statutory tax rates, and the benefit obtained from certain discrete items recognized in the period, including excess tax benefits from stock-based compensation. The decrease in the effective tax rate relative to the federal statutory rate was partially offset by the inclusion of the GILTI tax.

For the three and six months ended  June 30, 2019, the Company’s effective tax rate included the estimated impact of $10.1 million and $25.6 million, respectively, related to the GILTI provisions that was included as additional subpart F income, which was accounted for as a period cost. For the three and six months ended  June 30, 2018, the Company’s effective tax rate included the estimated impact of $15.5 million and $27.9 million, respectively, related to the GILTI provisions.

The Company’s 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-month period, the Company  may experience increases or decreases in its unrecognized tax benefits. However, it is not possible to determine either the magnitude or the range of increases or decreases at this time.  

In July 2015, the U.S. Tax Court issued an opinion in Altera Corp. v. Commissioner, invalidating the Treasury regulations that require participants in qualified intercompany cost-sharing arrangements to share stock-based compensation costs. A final decision was issued by the Tax Court in December 2015, and the Internal Revenue Service ("IRS") appealed the decision in June 2016. In June 2019, the U.S. Ninth Circuit Court of Appeals upheld the cost-sharing regulations.  As of June 30, 2019, it has not been determined if this ruling will be appealed. Due to the uncertainty surrounding the status of the current regulations, the Company has not recorded any adjustments as of June 30, 2019. The Company will continue to monitor and evaluate the impact of any new developments on its financial statements. 

XML

Note 15 - Accumulated Other Comprehensive Loss

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Comprehensive Income (Loss) Note [Text Block]

15. ACCUMULATED OTHER COMPREHENSIVE LOSS

The following table summarizes the changes in accumulated other comprehensive loss (in thousands):

	Unrealized Losses on Available-for-Sale Securities			Foreign Currency Translation Adjustments			Total
Balance as of January 1, 2019	$	(1,638	)	$	(3,905	)	$	(5,543	)
Other comprehensive income before reclassifications		924			3,677			4,601
Tax effect		(98	)		-			(98	)
Other comprehensive income		826			3,677			4,503
Balance as of March 31, 2019		(812	)		(228	)		(1,040	)
Other comprehensive income (loss) before reclassifications		675			(3,709	)		(3,034	)
Tax effect		(64	)		-			(64	)
Other comprehensive income (loss)		611			(3,709	)		(3,098	)
Balance as of June 30, 2019	$	(201	)	$	(3,937	)	$	(4,138	)

XML

Note 16 - Dividends and Dividend Equivalents

6 Months Ended

Jun. 30, 2019

Notes to Financial Statements

Dividends And Dividend Equivalents [Text Block]

16. DIVIDENDS AND DIVIDEND EQUIVALENTS

Cash Dividend Program

In  June 2014, the Board of Directors approved a dividend program pursuant to which the Company intends to pay quarterly cash dividends on its common stock. Based on the Company’s historical practice, stockholders of record as of the last business day of the quarter are entitled to receive the quarterly cash dividends when and if declared by the Board of Directors, which are payable to the stockholders in the following month. The Board of Directors declared the following cash dividends (in thousands, except per-share amounts):  

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Dividend declared per share	$	0.40	$	0.30	$	0.80	$	0.60
Total amount	$	17,261	$	12,686	$	34,441	$	25,330

As of June 30, 2019 and  December 31, 2018, accrued dividends totaled $17.3 million and $12.8 million, respectively.

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, and other factors that the Board of Directors  may deem relevant, as well as a determination that cash dividends are in the best interests of the stockholders.

The Company anticipates that cash used for future dividend payments will come from its current domestic cash, cash generated from ongoing U.S. operations, and cash 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 fulfill their requisite service requirement and the awards do not vest. As of  June 30, 2019 and December 31, 2018, accrued dividend equivalents totaled $10.2 million and $8.4 million, respectively.  

XML

Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2019

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-K for the year ended  December 31, 2018, filed with the SEC on  March 1, 2019.

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-Q are not necessarily indicative of the results that  may be expected for the year ending  December 31, 2019 or for any other future periods.

New Accounting Pronouncements, Policy [Policy Text Block]

Recently Adopted Accounting Pronouncement

In  February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02, Leases (Topic 842), which requires entities to recognize right-of-use (“ROU”) assets and lease liabilities on the balance sheets for leases with terms greater than 12 months. In addition, the standard applies to leases embedded in service or other arrangements. The Company adopted the standard on January 1, 2019 using the modified retrospective method and did not restate comparative periods, as permitted by the standard. In addition, the Company elected the transition practical expedients to not reassess its contracts that existed prior to January 1, 2019.

Upon adoption, the Company recognized ROU assets and lease liabilities of its outstanding operating leases on the Condensed Consolidated Balance Sheets, primarily related to real estate. The adoption did not have a material impact on the Condensed Consolidated Statements of Operations or the Condensed Consolidated Statements of Cash Flows. See Note 6 for further discussion.

Recent Accounting Pronouncements Not Yet Adopted as of June 30, 2019

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework — Changes to the Disclosure Requirements for Fair Value Measurement, which changes certain disclosure requirements, including those related to Level 3 fair value measurements. The standard will be effective for annual reporting periods beginning after December 15, 2019. Early adoption is permitted. The Company is evaluating the impact of the adoption on its disclosures.

In  January 2017, the FASB issued ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 350), which simplifies the accounting for goodwill impairment. The guidance removes step two of the goodwill impairment test, which requires a hypothetical purchase price allocation. A goodwill impairment will now be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. Entities will continue to have the option to perform a qualitative assessment to determine if a quantitative impairment test is necessary. The standard will be applied prospectively, and will be effective for annual reporting periods beginning after  December 15, 2019. Early adoption is permitted. The Company is evaluating the impact of the adoption on its annual goodwill impairment test.

In  June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326), which introduces a model based on expected losses to estimate credit losses for most financial assets and certain other instruments. In addition, for available-for-sale debt securities, entities will be required to recognize an allowance for credit losses rather than reductions in the amortized cost of the securities. The standard will be effective for annual reporting periods beginning after  December 15, 2019, with early adoption permitted for annual reporting periods beginning after  December 15, 2018. Entities will apply the standard by recording a cumulative-effect adjustment to retained earnings. The Company is evaluating the impact of the adoption on its consolidated financial position, results of operations, cash flows and disclosures.

XML

Note 3 - Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Share-based Payment Arrangement, Cost by Plan [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Cost of revenue	$	663	$	480	$	1,193	$	913
Research and development		5,412		4,194		9,841		8,188
Selling, general and administrative		16,634		11,218		27,685		21,820
Total stock-based compensation expense	$	22,709	$	15,892	$	38,719	$	30,921
Tax benefit related to stock-based compensation	$	706	$	829	$	1,544	$	1,959

Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, 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, 2019		240		$	95.38		2,174		$	61.61		2,219		$	35.69		4,633		$	50.94
Granted		44		$	140.59		440	(1)	$	103.02		-		$	-		484		$	106.41
Vested		(68	)	$	80.27		(485	)	$	55.36		(162	)	$	23.57		(715	)	$	50.52
Forfeited		(4	)	$	106.51		-		$	-		(4	)	$	68.48		(8	)	$	87.85
Outstanding at June 30, 2019		212		$	109.33		2,129		$	71.60		2,053		$	36.58		4,394		$	57.05

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

	Six Months Ended June 30,
	2019			2018
Expected term (in years)		0.5			0.5
Expected volatility		37.3	%		28.2	%
Risk-free interest rate		2.5	%		1.8	%
Dividend yield		1.2	%		1.0	%

XML

Note 4 - Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	June 30,		December 31,
	2019		2018
Raw materials	$	42,278	$	43,017
Work in process		36,390		38,674
Finished goods		64,954		54,693
Total	$	143,622	$	136,384

Schedule of Other Current Assets [Table Text Block]

	June 30,		December 31,
	2019		2018
Asset held for sale	$	7,076	$	-
RSU tax withholding proceeds receivable		4,522		39
Prepaid expense		2,913		3,425
Interest receivable		1,516		1,441
Assets for product returns		1,274		1,602
Value-added tax receivable		590		423
Prepaid wafer refund receivable		-		4,297
Other		1,754		704
Total	$	19,645	$	11,931

Schedule of Other Assets, Noncurrent [Table Text Block]

	June 30,		December 31,
	2019		2018
Deferred compensation plan assets	$	35,961	$	31,970
Operating lease ROU assets		2,688		-
Prepaid expense		2,520		2,713
Other		1,506		1,296
Total	$	42,675	$	35,979

Schedule of Accrued Liabilities [Table Text Block]

	June 30,		December 31,
	2019		2018
Dividends and dividend equivalents	$	21,554	$	15,044
Stock rotation and sales returns		4,339		5,363
Customer prepayments		3,203		2,520
Income tax payable		2,359		7,018
Warranty		1,748		4,564
Operating lease liabilities		1,097		-
Commissions		945		1,369
Other		3,371		3,084
Total	$	38,616	$	38,962

Other Noncurrent Liabilities [Table Text Block]

	June 30,		December 31,
	2019		2018
Deferred compensation plan liabilities	$	36,594	$	32,283
Dividend equivalents		5,921		6,145
Operating lease liabilities		893		-
Other		29		97
Total	$	43,437	$	38,525

XML

Note 5 - Real Estate Transaction (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Asset Acquisition, Allocation of Consideration [Table Text Block]

Building	$	30,078
Land		22,254
In-place leases		981
Total	$	53,313

XML

Note 6 - Leases (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Lease, Cost [Table Text Block]

	Three Months Ended		Six Months Ended
	June 30, 2019		June 30, 2019
Lease costs:
Operating lease costs	$	332	$	637
Short-term lease costs		84		182
Total lease costs	$	416	$	819

	Three Months Ended		Six Months Ended
	June 30, 2019		June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	423	$	727
ROU assets obtained in exchange for operating lease liabilities (1)	$	317	$	2,581

	June 30, 2019
Weighted-average remaining lease term (in years)		2.2
Weighted-average discount rate		4.2	%

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

2019 (remaining six months)	$	569
2020		954
2021		348
2022		210
2023		57
Total remaining lease payments		2,138
Less: imputed interest		(148	)
Total lease liabilities	$	1,990
Reported as:
Current liabilities	$	1,097
Long-term liabilities	$	893

Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block]

2019 (remaining six months)	$	703
2020		1,105
2021		880
2022		427
2023		91
2024		12
Total income related to lease payments	$	3,218

XML

Note 7 - Net Income Per Share (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Numerator:
Net income	$	20,693	$	24,206	$	46,874	$	46,062
Denominator:
Weighted-average outstanding shares used to compute basic net income per share		43,109		42,237		42,929		42,079
Effect of dilutive securities		2,374		2,163		2,429		2,262
Weighted-average outstanding shares used to compute diluted net income per share		45,483		44,400		45,358		44,341
Net income per share:
Basic	$	0.48	$	0.57	$	1.09	$	1.09
Diluted	$	0.45	$	0.55	$	1.03	$	1.04

XML

Note 8 - Segment and Geographic Information (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

	Revenue												Accounts Receivable
	Three Months Ended June 30,						Six Months Ended June 30,						June 30,			December 31,
Customer	2019			2018			2019			2018			2019			2018
Company A (distributor)		22	%		20	%		22	%		20	%		21	%		25	%
Company B (distributor)		*			10	%		*			10	%		12	%		16	%
Company A (direct)		13	%		*			10	%		*			16	%		*

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
Country or Region	2019		2018		2019		2018
China	$	94,837	$	81,207	$	171,035	$	154,072
Taiwan		16,018		18,150		37,365		34,541
Europe		13,040		12,651		26,024		24,116
Korea		9,623		8,853		19,234		18,640
Southeast Asia		7,122		7,977		15,794		17,002
Japan		6,292		6,486		12,934		12,100
United States		4,013		4,274		9,819		8,029
Other		62		163		165		411
Total	$	151,007	$	139,761	$	292,370	$	268,911

Revenue from External Customers by Products and Services [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
Product Family	2019		2018		2019		2018
DC to DC	$	139,691	$	127,496	$	272,402	$	246,765
Lighting Control		11,316		12,265		19,968		22,146
Total	$	151,007	$	139,761	$	292,370	$	268,911

Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]

	June 30,		December 31,
Country	2019		2018
China	$	101,872	$	93,096
United States		94,296		39,054
Taiwan		16,795		16,972
Other		867		879
Total	$	213,830	$	150,001

XML

Note 9 - Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Balance at beginning of period	$	2,045		$	3,740		$	4,564		$	2,416
Warranty provision for product sales		311			335			579			1,814
Settlements made		(28	)		(9	)		(2,299	)		(64	)
Unused warranty provision		(580	)		(115	)		(1,096	)		(215	)
Balance at end of period	$	1,748		$	3,951		$	1,748		$	3,951

XML

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

	June 30,		December 31,
	2019		2018
Cash, cash equivalents and investments:
Cash	$	155,192	$	131,569
Money market funds		41,820		41,135
Corporate debt securities		135,548		170,909
U.S. treasuries and government agency bonds		32,311		32,068
Certificates of deposit		1,600		1,600
Auction-rate securities backed by student-loan notes		3,215		3,241
Total	$	369,686	$	380,522

	June 30,		December 31,
	2019		2018
Reported as:
Cash and cash equivalents	$	197,012	$	172,704
Short-term investments		169,459		204,577
Long-term investments		3,215		3,241
Total	$	369,686	$	380,522

Investments Classified by Contractual Maturity Date [Table Text Block]

	June 30,		December 31,
	2019		2018
Due in less than 1 year	$	123,930	$	125,845
Due in 1 - 5 years		45,529		78,732
Due in greater than 5 years		3,215		3,241
Total	$	172,674	$	207,818

Unrealized Gain (Loss) on Investments [Table Text Block]

	June 30, 2019
	Amortized Cost		Unrealized Gains		Unrealized Losses			Total Fair Value		Fair Value of Investments in Unrealized Loss Position
Money market funds	$	41,820	$	-	$	-		$	41,820	$	-
Corporate debt securities		135,520		224		(196	)		135,548		67,113
U.S. treasuries and government agency bonds		32,307		20		(16	)		32,311		15,723
Certificates of deposit		1,600		-		-			1,600		-
Auction-rate securities backed by student-loan notes		3,495		-		(280	)		3,215		3,215
Total	$	214,742	$	244	$	(492	)	$	214,494	$	86,051

	December 31, 2018
	Amortized Cost		Unrealized Gains		Unrealized Losses			Total Fair Value		Fair Value of Investments in Unrealized Loss Position
Money market funds	$	41,135	$	-	$	-		$	41,135	$	-
Corporate debt securities		172,288		7		(1,386	)		170,909		166,204
U.S. treasuries and government agency bonds		32,207		2		(141	)		32,068		28,507
Certificates of deposit		1,600		-		-			1,600		-
Auction-rate securities backed by student-loan notes		3,570		-		(329	)		3,241		3,241
Total	$	250,800	$	9	$	(1,856	)	$	248,953	$	197,952

Restrictions on Cash and Cash Equivalents [Table Text Block]

	June 30,		December 31,
	2019		2018
Cash and cash equivalents	$	197,012	$	172,704
Restricted cash included in other long-term assets		115		114
Total cash, cash equivalents and restricted cash reported on the Condensed Consolidated Statements of Cash Flows	$	197,127	$	172,818

XML

Note 11 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Fair Value Measurement at June 30, 2019
	Total		Level 1		Level 2		Level 3
Money market funds	$	41,820	$	41,820	$	-	$	-
Corporate debt securities		135,548		-		135,548		-
U.S. treasuries and government agency bonds		32,311		-		32,311		-
Certificates of deposit		1,600		-		1,600		-
Auction-rate securities backed by student-loan notes		3,215		-		-		3,215
Mutual funds and money market funds under deferred compensation plan		21,317		21,317		-		-
Total	$	235,811	$	63,137	$	169,459	$	3,215

	Fair Value Measurement at December 31, 2018
	Total		Level 1		Level 2		Level 3
Money market funds	$	41,135	$	41,135	$	-	$	-
Corporate debt securities		170,909		-		170,909		-
U.S. treasuries and government agency bonds		32,068		-		32,068		-
Certificates of deposit		1,600		-		1,600		-
Auction-rate securities backed by student-loan notes		3,241		-		-		3,241
Mutual funds and money market funds under deferred compensation plan		18,867		18,867		-		-
Total	$	267,820	$	60,002	$	204,577	$	3,241

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Balance at January 1, 2019	$	3,241
Change in unrealized gain included in other comprehensive income		49
Sale and settlement at par		(75	)
Balance at June 30, 2019	$	3,215

Schedule Of Level 3 Assumptions [Table Text Block]

	June 30,			December 31,
	2019			2018
Time-to-liquidity (in years)	2	-	3	2	-	3
Discount rate	4.1%	-	9.4%	4.9%	-	10.1%

XML

Note 12 - Deferred Compensation Plan (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits by Title of Individual and Type of Deferred Compensation [Table Text Block]

	June 30,		December 31,
	2019		2018
Deferred compensation plan asset components:
Cash surrender value of corporate-owned life insurance policies	$	14,644	$	13,103
Fair value of mutual funds and money market funds		21,317		18,867
Total	$	35,961	$	31,970
Deferred compensation plan assets reported in:
Other long-term assets	$	35,961	$	31,970
Deferred compensation plan liabilities reported in:
Accrued compensation and related benefits (short-term)	$	425	$	447
Other long-term liabilities		36,594		32,283
Total	$	37,019	$	32,730

XML

Note 13 - Interest and Other Income, Net (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Schedule of Other Nonoperating Income (Expense) [Table Text Block]

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Interest income	$	1,661		$	1,563		$	3,357		$	3,024
Amortization of premium on available-for-sale securities		(95	)		(374	)		(216	)		(808	)
Gain on deferred compensation plan investments		620			419			2,555			233
Foreign currency exchange gain (loss)		73			614			(128	)		214
Other		(30	)		10			1			10
Total	$	2,229		$	2,232		$	5,569		$	2,673

XML

Note 15 - Accumulated Other Comprehensive Loss (Tables)

6 Months Ended

Jun. 30, 2019

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, 2019	$	(1,638	)	$	(3,905	)	$	(5,543	)
Other comprehensive income before reclassifications		924			3,677			4,601
Tax effect		(98	)		-			(98	)
Other comprehensive income		826			3,677			4,503
Balance as of March 31, 2019		(812	)		(228	)		(1,040	)
Other comprehensive income (loss) before reclassifications		675			(3,709	)		(3,034	)
Tax effect		(64	)		-			(64	)
Other comprehensive income (loss)		611			(3,709	)		(3,098	)
Balance as of June 30, 2019	$	(201	)	$	(3,937	)	$	(4,138	)

XML

Note 16 - Dividends and Dividend Equivalents (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

Dividends Declared [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Dividend declared per share	$	0.40	$	0.30	$	0.80	$	0.60
Total amount	$	17,261	$	12,686	$	34,441	$	25,330

XML

Note 2 - Revenue Recognition (Details Textual) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Lapse Period for Consignment			60 days
Accounts Receivable, after Allowance for Credit Loss, Current, Total	$ 55,398,000		$ 55,398,000		$ 55,214,000
Accounts Receivable, Allowance for Credit Loss, Writeoff			0		0
Contract with Customer, Liability, Current	3,203,000		$ 3,203,000		$ 2,520,000
Revenue, Performance Obligation, Performance Period Following Prepayment			14 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			$ 2,500,000
Certain Customers in China [Member] | Accrued Liabilities, Current [Member]
Contract with Customer, Liability, Current	$ 3,200,000		$ 3,200,000		$ 2,500,000
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Distributor Sales [Member]
Concentration Risk, Percentage	77.00%	86.00%	80.00%	87.00%
Product [Member]
Percentage of Revenue	99.00%	98.00%	99.00%	97.00%

XML

Note 3 - Stock-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended			6 Months Ended
		Feb. 28, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Nov. 13, 2014
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Excluding Option Exercised						$ 12,471	$ 8,709
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	[1]					484,000
Proceeds from Stock Plans						$ 1,627	1,562
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested			$ 26,300		$ 15,600	84,000	65,200
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding			$ 551,200			$ 551,200
Share Price			$ 135.78			$ 135.78
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 136,500			$ 136,500
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition						3 years 6 months
Performance-based RSUs (PSUs) [Member]
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Excluding Option Exercised						$ 12,500	$ 8,700
Time-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	[1]					44,000
Time-Based RSUs [Member] | Non-executive Employees and Non-employer Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period						44,000
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 2019 [Member] | Executive Officer [Member]
Share Price		$ 130.67
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		151,000
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		$ 46,600
Share-based Compensation Arrangement by Share-based Payment Award, Price Per Share Payable Upon Vesting of Equity Instruments Other than Options		$ 30
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term		2 years 7 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate		29.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate		2.50%
PSU 2019 [Member] | Executive Officer [Member] | Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		50.00%
PSU 2019 [Member] | Executive Officer [Member] | Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		2 years
The2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized								5,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant			1,600,000			1,600,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant			4,500,000			4,500,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 100			$ 100
Stock Issued During Period, Shares, Employee Stock Purchase Plans			0		0	14,000	18,000
Employee Stock Purchase Plan Shares Issued, Intrinsic Value						$ 300	$ 500
Proceeds from Stock Plans						$ 1,600	$ 1,600

[1] Amount reflects the number of PSUs that may ultimately be earned based on management’s probability assessment of the achievement of performance conditions at each reporting period.

XML

Note 3 - Stock-based Compensation - Stock-based Compensation Plan Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share based compensation expense	$ 22,709	$ 15,892	$ 38,719	$ 30,921
Tax benefit related to stock-based compensation	706	829	1,544	1,959
Cost of Sales [Member]
Share based compensation expense	663	480	1,193	913
Research and Development Expense [Member]
Share based compensation expense	5,412	4,194	9,841	8,188
Selling, General and Administrative Expenses [Member]
Share based compensation expense	$ 16,634	$ 11,218	$ 27,685	$ 21,820

XML

Note 3 - Stock-based Compensation - RSU Summary (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2019 $ / shares shares
Beginning balance (in shares) | shares	4,633
Weighted-Average Grant Date Fair Value Per Share, beginning balance (in dollars per share) | $ / shares	$ 50.94
Granted (in shares) | shares	484	[1]
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share) | $ / shares	$ 106.41
Vested (in shares) | shares	(715)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share) | $ / shares	$ 50.52
Forfeited (in shares) | shares	(8)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share) | $ / shares	$ 87.85
Ending balance (in shares) | shares	4,394
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share) | $ / shares	$ 57.05
Time-Based RSUs [Member]
Beginning balance (in shares) | shares	240
Weighted-Average Grant Date Fair Value Per Share, beginning balance (in dollars per share) | $ / shares	$ 95.38
Granted (in shares) | shares	44	[1]
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share) | $ / shares	$ 140.59
Vested (in shares) | shares	(68)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share) | $ / shares	$ 80.27
Forfeited (in shares) | shares	(4)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share) | $ / shares	$ 106.51
Ending balance (in shares) | shares	212
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share) | $ / shares	$ 109.33
PSUs and MPSUs [Member]
Beginning balance (in shares) | shares	2,174
Weighted-Average Grant Date Fair Value Per Share, beginning balance (in dollars per share) | $ / shares	$ 61.61
Granted (in shares) | shares	440	[1]
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share) | $ / shares	$ 103.02
Vested (in shares) | shares	(485)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share) | $ / shares	$ 55.36
Forfeited (in shares) | shares	0
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share) | $ / shares	$ 0
Ending balance (in shares) | shares	2,129
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share) | $ / shares	$ 71.60
MSUs [Member]
Beginning balance (in shares) | shares	2,219
Weighted-Average Grant Date Fair Value Per Share, beginning balance (in dollars per share) | $ / shares	$ 35.69
Granted (in shares) | shares	0	[1]
Weighted-Average Grant Date Fair Value Per Share, granted (in dollars per share) | $ / shares	$ 0
Vested (in shares) | shares	(162)
Weighted-Average Grant Date Fair Value Per Share, vested (in dollars per share) | $ / shares	$ 23.57
Forfeited (in shares) | shares	(4)
Weighted-Average Grant Date Fair Value Per Share, forfeited (in dollars per share) | $ / shares	$ 68.48
Ending balance (in shares) | shares	2,053
Weighted-Average Grant Date Fair Value Per Share, ending balance (in dollars per share) | $ / shares	$ 36.58

[1] Amount reflects the number of PSUs that may ultimately be earned based on management’s probability assessment of the achievement of performance conditions at each reporting period.

XML

Note 3 - Stock-based Compensation - Valuation Assumptions (Details) - 2004 Employee Stock Plan [Member] - Employee Stock Purchase Plan [Member]	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Expected term (in years) (Year)	6 months	6 months
Expected volatility	37.30%	28.20%
Risk-free interest rate	2.50%	1.80%
Dividend yield	1.20%	1.00%

XML

Note 4 - Balance Sheet Components - Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Raw materials	$ 42,278	$ 43,017
Work in process	36,390	38,674
Finished goods	64,954	54,693
Total	$ 143,622	$ 136,384

XML

Note 4 - Balance Sheet Components - Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Asset held for sale	$ 7,076	$ 0
RSU tax withholding proceeds receivable	4,522	39
Prepaid expense	2,913	3,425
Interest receivable	1,516	1,441
Assets for product returns	1,274	1,602
Value-added tax receivable	590	423
Prepaid wafer refund receivable	0	4,297
Other	1,754	704
Total	$ 19,645	$ 11,931

XML

Note 4 - Balance Sheet Components - Other Long-term Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Deferred compensation plan assets	$ 35,961	$ 31,970
Operating lease ROU assets	2,688	0
Prepaid expense	2,520	2,713
Other	1,506	1,296
Total	$ 42,675	$ 35,979

XML

Note 4 - Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Dividends and dividend equivalents	$ 21,554	$ 15,044
Stock rotation and sales returns	4,339	5,363
Customer prepayments	3,203	2,520
Income tax payable	2,359	7,018
Warranty	1,748	4,564
Operating lease liabilities	1,097	0
Commissions	945	1,369
Other	3,371	3,084
Total	$ 38,616	$ 38,962

XML

Note 4 - Balance Sheet Components - Long-term Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Deferred compensation plan liabilities	$ 36,594	$ 32,283
Dividend equivalents	5,921	6,145
Operating lease liabilities	893	0
Other	29	97
Total	$ 43,437	$ 38,525

XML

Note 5 - Real Estate Transaction (Details Textual) $ in Millions	1 Months Ended
	Mar. 31, 2019 USD ($)
Payments to Acquire Real Estate, Total	$ 52.9
Real Estate, Capitalized Transaction Costs	$ 0.4
Leases, Acquired-in-Place [Member]
Finite-Lived Intangible Asset, Useful Life	3 years 6 months
Building [Member]
Property, Plant and Equipment, Useful Life	40 years

XML

Note 5 - Real Estate Transaction - Allocation of Consideration (Details) - Property in Kirkland, Washington [Member] $ in Thousands	Jun. 30, 2019 USD ($)
Building	$ 30,078
Land	22,254
In-place leases	981
Total	$ 53,313

XML

Note 6 - Leases (Details Textual) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jan. 01, 2019	Jun. 30, 2019		Jun. 30, 2019		Mar. 31, 2019	Dec. 31, 2018
Operating Lease, Right-of-Use Asset		$ 2,688		$ 2,688			$ 0
Operating Lease, Liability, Total		1,990		1,990
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 2,200	317	[1]	2,581	[1]
Operating Lease, Lease Income, Lease Payments		$ 700		$ 900
Maximum [Member]
Lessee, Operating Lease, Term of Contract						4 years
Lessee, Operating Lease, Renewal Term		5 years		5 years
Lessor, Operating Lease, Term of Contract		5 years		5 years
Lessor, Operating Lease, Renewal Term		5 years		5 years

[1] For the six months ended June 30, 2019, the amount includes $2.2 million for operating leases existing on January 1, 2019.

XML

Note 6 - Leases - Leases Cost (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jan. 01, 2019	Jun. 30, 2019		Jun. 30, 2019
Operating lease costs		$ 332		$ 637
Short-term lease costs		84		182
Total lease costs		416		819
Operating cash flows from operating leases		423		727
ROU assets obtained in exchange for operating lease liabilities (1)	$ 2,200	$ 317	[1]	$ 2,581	[1]
Weighted-average remaining lease term (in years) (Year)		2 years 2 months 12 days		2 years 2 months 12 days
Weighted-average discount rate		4.20%		4.20%

[1] For the six months ended June 30, 2019, the amount includes $2.2 million for operating leases existing on January 1, 2019.

XML

Note 6 - Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
2019 (remaining six months)	$ 569
2020	954
2021	348
2022	210
2023	57
Total remaining lease payments	2,138
Less: imputed interest	(148)
Total lease liabilities	1,990
Current liabilities	1,097	$ 0
Long-term liabilities	$ 893	$ 0

XML

Note 6 - Leases - maturities of Income Related to Lease Payments (Details) $ in Thousands	Jun. 30, 2019 USD ($)
2019 (remaining six months)	$ 703
2020	1,105
2021	880
2022	427
2023	91
2024	12
Total income related to lease payments	$ 3,218

XML

Note 7 - Net Income Per Share - Net Income Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net income	$ 20,693	$ 24,206	$ 46,874	$ 46,062
Weighted-average shares outstanding, basic (in shares)	43,109	42,237	42,929	42,079
Effect of dilutive securities (in shares)	2,374	2,163	2,429	2,262
Weighted-average shares outstanding, diluted (in shares)	45,483	44,400	45,358	44,341
Earnings per share, basic (in dollars per share)	$ 0.48	$ 0.57	$ 1.09	$ 1.09
Earnings per share, diluted (in dollars per share)	$ 0.45	$ 0.55	$ 1.03	$ 1.04

XML

Note 8 - Segment and Geographic Information (Details Textual)	6 Months Ended
	Jun. 30, 2019
Number of Reportable Segments	1

XML

Note 8 - Segment and Geographic Information - Customers with Sales and Accounts Receivable Greater Than 10% (Details) - Customer Concentration Risk [Member]		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Revenue Benchmark [Member] | Distributor A [Member]
Concentration risk		22.00%	20.00%	22.00%	20.00%
Revenue Benchmark [Member] | Distributor B [Member]
Concentration risk	[1]		10.00%		10.00%
Revenue Benchmark [Member] | End Customer [Member]
Concentration risk		13.00%		10.00%
Accounts Receivable [Member] | Distributor A [Member]
Concentration risk				21.00%		25.00%
Accounts Receivable [Member] | Distributor B [Member]
Concentration risk	[1]			12.00%		16.00%
Accounts Receivable [Member] | End Customer [Member]
Concentration risk				16.00%

[1] Represents less than 10%.

XML

Note 8 - Segment and Geographic Information - Revenue by Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue	$ 151,007	$ 139,761	$ 292,370	$ 268,911
CHINA
Revenue	94,837	81,207	171,035	154,072
TAIWAN, PROVINCE OF CHINA
Revenue	16,018	18,150	37,365	34,541
Europe [Member]
Revenue	13,040	12,651	26,024	24,116
KOREA, REPUBLIC OF
Revenue	9,623	8,853	19,234	18,640
South East Asia [Member]
Revenue	7,122	7,977	15,794	17,002
JAPAN
Revenue	6,292	6,486	12,934	12,100
UNITED STATES
Revenue	4,013	4,274	9,819	8,029
Other Region [Member]
Revenue	$ 62	$ 163	$ 165	$ 411

XML

Note 8 - Segment and Geographic Information - Revenue by Product Family (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue	$ 151,007	$ 139,761	$ 292,370	$ 268,911
DC To DC Products [Member]
Revenue	139,691	127,496	272,402	246,765
Lighting Control Products [Member]
Revenue	$ 11,316	$ 12,265	$ 19,968	$ 22,146

XML

Note 8 - Segment and Geographic Information - Long Lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Long lived assets by region	$ 213,830	$ 150,001
CHINA
Long lived assets by region	101,872	93,096
UNITED STATES
Long lived assets by region	94,296	39,054
TAIWAN, PROVINCE OF CHINA
Long lived assets by region	16,795	16,972
Other Region [Member]
Long lived assets by region	$ 867	$ 879

XML

Note 9 - Commitments and Contingencies (Details Textual) $ in Millions	Jun. 30, 2019 USD ($)
Purchase Obligation, Total	$ 71.4

XML

Note 9 - Commitments and Contingencies - Changes in Warranty Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Balance	$ 2,045	$ 3,740	$ 4,564	$ 2,416
Warranty provision for product sales	311	335	579	1,814
Settlements made	(28)	(9)	(2,299)	(64)
Unused warranty provision	(580)	(115)	(1,096)	(215)
Balance	$ 1,748	$ 3,951	$ 1,748	$ 3,951

XML

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash (Details Textual) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 0.5	$ 1.6

XML

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash - Cash Equivalents, Short-term and Long-term Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Cash	$ 155,192	$ 131,569
Money market funds	41,820	41,135
U.S. treasuries and government agency bonds	32,311	32,068
Certificates of deposit	1,600	1,600
Total	369,686	380,522
Cash and cash equivalents	197,012	172,704
Short-term investments	169,459	204,577
Long-term investments	3,215	3,241
Corporate Debt Securities [Member]
Available-for-sale securities	135,548	170,909
Auction Rate Securities [Member]
Available-for-sale securities	$ 3,215	$ 3,241

XML

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash - Investment Maturity Classification (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Due in less than 1 year	$ 123,930	$ 125,845
Due in 1 - 5 years	45,529	78,732
Due in greater than 5 years	3,215	3,241
Total	$ 172,674	$ 207,818

XML

Note 10- Cash, Cash Equivalents, Investments and Restricted Cash - Unrealized Gains and Losses on Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Adjusted Cost	$ 214,742	$ 250,800
Unrealized Gains	244	9
Unrealized Losses	(492)	(1,856)
Total Fair Value	214,494	248,953
Fair Value of Investments in Unrealized Loss Position	86,051	197,952
Money Market Funds [Member]
Adjusted Cost	41,820	41,135
Unrealized Gains	0	0
Unrealized Losses	0	0
Total Fair Value	41,820	41,135
Fair Value of Investments in Unrealized Loss Position	0	0
Corporate Debt Securities [Member]
Adjusted Cost	135,520	172,288
Unrealized Gains	224	7
Unrealized Losses	(196)	(1,386)
Total Fair Value	135,548	170,909
Fair Value of Investments in Unrealized Loss Position	67,113	166,204
US Government Agencies Short-term Debt Securities [Member]
Adjusted Cost	32,307	32,207
Unrealized Gains	20	2
Unrealized Losses	(16)	(141)
Total Fair Value	32,311	32,068
Fair Value of Investments in Unrealized Loss Position	15,723	28,507
Certificates of Deposit [Member]
Adjusted Cost	1,600	1,600
Unrealized Gains	0	0
Unrealized Losses	0	0
Total Fair Value	1,600	1,600
Fair Value of Investments in Unrealized Loss Position	0	0
Auction Rate Securities [Member]
Adjusted Cost	3,495	3,570
Unrealized Gains	0	0
Unrealized Losses	(280)	(329)
Total Fair Value	3,215	3,241
Fair Value of Investments in Unrealized Loss Position	$ 3,215	$ 3,241

XML

Note 10 - Cash, Cash Equivalents, Investments and Restricted Cash - Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Cash and cash equivalents	$ 197,012	$ 172,704
Restricted cash included in other long-term assets	115	114
Total cash, cash equivalents and restricted cash reported on the Condensed Consolidated Statements of Cash Flows	$ 197,127	$ 172,818	$ 83,188	$ 82,874

XML

Note 11 - Fair Value Measurements - Financial Assets and Liabilities, Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Total Fair Value	$ 214,494	$ 248,953
Assets, fair value	235,811	267,820
Fair Value, Inputs, Level 1 [Member]
Assets, fair value	63,137	60,002
Fair Value, Inputs, Level 2 [Member]
Assets, fair value	169,459	204,577
Fair Value, Inputs, Level 3 [Member]
Assets, fair value	3,215	3,241
Money Market Funds [Member]
Total Fair Value	41,820	41,135
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	41,820	41,135
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	0	0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
Corporate Debt Securities [Member]
Total Fair Value	135,548	170,909
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	135,548	170,909
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
US Government Agencies Short-term Debt Securities [Member]
Total Fair Value	32,311	32,068
US Government Agencies Short-term Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
US Government Agencies Short-term Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	32,311	32,068
US Government Agencies Short-term Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
Certificates of Deposit [Member]
Total Fair Value	1,600	1,600
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	1,600	1,600
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	0	0
Auction Rate Securities [Member]
Total Fair Value	3,215	3,241
Auction Rate Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	0	0
Auction Rate Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	0	0
Auction Rate Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	3,215	3,241
Mutual Fund [Member]
Total Fair Value	21,317	18,867
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Total Fair Value	21,317	18,867
Mutual Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Total Fair Value	0	0
Mutual Fund [Member] | Fair Value, Inputs, Level 3 [Member]
Total Fair Value	$ 0	$ 0

XML

Note 11 - Fair Value Measurements - Level 3 Investments (Details) - Auction Rate Securities [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Balance, auction rate securities	$ 3,241
Change in unrealized gain included in other comprehensive income	49
Sale and settlement at par	(75)
Balance, auction rate securities	$ 3,215

XML

Note 11 - Fair Value Measurements - Discounted Cash Flow Assumptions (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Minimum [Member]
Time-to-liquidity (Year)	2 years	2 years
Discount rate	4.10%	4.90%
Maximum [Member]
Time-to-liquidity (Year)	3 years	3 years
Discount rate	9.40%	10.10%

XML

Note 12 - Deferred Compensation Plan - Summary of Deferred Compensation Plan (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Deferred compensation plan assets	$ 35,961	$ 31,970
Deferred compensation plan liabilities	37,019	32,730
Other Long-term Assets [Member]
Deferred compensation plan assets	35,961	31,970
Accrued Compensation and Related Benefits [Member]
Deferred compensation plan liabilities	425	447
Other Long-term Liabilities [Member]
Deferred compensation plan liabilities	36,594	32,283
Cash Surrender Value [Member]
Deferred compensation plan assets	14,644	13,103
Mutual Funds and Money Market Funds, Fair Value [Member]
Deferred compensation plan assets	$ 21,317	$ 18,867

XML

Note 13 - Interest and Other Income, Net - Interest and Other Income Components (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest income	$ 1,661	$ 1,563	$ 3,357	$ 3,024
Amortization of premium on available-for-sale securities	(95)	(374)	(216)	(808)
Gain on deferred compensation plan investments	620	419	2,555	233
Foreign currency exchange gain (loss)	73	614	(128)	214
Other	(30)	10	1	10
Total	$ 2,229	$ 2,232	$ 5,569	$ 2,673

XML

Note 14 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Expense (Benefit), Total	$ 1,655	$ 2,908	$ 531	$ 3,529
Effective Income Tax Rate Reconciliation, Percent, Total	7.40%	10.70%	1.10%	7.10%
GILTI Income	$ 10,100	$ 15,500	$ 25,600	$ 27,900

XML

Note 15 - Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Mar. 31, 2019
Balance	$ 680,251	$ 640,093
Balance	704,154	680,251
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance	(812)	(1,638)
Other comprehensive income before reclassifications	675	924
Tax effect	(64)	(98)
Other comprehensive income	611	826
Balance	(201)	(812)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(228)	(3,905)
Other comprehensive income before reclassifications	(3,709)	3,677
Tax effect	0	0
Other comprehensive income	(3,709)	3,677
Balance	(3,937)	(228)
AOCI Attributable to Parent [Member]
Balance	(1,040)	(5,543)
Other comprehensive income before reclassifications	(3,034)	4,601
Tax effect	(64)	(98)
Other comprehensive income	(3,098)	4,503
Balance	$ (4,138)	$ (1,040)

XML

Note 16 - Dividends and Dividend Equivalents (Details Textual) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Dividends Payable, Current	$ 17.3	$ 12.8
Accrued Dividend Equivalents	$ 10.2	$ 8.4

XML

Note 16 - Dividends and Dividend Equivalents - Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Dividend declared per share (in dollars per share)	$ 0.40	$ 0.30	$ 0.80	$ 0.60
Total amount	$ 17,261	$ 12,686	$ 34,441	$ 25,330