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 March 31, 2020

or

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

For the transition period from                      to                     

Commission File Number: 0-10961

 ____________________________________________________________________________ 

QUIDEL CORPORATION

(Exact name of registrant as specified in its charter)

  ____________________________________________________________________________

Delaware	94-2573850
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

9975 Summers Ridge Road, San Diego, California 92121

(Address of principal executive offices, including zip code)

(858) 552-1100

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $0.001 Par Value	QDEL	The NASDAQ Stock 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  ☒

As of May 1, 2020, 41,999,003 shares of the registrant’s common stock were outstanding.

INDEX

PART I—FINANCIAL INFORMATION
ITEM 1. Financial Statements (unaudited)
Consolidated Balance Sheets as of March 31, 2020 and December 31, 2019	3
Consolidated Statements of Income for the three months ended March 31, 2020 and 2019	4
Consolidated Statements of Comprehensive Income for the three months ended March 31, 2020 and 2019	5
Consolidated Statements of Stockholders’ Equity for the three months ended March 31, 2020 and 2019	6
Consolidated Statements of Cash Flows for the three months ended March 31, 2020 and 2019	7
Notes to Consolidated Financial Statements	8
ITEM 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	17
ITEM 3. Quantitative and Qualitative Disclosures About Market Risk	22
ITEM 4. Controls and Procedures	23
PART II—OTHER INFORMATION
ITEM 1. Legal Proceedings	23
ITEM 1A. Risk Factors	23
ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds	25
ITEM 3. Defaults Upon Senior Securities	25
ITEM 4. Mine Safety Disclosures	25
ITEM 5. Other Information	25
ITEM 6. Exhibits	26
Signatures	27

2

PART I    FINANCIAL INFORMATION

ITEM 1. Financial Statements

QUIDEL CORPORATION

CONSOLIDATED BALANCE SHEETS

(in thousands, except par value; unaudited)

	March 31, 2020		December 31, 2019
ASSETS
Current assets:
Cash and cash equivalents	$	108,770	$	52,775
Accounts receivable, net	102,146		94,496
Inventories	58,708		58,086
Prepaid expenses and other current assets	16,855		16,870
Total current assets	286,479		222,227
Property, plant and equipment, net	79,915		79,762
Right-of-use assets	90,490		92,119
Goodwill	337,017		337,018
Intangible assets, net	141,268		148,112
Deferred tax asset	24,424		24,502
Other non-current assets	7,173		7,127
Total assets	$	966,766	$	910,867
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	33,153	$	26,701
Accrued payroll and related expenses	14,195		17,286
Operating lease liabilities	6,523		6,412
Contingent consideration	5,936		5,969
Deferred consideration	42,000		42,000
Convertible Senior Notes	12,777		12,661
Other current liabilities	21,612		14,862
Total current liabilities	136,196		125,891
Operating lease liabilities - non-current	91,571		93,227
Deferred consideration - non-current	111,277		109,382
Contingent consideration - non-current	10,565		10,566
Other non-current liabilities	11,958		11,981
Commitments and contingencies (Note 8)
Stockholders’ equity:
Preferred stock, $0.001 par value per share; 5,000 shares authorized; none issued or outstanding at March 31, 2020 and December 31, 2019	—		—
Common stock, $0.001 par value per share; 97,500 shares authorized; 41,996 and 41,868 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	42		42
Additional paid-in capital	430,499		425,557
Accumulated other comprehensive loss	(263)		(463)
Retained earnings	174,921		134,684
Total stockholders’ equity	605,199		559,820
Total liabilities and stockholders’ equity	$	966,766	$	910,867

See accompanying notes.

3

QUIDEL CORPORATION

CONSOLIDATED STATEMENTS OF INCOME

(in thousands, except per share data; unaudited)

	Three Months Ended March 31,
	2020		2019
Total revenues	$	174,653	$	147,968
Cost of sales	59,662		57,041
Gross profit	114,991		90,927
Research and development	16,379		13,930
Sales and marketing	30,738		29,589
General and administrative	14,332		13,431
Acquisition and integration costs	1,914		2,824
Total operating expenses	63,363		59,774
Operating income	51,628		31,153
Interest and other expense, net	2,807		4,582
Income before income taxes	48,821		26,571
Provision for income taxes	8,584		1,727
Net income	$	40,237	$	24,844
Basic earnings per share	$	0.96	$	0.63
Diluted earnings per share	$	0.93	$	0.60
Shares used in basic per share calculation	42,056		39,704
Shares used in diluted per share calculation	43,403		42,907

See accompanying notes.

4

QUIDEL CORPORATION

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands; unaudited)

	Three Months Ended March 31,
	2020		2019
Net income	$	40,237	$	24,844
Other comprehensive income (loss)
Changes in cumulative translation adjustment, net of tax	(65)		(248)
Changes in unrealized gains (losses) from cash flow hedges:
Net unrealized gains on derivative instruments	406		290
Reclassification of net realized gains on derivative instruments included in net income	(141)		—
Total change in unrealized gains from cash flow hedges, net of tax	265		290
Comprehensive income	$	40,437	$	24,886

See accompanying notes.

5

QUIDEL CORPORATION

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(in thousands; unaudited)

	Common Stock
	Shares	Par		Additional paid-in capital		Accumulated other comprehensive (loss) income		Retained earnings		Total stockholders’ equity
Balance at December 31, 2019	41,868	$	42	$	425,557	$	(463)	$	134,684	$	559,820
Issuance of common stock under equity compensation plans	153	—		3,571		—		—		3,571
Stock-based compensation expense	—	—		3,325		—		—		3,325
Repurchases of common stock	(25)	—		(1,954)		—		—		(1,954)
Other comprehensive gain, net of tax	—	—		—		200		—		200
Net income	—	—		—		—		40,237		40,237
Balance at March 31, 2020	41,996	$	42	$	430,499	$	(263)	$	174,921	$	605,199

	Common Stock
	Shares	Par		Additional paid-in capital		Accumulated other comprehensive (loss) income		Retained earnings		Total stockholders’ equity
Balance at December 31, 2018	39,386	$	39	$	363,921	$	(139)	$	61,763	$	425,584
Issuance of common stock under equity compensation plans	444	1		8,816		—		—		8,817
Stock-based compensation expense	—	—		2,887		—		—		2,887
Repurchases of common stock	(24)	—		(1,476)		—		—		(1,476)
Other comprehensive gain, net of tax	—	—		—		42		—		42
Net income	—	—		—		—		24,844		24,844
Balance at March 31, 2019	39,806	$	40	$	374,148	$	(97)	$	86,607	$	460,698

6

QUIDEL CORPORATION CONSOLIDATED STATEMENTS OF CASH FLOWS (in thousands; unaudited)
	Three Months Ended March 31,
	2020		2019
OPERATING ACTIVITIES:
Net income	$	40,237	$	24,844
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and other	12,480		11,971
Stock-based compensation expense	3,878		3,588
Amortization of debt discount and deferred issuance costs	217		602
Accretion of interest on deferred consideration	1,895		2,343
Change in deferred tax assets and liabilities	78		—
Changes in assets and liabilities:
Accounts receivable	(7,737)		(10,682)
Inventories	(602)		682
Prepaid expenses and other current and non-current assets	321		3,995
Accounts payable	6,639		1,802
Accrued payroll and related expenses	(2,860)		(6,969)
Other current and non-current liabilities	6,634		721
Net cash provided by operating activities:	61,180		32,897
INVESTING ACTIVITIES:
Acquisitions of property, equipment and intangibles	(5,884)		(4,993)
Net cash used for investing activities:	(5,884)		(4,993)
FINANCING ACTIVITIES:
Proceeds from issuance of common stock	2,805		6,847
Payments on Revolving Credit Facility	—		(20,000)
Payments on finance lease obligation	(112)		(38)
Repurchases of common stock	(1,954)		(1,476)
Payments of acquisition contingent consideration	(34)		(12)
Net cash provided by (used for) financing activities:	705		(14,679)
Effect of exchange rates on cash	(6)		18
Net increase in cash and cash equivalents	55,995		13,243
Cash and cash equivalents, beginning of period	52,775		43,695
Cash and cash equivalents, end of period	$	108,770	$	56,938

SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Purchase of property, equipment and intangibles by incurring current liabilities	$	860	$	1,728
Reduction of other current liabilities upon issuance of restricted share units	$	767	$	1,970

See accompanying notes.

7

Quidel Corporation

Notes to Consolidated Financial Statements

(Unaudited)

Note 1. Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited consolidated financial statements of Quidel Corporation and its subsidiaries (the “Company”) have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation (consisting of normal recurring accruals) have been included.

The information at March 31, 2020, and for the three months ended March 31, 2020 and 2019, is unaudited. For further information, refer to the Company’s consolidated financial statements and notes thereto for the year ended December 31, 2019 included in the Company’s 2019 Annual Report on Form 10-K. Operating results for any quarter are historically seasonal in nature and are not necessarily indicative of the results expected for the full year.

For 2020 and 2019, the Company’s fiscal year will end or has ended on January 3, 2021 and December 29, 2019, respectively. For 2020 and 2019, the Company’s first quarter ended on March 29, 2020 and March 31, 2019, respectively. For ease of reference, the calendar quarter end dates are used herein. The three-month periods ended March 31, 2020 and 2019 each included 13 weeks.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Significant Accounting Policies

During the three months ended March 31, 2020, there have been no changes to our significant accounting policies as described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2019.

Note 2. Computation of Earnings Per Share

Basic earnings per share (“EPS”) is computed by dividing net income by the weighted-average number of common shares outstanding, including restricted stock units (“RSUs”) vested during the period. Diluted EPS is computed based on the sum of the weighted average number of common shares and potentially dilutive common shares outstanding during the period. Potentially dilutive common shares consist of shares issuable from stock options, unvested RSUs and the 3.25% Convertible Senior Notes due 2020 (“Convertible Senior Notes”). Potentially dilutive common shares from outstanding stock options and unvested RSUs are determined using the average share price for each period under the treasury stock method. Potentially dilutive shares from the Convertible Senior Notes are determined using the if-converted method. Under the provisions of the if-converted method, the Convertible Senior Notes are assumed to be converted and included in the denominator of the EPS calculation and the interest expense, net of tax, recorded in connection with the Convertible Senior Notes is added back to net income.

The Convertible Senior Notes have a dilutive impact when the average market price of the Company’s common stock exceeds the applicable conversion price of the notes. The Senior Convertible Notes became convertible on March 31, 2018 and remained convertible through March 31, 2020.

8

The following table reconciles net income and the weighted-average shares used in computing basic and diluted earnings per share (in thousands):

	Three Months Ended March 31,
	2020		2019
Numerator:
Net income used for basic earnings per share	$	40,237	$	24,844
Interest expense on Convertible Senior Notes, net of tax	181		791
Net income used for diluted earnings per share, if-converted method	$	40,418	$	25,635
Basic weighted-average common shares outstanding	42,056		39,704
Dilutive potential shares issuable from Convertible Senior Notes	410		1,825
Dilutive potential shares issuable from stock options and unvested RSUs	937		1,378
Diluted weighted-average common shares outstanding, if-converted	43,403		42,907
Potentially dilutive shares excluded from calculation due to anti-dilutive effect	97		149

Potentially dilutive shares excluded from the calculation above represent stock options when the combined exercise price and unrecognized stock-based compensation are greater than the average market price for the Company’s common stock because their effect is anti-dilutive.  

Note 3. Balance Sheet Account Details 

Inventories

Inventories are stated at the lower of cost (first-in, first-out) or net realizable value. Inventories consisted of the following (in thousands):

	March 31, 2020		December 31, 2019
Raw materials	$	22,508	$	23,294
Work-in-process (materials, labor and overhead)	19,662		20,514
Finished goods (materials, labor and overhead)	16,538		14,278
Total inventories	$	58,708	$	58,086

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following (in thousands):

	March 31, 2020		December 31, 2019
Other receivables	$	8,645	$	7,857
Prepaid expenses	5,952		4,568
Income taxes receivable	—		2,560
Other	2,258		1,885
Total prepaid expenses and other current assets	$	16,855	$	16,870

9

Other Current Liabilities

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

	March 31, 2020		December 31, 2019
Customer incentives	$	8,848	$	7,369
Income and other taxes payable	6,783		1,214
Customer deposits	79		1,500
Other	5,902		4,779
Total other current liabilities	$	21,612	$	14,862

Note 4. Income Taxes

The Company calculates its interim income tax provision in accordance with Accounting Standards Codification (“ASC”) 270, Interim Reporting, and ASC 740, Accounting for Income Taxes (together, “ASC 740”). At the end of each interim period, the Company estimates its annual effective tax rate and applies that rate to its ordinary quarterly earnings to calculate the tax related to ordinary income. The tax effects for other items that are excluded from ordinary income are discretely calculated and recognized in the period in which they occur.

The Company recognized income tax provisions of $8.6 million and $1.7 million for the three months ended March 31, 2020 and 2019, respectively. The Company’s 18% effective tax rate for the three months ended March 31, 2020 and 6% effective tax rate for the three months ended March 31, 2019 differed from the federal statutory rate of 21% primarily due to the discrete impact of excess tax deductions from stock-based compensation, the benefit from research and development (“R&D”) credits and the benefit from corporate deductions attributable to Foreign Derived Intangible Income (“FDII”).

The Company is subject to periodic audits by domestic and foreign tax authorities. Due to the carryforward of unutilized credits, the Company’s federal tax years from 2009 and forward are subject to examination by the U.S. authorities. The Company’s state and foreign tax years for 2001 and forward are subject to examination by applicable tax authorities. The Company believes that it has appropriate support for the income tax positions taken on its tax returns and that its accruals for tax liabilities are adequate for all open years based on an assessment of many factors, including past experience and interpretations of tax laws applied to the facts of each matter.

The Coronavirus Aid, Relief, and Economic Security Act (CARES Act) was enacted on March 27, 2020. The CARES Act includes, among other things, refundable payroll tax credits, deferment of employer side social security payments and technical amendments regarding the income tax depreciation of qualified improvement property placed in service after December 31, 2017. These amendments allow for retroactive accelerated income tax depreciation on certain of our leasehold improvement assets. We are currently assessing the impact of these provisions to our financial statements.

Note 5. Debt

Convertible Senior Notes

In December 2014, the Company issued $172.5 million aggregate principal amount of its 3.25% Convertible Senior Notes. Debt issuance costs of approximately $5.1 million were primarily comprised of underwriters fees, legal, accounting and other professional fees, of which $4.2 million were recorded as a reduction to long-term debt and are being amortized using the effective interest method to interest expense over the six-year term of the Convertible Senior Notes. The remaining $0.9 million of debt issuance costs were allocated as a component of equity in additional paid-in capital. The implied interest rate of the Convertible Senior Notes was 6.9%, assuming no conversion option. The Convertible Senior Notes mature on December 15, 2020.

The Convertible Senior Notes are convertible into cash, shares of common stock, or a combination of cash and shares of common stock based on an initial conversion rate, subject to adjustment, of 31.1891 shares per $1,000 principal amount of the Convertible Senior Notes (which represents an initial conversion price of approximately 32.06 per share) in the following circumstances and to the following extent: (1) during any calendar quarter commencing after the calendar quarter ending on March 31, 2015, if the last reported sales price of the Company’s common stock, for at least 20 trading days (whether or not consecutive) in the period of 30 consecutive trading days ending on the last trading day of the calendar quarter immediately preceding the calendar quarter in which the conversion occurs, is more than 130% of the conversion price of the notes in effect

10

on each applicable trading day; (2) during the five consecutive business day period following any five consecutive trading day period in which the trading price per $1,000 principal amount of the Convertible Senior Notes for each such trading day was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such day; or (3) upon the occurrence of specified events described in the indenture for the Convertible Senior Notes. On or after September 15, 2020 until the close of business on the second scheduled trading day immediately preceding the stated maturity date, holders may surrender their notes for conversion at any time, regardless of the foregoing circumstances. If a fundamental change, as defined in the indenture for the Convertible Senior Notes, such as an acquisition, merger or liquidation of the Company, occurs prior to the maturity date, subject to certain limitations, holders of the Convertible Senior Notes may require the Company to repurchase all or a portion of their Convertible Senior Notes for cash at a repurchase price equal to 100% of the principal amount of the Convertible Senior Notes to be repurchased, plus any accrued and unpaid interest to, but excluding, the repurchase date.

During the first quarter of 2020, the last reported sales price of the Company’s common stock was greater than 130% of the Convertible Senior Notes conversion price for 20 or more of the 30 consecutive trading days preceding the quarter-end. Consequently, the Convertible Senior Notes were convertible as of March 31, 2020. If the Convertible Senior Notes were converted as of March 31, 2020, the if-converted amount would exceed the principal by $0.6 million. The Convertible Senior Notes may be settled at the Company’s option in cash or a combination of cash and shares of common stock.

The Company pays 3.25% interest per annum on the principal amount of the Convertible Senior Notes semi-annually in arrears in cash on June 15 and December 15 of each year. During the three months ended March 31, 2020, the Company recorded total interest expense of $0.2 million related to the Convertible Senior Notes, of which $0.1 million related to the amortization of the debt discount and issuance costs and $0.1 million related to the coupon due semi-annually. During the three months ended March 31, 2019, the Company recorded total interest expense of $1.0 million related to the Convertible Senior Notes of which $0.5 million related to the amortization of the debt discount and issuance costs and $0.5 million related to the coupon due semi-annually. 

The following table summarizes information about the equity and liability components of the Convertible Senior Notes (dollars in thousands). The fair values of the respective notes outstanding were measured based on quoted market price and is a Level 2 measurement.

	March 31, 2020		December 31, 2019
Principal amount outstanding	$	13,131	$	13,131
Unamortized discount of liability component	(312)		(415)
Unamortized debt issuance costs	(42)		(55)
Net carrying amount of liability component	$	12,777	$	12,661
Carrying value of equity component, net of issuance costs	$	2,265	$	2,265
Fair value of outstanding Convertible Senior Notes	$	38,633	$	30,991
Remaining amortization period of discount on the liability component	0.8 years		1.0 year

Credit Agreement

On August 31, 2018, the Company entered into an Amended and Restated Credit Agreement (the “Credit Agreement”) which provides the Company with a $175.0 million Revolving Credit Facility. There is no balance outstanding as of March 31, 2020. The Credit Agreement has a term of five years and matures on August 31, 2023.

Loans will bear interest at a rate equal to (i) the London Interbank Offered Rate (“LIBOR”) plus the “applicable rate” or (ii) the “base rate” (defined as the highest of (a) the Bank of America prime rate, (b) the Federal Funds rate plus one-half of one percent and (c) LIBOR plus one percent) plus the “applicable rate.” The initial applicable rate was 1.00% per annum for base rate loans and 2.00% per annum for LIBOR rate loans, and thereafter will be determined in accordance with a pricing grid based on the Company’s Consolidated Leverage Ratio (as defined in the Credit Agreement) ranging from 1.75% to 2.50% per annum for LIBOR rate loans and from 0.75% to 1.50% per annum for base rate loans. In addition, the Company pays a commitment fee on the unused portion of the Credit Agreement based on the Company’s Consolidated Leverage Ratio ranging from 0.15% to 0.30% per annum.

The Credit Agreement is guaranteed by certain material domestic subsidiaries of the Company (the “Guarantors”) and is secured by liens on substantially all of the assets of the Company and the Guarantors, excluding real property and certain other types of excluded assets, and contains affirmative and negative covenants that are customary for credit agreements of this

11

nature. The negative covenants include, among other things, limitations on asset sales, mergers, indebtedness, liens, dividends and other distributions, investments and transactions with affiliates. The Credit Agreement contains two financial covenants: (i) maximum Consolidated Leverage Ratio (as defined in the Credit Agreement) as of the last day of each fiscal quarter of 3.50 to 1.00, which ratio may be increased to 4.50 to 1.00 in case of certain qualifying acquisitions; and (ii) a minimum Consolidated Fixed Charge Coverage Ratio (as defined in the Credit Agreement) of 1.25 to 1.00 as of the end of any fiscal quarter for the most recently completed four fiscal quarters. The Company was in compliance with all financial covenants as of March 31, 2020. 

Interest expense recognized under the Credit Agreement, including amortization of deferred issuance cost, was $0.2 million for the three months ended March 31, 2020 and $0.6 million for the three months ended March 31, 2019.

Note 6. Stockholders’ Equity

Issuances of Common Stock

A summary of the status of stock option activity for the three months ended March 31, 2020 is as follows (in thousands, except price data):

	Shares	Weighted-average exercise price per share
Outstanding at December 31, 2019	944	$	30.63
Granted	121	77.16
Exercised	(65)	21.26
Forfeited	(12)	43.34
Outstanding at March 31, 2020	988	$	36.77

A summary of the status of restricted stock unit activity for the three months ended March 31, 2020 is as follows (in thousands, except price data):

	Shares	Weighted-average grant date fair value
Non-vested December 31, 2019	786	$	41.88
Granted	186	77.53
Vested	(60)	18.21
Forfeited	(17)	49.85
Non-vested at March 31, 2020	895	$	50.74

During the three months ended March 31, 2020, the Company issued 27,826 shares of common stock in connection with the Company’s employee stock purchase plan (the “ESPP”).

Stock-Based Compensation

The expense related to the Company’s stock-based compensation plans included in the accompanying Consolidated Statements of Income was as follows (in thousands):

	Three Months Ended March 31,
	2020		2019
Cost of sales	$	258	$	280
Research and development	642		565
Sales and marketing	1,297		1,119
General and administrative	1,681		1,624
Total stock-based compensation expense	$	3,878	$	3,588

As of March 31, 2020, total unrecognized compensation expense was $35.7 million, which is expected to be recognized over a weighted-average period of approximately 2.8 years.

12

The estimated fair value of each stock option was determined on the date of grant using the Black-Scholes option valuation model with the following weighted-average assumptions for the option grants.

	Three Months Ended March 31,
	2020			2019
Risk-free interest rate	1.35		%	2.51		%
Expected option life (in years)	5.14			5.68
Volatility rate	39		%	39		%
Dividend rate	0		%	0		%
Weighted-average grant date fair value	$	28.24		$	23.67

The fair value of RSUs is determined based on the closing market price of the Company’s common stock on the grant date. The weighted-average fair value of RSUs granted during the three months ended March 31, 2020 and 2019 was $77.53 and $59.45, respectively.

Compensation expense capitalized to inventory and compensation expense related to the Company’s ESPP were not material for the three months ended March 31, 2020 or 2019.

Note 7. Industry and Geographic Information

The Company operates in one reportable segment. Sales to customers outside the U.S. represented $41.2 million (24%) and $41.5 million (28%) of total revenue for the three months ended March 31, 2020 and 2019, respectively. As of March 31, 2020 and December 31, 2019, accounts receivable due from foreign customers were $24.1 million and $23.0 million, respectively.

The Company had sales to individual customers in excess of 10% of total revenues, as follows:

	Three Months Ended March 31,
	2020		2019
Customer:
A	21	%	17	%
B	19	%	17	%
C	10	%	7	%
D	10	%	13	%
Total:	60	%	54	%

As of March 31, 2020 and December 31, 2019, accounts receivable from customers with balances due in excess of 10% of total accounts receivable totaled $73.9 million and $67.4 million, respectively.

Consolidated total revenues by product category for the three months ended March 31, 2020 and 2019 were as follows (in thousands):

	Three Months Ended March 31,
	2020		2019
Rapid Immunoassay	$	95,930	$	62,494
Cardiometabolic Immunoassay	53,901		65,872
Specialized Diagnostic Solutions	16,459		13,854
Molecular Diagnostic Solutions	8,363		5,748
Total revenues	$	174,653	$	147,968

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Note 8. Commitments and Contingencies

Leases

We lease administrative, research and development, sales and marketing and manufacturing facilities and certain equipment under various non-cancelable lease agreements. Facility leases generally provide for periodic rent increases, and may contain clauses for rent escalation, renewal options or early termination.

Summers Ridge Lease — The Company leases three of the four buildings that are located on the Summers Ridge Property in San Diego, California with an initial term through January 2033 with options to extend the lease for two additional five-year terms upon satisfaction of certain conditions, which have not been included in the determination of the lease term. The lease is subject to must-take provisions related to one additional building, which will have the same lease term as the three buildings originally leased. The remaining building is subject to the expiration of the lease with its current tenant for which the expiration date is not yet known.

As a result of the relocation of the Company’s headquarters to the Summers Ridge Property, the Company entered into a sublease of its former headquarters building in January 2020, with minimum rent of $2.4 million under the sublease agreement. Lease income for the three months ended March 31, 2020 was $0.1 million.

McKellar Court Lease — In 1999, the Company completed a sale and leaseback transaction of its San Diego facility at McKellar Court to a partnership for which the Company is a 25% limited partner. The partnership is deemed to be a variable interest entity (VIE). The Company is not, however, the primary beneficiary of the VIE as it does not have the power to direct the activities of the partnership and does not have the obligation to absorb losses or receive benefits of the partnership that could potentially be significant to the partnership. The McKellar Court lease ends in December 2020 and contains options to extend the lease for three additional five-year periods, of which one five-year period is included in the determination of the lease term.

Litigation and Other Legal Proceedings

In Beckman Coulter Inc. v. Quidel Corporation, which was filed in the Superior Court for the County of San Diego, California, on November 27, 2017, Beckman Coulter (“Beckman”) alleges that a provision of an agreement between Quidel and Beckman violates state antitrust laws. Our acquisition of the B-type Naturietic Peptide assay business (“BNP Business”) consisted of assets and liabilities relating to a contractual arrangement with Beckman (the “Beckman Agreement”) for the supply of antibodies and other inputs related to, and distribution of, the Triage® BNP Test for the Beckman Coulter Access Family of Immunoassay Systems. The Beckman Agreement further provides that Beckman, for a specified period, cannot research, develop, manufacture or sell an assay for use in the diagnosis of cardiac diseases that measures or detects the presence or absence of BNP or NT-pro-BNP (a related biomarker) (the “Exclusivity Provision”). In the lawsuit, Beckman asserts that this provision violates certain state antitrust laws and is unenforceable. Beckman contends that it has suffered damages due to this provision and seeks a declaration that this provision is void.

On December 7, 2018, the trial court granted a motion by Beckman for summary adjudication, holding that the Exclusivity Provision is void under California law (the “December 7 Order”). On December 18, 2018, the trial court stayed the effect of the December 7 Order pending a decision on a writ petition Quidel intended to file with the Court of Appeal. Quidel filed its writ petition on January 18, 2019, asking the Court of Appeal to review and reverse the December 7 Order. On February 7, 2019, the trial court stayed all the remaining litigation pending the outcome of the writ petition and vacated all deadlines in the case.

On March 14, 2019, the Court of Appeal issued an order to show cause why the relief sought in Quidel’s petition should not be granted. The Court also stayed the December 7 Order pending a further order from the Court of Appeal. On August 29, 2019, the Court of Appeal issued a written decision ruling in Quidel’s favor and overturning the December 7 Order. Beckman challenged the Court of Appeal’s ruling with a petition for rehearing on September 10, 2019, which was denied on September 13, 2019.

On October 1, 2019, Beckman filed a petition for review of the Court of Appeal’s ruling with the Supreme Court of California (the “Supreme Court”). We subsequently filed an answer to Beckman’s petition, Beckman filed a response to our reply and on November 13, 2019, the Supreme Court granted review of the Court of Appeal ruling, with further action in this matter being deferred pending consideration and disposition of a related issue in Ixchel Pharma v. Biogen, or pending further order of the Supreme Court.

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On November 22, 2019, the trial court continued the stay at the trial court level and scheduled a status conference for December 11, 2020.

Quidel denies that the Exclusivity Provision is unlawful, denies any liability with respect to this matter, and intends to vigorously defend itself. There are multiple factors that prevent us from being able to estimate the amount of loss, if any, that may result from this matter including: (1) we are vigorously defending ourselves and believe that we have a number of meritorious legal defenses; (2) there are unresolved questions of law and fact that could be important to the ultimate resolution of this matter, some of which are subject to review by the Supreme Court; and (3) discovery is ongoing. Accordingly, at this time, we are not able to estimate a possible loss or range of loss that may result from this matter or to determine whether such loss, if any, would have a material adverse effect on our financial condition, results of operations or liquidity.

From time to time, the Company is involved in other litigation and proceedings, including matters related to product liability claims, commercial disputes and intellectual property claims, as well as regulatory, employment, and other claims related to our business. The Company accrues for legal claims when, and to the extent that, amounts associated with the claims become probable and are reasonably estimable. The actual costs of resolving legal claims may be substantially higher or lower than the amounts accrued for those claims. For those matters as to which we are not able to estimate a possible loss or range of loss, we are not able to determine whether the loss will have a material adverse effect on our business, financial condition or results of operations or liquidity. No accrual has been recorded as of December 31, 2019 and December 31, 2018 related to such matters as they are not probable and/or reasonably estimable.

Management believes that all such current legal actions, in the aggregate, will not have a material adverse effect on the Company. However, the resolution of, or increase in any accruals for, one or more matters may have a material adverse effect on the Company’s results of operations and cash flows.

The Company also maintains insurance, including coverage for product liability claims, in amounts that management believes are appropriate given the nature of its business.

Note 9. Fair Value Measurements

The following table presents the Company’s hierarchy for its assets and liabilities measured at fair value on a recurring basis as of the following periods (in thousands):

	March 31, 2020								December 31, 2019
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents (money market funds)	$	70,000	$	—	$	—	$	70,000	$	—	$	—	$	—	$	—
Derivative assets	—		458		—		458		—		321		—		321
Total assets measured at fair value	$	70,000	$	458	$	—	$	70,458	$	—	$	321	$	—	$	321
Liabilities:
Derivative liabilities	$	—	$	147	$	—	$	147	$	—	$	433	$	—	$	433
Contingent consideration	—		—		16,501		16,501		—		—		16,535		16,535
Deferred consideration	—		153,277		—		153,277		—		151,382		—		151,382
Total liabilities measured at fair value	$	—	$	153,424	$	16,501	$	169,925	$	—	$	151,815	$	16,535	$	168,350

There were no transfers of assets or liabilities between Level 1, Level 2 and Level 3 categories of the fair value hierarchy during the three-month periods ended March 31, 2020 and the year ended December 31, 2019.

Cash equivalents consist of funds held in government money market accounts that are valued using quoted prices in active markets for identical instruments. Derivative financial instruments are measured based on observable inputs that are corroborated by market data. Observable inputs include broker quotes and daily market foreign currency rates and forward pricing curves. 

In connection with the acquisition of the BNP Business, the Company pays annual installments of $40.0 million each in deferred consideration through April 2023 and up to $8.0 million each in contingent consideration through April 2022. The fair

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value of the deferred consideration is calculated based on the net present value of cash payments using an estimated borrowing rate based on a quoted price for a similar liability. The Company recorded $1.9 million for the accretion of interest on the deferred consideration during the three months ended March 31, 2020. The fair value of contingent consideration is calculated using a discounted probability weighted valuation model. Significant assumptions used in the measurement include revenue projections and discount rates that are not observed in the market and thus represent Level 3 measurements. The discount rate of 4.0% used as of March 31, 2020 was based on estimated borrowing rate for a similar liability.

Changes in estimated fair value of contingent consideration liabilities from December 31, 2019 through March 31, 2020 were as follows (in thousands):

	Contingent consideration liabilities (Level 3 measurement)
Balance at December 31, 2019	$	16,535
Cash payments	(34)
Balance at March 31, 2020	$	16,501

Note 10. Derivatives and Hedging

In the normal course of business, the Company is exposed to gains and losses resulting from fluctuations in foreign currency exchange rates. As part of its strategy to manage the level of exposure to the risk of fluctuations in foreign currency exchange rates, the Company uses designated cash flow hedges in the form of foreign currency forward contracts to mitigate the impact of foreign currency translation on transactions that are denominated primarily in the Euro and the Chinese Yuan. The Company also uses non-designated forward contracts to hedge non-functional currency denominated balance sheet assets. All hedging relationships for all designated derivative hedges and the underlying hedged items, as well as the risk management objectives and strategies for undertaking the hedge transactions, are formally documented. The duration of these forward contracts are generally less than one year. The Company does not use any derivative financial instruments for trading or other speculative purposes.

Such forward foreign currency contracts are carried at fair value in prepaid expenses and other current assets or other current liabilities depending on the unrealized gain or loss position of the hedged contract as of the balance sheet date. Changes in the value of the designated derivatives are recorded to other comprehensive income (loss) until the underlying hedged item is recognized in earnings, or the derivative no longer qualifies as a highly effective hedge. Changes in the value of non-designated derivatives are recorded to other income/expense, net. The cash flows from derivatives treated as hedges are classified in the Consolidated Statements of Cash Flows in the same category as the item being hedged.

The notional principal amounts for outstanding derivative instruments provide one measure of the transaction volume outstanding and do not represent the amount of our exposure to credit or market loss. Credit risk represents our gross exposure to potential accounting loss on derivative instruments that are outstanding or unsettled if all counterparties failed to perform according to the terms of the contract, based on then-current currency exchange rates at each respective date. We generally enter into master netting arrangements, which reduces credit risk by permitting net settlement of transactions with the same counterparty. We present our derivative assets and derivative liabilities at their net fair values. We did not have any derivative instruments with credit-risk related contingent features that would require us to post collateral.

The following table summarizes the fair value and notional amounts of designated and non-designated foreign currency forward contracts as of March 31, 2020 and December 31, 2019 (in thousands):

	March 31, 2020				December 31, 2019
	Notional Amount		Fair Value, Net		Notional Amount		Fair Value, Net
Designated cash flow hedges:
Prepaid expenses and other current assets	$	23,828	$	429	$	27,944	$	321
Other current liabilities	$	12,157	$	147	$	6,219	$	433
Non-designated forward contracts:
Prepaid expenses and other current assets	$	7,906	$	29	$	—	$	—

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ITEM 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

In this Quarterly Report, all references to “we,” “our” and “us” refer to Quidel Corporation and its subsidiaries.

Future Uncertainties and Forward-Looking Statements

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of the federal securities laws that involve material risks, assumptions and uncertainties. Many possible events or factors could affect our future financial results and performance, such that our actual results and performance may differ materially from those that may be described or implied in the forward-looking statements. As such, no forward-looking statement can be guaranteed. Differences in actual results and performance may arise as a result of a number of factors including, without limitation: the impact of the novel virus (COVID-19) global pandemic; adverse changes in competitive conditions, the reimbursement system currently in place and future changes to that system, changes in economic conditions in our domestic and international markets, lower than anticipated market penetration of our products, our reliance on sales of our influenza and other respiratory or novel virus diagnostic tests, fluctuations in our operating results resulting from the timing of the onset, length and severity of cold and flu seasons, seasonality, government and media attention focused on influenza and other respiratory or novel viruses and the related potential impact on humans from such viruses, the quantity of our product in our distributors’ inventory or distribution channels, changes in the buying patterns of our distributors, and changes in the healthcare market and consolidation of our customer base; our development, acquisition and protection of proprietary technology rights; our development of new technologies, products and markets; our reliance on a limited number of key distributors; our exposure to claims and litigation that could result in significant expenses and could ultimately result in an unfavorable outcome for us, including the ongoing litigation between us and Beckman Coulter, Inc.; intellectual property risks, including but not limited to, infringement litigation; our need for additional funds to finance our capital or operating needs; the financial soundness of our customers and suppliers; acceptance of our products among physicians and other healthcare providers; competition with other providers of diagnostic products; failures or delays in receipt of new product reviews or related to currently-marketed products by the U.S. Food and Drug Administration (the “FDA”) or other regulatory authorities or loss of any previously received regulatory approvals or clearances or other adverse actions by regulatory authorities; changes in government policies; costs of and adverse operational impact from failure to comply with government regulations in addition to FDA regulations; compliance with government regulations relating to the handling, storage and disposal of hazardous substances; third-party reimbursement policies and potential cost constraints; our failure to comply with laws and regulations relating to billing and payment for healthcare services; our ability to meet demand for our products; interruptions in our supply of raw materials; product defects; business risks not covered by insurance; costs and disruptions from failures in our information technology and storage systems; our exposure to data corruption, cyber-based attacks, security breaches and privacy violations; competition for and loss of management and key personnel; international risks, including but not limited to, compliance with product registration requirements, compliance with legal requirements, tariffs, exposure to currency exchange fluctuations and foreign currency exchange risk, longer payment cycles, lower selling prices and greater difficulty in collecting accounts receivable, reduced protection of intellectual property rights, social, political and economic instability, increased financial accounting and reporting burdens and complexities, taxes, and diversion of lower priced international products into U.S. markets; changes in tax rates and exposure to additional tax liabilities or assessments; risks relating to our acquisition and integration of the Triage MeterPro Cardiovascular and toxicology business and B-type Naturietic Peptide assay business (the “Triage and BNP Businesses”); that we may have to write off goodwill relating to our acquisitions; our ability to manage our growth strategy and identify and integrate acquired companies or technologies and our ability to obtain financing; the level of our indebtedness and deferred payment obligations; our ability to generate sufficient cash to meet our debt service and deferred and contingent payment obligations; that our Revolving Credit Facility is secured by substantially all of our assets; the agreements for our indebtedness place operating and financial restrictions on us and our ability to operate our business; that an event of default could trigger acceleration of our outstanding indebtedness; that we may incur additional indebtedness; increases in interest rate relating to our variable rate debt; dilution resulting from future sales of our equity; volatility in our stock price; provisions in our charter documents, Delaware law and the indenture governing our Convertible Senior Notes that might delay or impede stockholder actions with respect to business combinations or similar transactions; our intention of not paying dividends; and our ability to identify and successfully acquire and integrate potential acquisition targets. Forward-looking statements typically are identified by the use of terms such as “may,” “will,” “should,” “might,” “expect,” “anticipate,” “estimate,” “plan,” “intend,” “goal,” “project,” “strategy,” “future,” and similar words, although some forward-looking statements are expressed differently. Forward-looking statements in this Quarterly Report include, among others, statements concerning: our outlook for the remainder of 2020 regarding our strategy, revenue growth, gross margins and earnings, including the sources of expected growth; that we expect to continue to make substantial expenditures for research and development activities; the nature and amount of projected capital expenditures for the remainder of 2020 and our source of funds for such expenditures; the sufficiency of our liquidity and capital resources; our strategy, goals, initiatives and objectives; our strategy, exposure to, and defenses against, claims and litigation, including the pending litigation with Beckman; the sufficiency of our liquidity and our short-term needs for capital; the sufficiency of our insurance coverage; that we may incur additional debt or issue additional equity; and our intention to continue to evaluate technology, product lines and acquisition and licensing opportunities. The risks described under “Risk Factors” in Item 1A Part II of this quarterly report on Form 10-Q and item 1A of our Annual Report on

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Form 10-K for the year ended December 31, 2019, and elsewhere herein and in reports and registration statements that we file with the Securities and Exchange Commission (the “SEC”) from time to time, should be carefully considered. You are cautioned not to place undue reliance on these forward-looking statements, which reflect management’s analysis only as of the date of this Quarterly Report. Except as required by law, we undertake no obligation to publicly release the results of any revision or update of these forward-looking statements, whether as a result of new information, future events or otherwise.

The following should be read in conjunction with the Consolidated Financial Statements and Notes thereto beginning on page 3 of this Quarterly Report.

Overview

We have a leadership position in the development, manufacturing and marketing of rapid diagnostic testing solutions. These diagnostic testing solutions are separated into our four product categories: rapid immunoassay, cardiometabolic immunoassay, specialized diagnostic solutions and molecular diagnostic solutions. We sell our products directly to end users and distributors, in each case, for professional use in physician offices, hospitals, clinical laboratories, reference laboratories, urgent care clinics, leading universities, retail clinics, pharmacies and wellness screening centers. We market our products through a network of distributors and through a direct sales force. We operate in one business segment that develops, manufactures and markets our four product categories.

Outlook

We anticipate continued revenue growth during the remainder of 2020, including a favorable impact from the sale of testing products related to the COVID-19 pandemic, with a positive impact on gross margin and earnings. We expect continued and significant investment in research and development activities as we develop our next generation immunoassay and molecular platforms, including our most recent focus on the development of assays to address the COVID-19 pandemic. We will continue our focus on prudently managing our business and delivering solid financial results, while at the same time striving to continue to introduce new products to the market and maintaining our emphasis on research and development investments for longer term growth. Finally, we will continue to evaluate opportunities to acquire new product lines, technologies and companies.

Three months ended March 31, 2020 compared to the three months ended March 31, 2019

Total Revenues

The following table compares total revenues for the three months ended March 31, 2020 and 2019 (in thousands, except percentages):

	Three Months Ended March 31,				Increase (Decrease)
	2020		2019		$		%
Rapid Immunoassay	$	95,930	$	62,494	$	33,436	54	%
Cardiometabolic Immunoassay	53,901		65,872		(11,971)		(18)	%
Specialized Diagnostic Solutions	16,459		13,854		2,605		19	%
Molecular Diagnostic Solutions	8,363		5,748		2,615		45	%
Total revenues	$	174,653	$	147,968	$	26,685	18	%

For the three months ended March 31, 2020, total revenue increased to $174.7 million from $148.0 million in the prior period. The Rapid Immunoassay category was the largest contributor to revenue growth, primarily resulting from respiratory products, bolstered by a strong respiratory season. Molecular products grew 45% over prior year, driven by continued revenue growth on the Solana platform as well as sales from our Lyra SARS-CoV-2 assay. The increase in Specialized Diagnostic Solutions was also driven by higher sales of respiratory products. The decrease in Cardiometabolic Immunoassay sales was driven mainly by lower demand resulting from the COVID-19 pandemic. Currency exchange rate impact for the quarter was unfavorable by $0.5 million, which had a minimal impact on the growth rate.

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Gross Profit

Gross profit increased to $115.0 million, or 66% of revenue for the three months ended March 31, 2020, compared to $90.9 million, or 61% of revenue for the three months ended March 31, 2019. The increased gross profit was driven by higher sales volumes, favorable product mix, higher manufacturing overhead absorption and improved geographic mix. This was partially offset by increased incentives to our distribution channel partners associated with higher sales volumes in the quarter. Gross margin increased compared to the same period in the prior year due to higher manufacturing overhead absorption as well as favorable product and geographic mix.

Operating Expenses

The following table compares operating expenses for the three months ended March 31, 2020 and 2019 (in thousands, except percentages):

	Three Months Ended March 31,
	2020				2019
	Operating expenses		As a % of total revenues		Operating expenses		As a % of total revenues		Increase (Decrease)
									$		%
Research and development	$	16,379	9	%	$	13,930	9	%	$	2,449	18	%
Sales and marketing	$	30,738	18	%	$	29,589	20	%	$	1,149	4	%
General and administrative	$	14,332	8	%	$	13,431	9	%	$	901	7	%
Acquisition and integration costs	$	1,914	1	%	$	2,824	2	%	$	(910)	(32)	%

Research and Development Expense

Research and development expense for the three months ended March 31, 2020 increased from $13.9 million to $16.4 million due primarily to higher employee-related costs, increased spending on clinical trials and Sofia assay and next-generation platform development projects.

Research and development expenses include direct external costs such as fees paid to third-party contractors and consultants, and internal direct and indirect costs such as compensation and other expenses for research and development personnel, supplies and materials, clinical trials and studies, facility costs and depreciation.

Sales and Marketing Expense

Sales and marketing expense for the three months ended March 31, 2020 increased from $29.6 million to $30.7 million due primarily to higher employee-related costs driven by improved performance during the current quarter.

General and Administrative Expense

General and administrative expense for the three months ended March 31, 2020 increased from $13.4 million to $14.3 million compared with the prior year period primarily due to higher employee related costs driven by improved performance during the current quarter.

Acquisition and Integration Costs

Acquisition and integration costs of $1.9 million for the three months ended March 31, 2020 primarily related to the evaluation of new business development opportunities. Acquisition and integration costs of $2.8 million for the three months ended March 31, 2019 consisted primarily of global operation integration costs.

Other Expense, Net

Interest and other expense, net decreased from $4.6 million to $2.8 million. Interest and other expense, net primarily relates to accretion of interest on the deferred consideration, coupon and accretion of interest related to our Convertible Senior Notes and amortization of deferred financing costs associated with our Credit Agreement. The decrease in interest expense of $1.8 million over the prior year was primarily due to lower debt balances under the Company’s Convertible Senior Notes,

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Revolving Credit Facility and lower accretion of interest as the total deferred consideration liability outstanding declined through 2019. See further discussion in Note 5 of the Notes to the Consolidated Financial Statements in this Quarterly Report.

Income Taxes

For the three months ended March 31, 2020 and 2019 respectively, the income tax expense was $8.6 million and $1.7 million. The higher tax expense for the three months ended March 31, 2020 compared to the same period in the prior year is a result of higher pre-tax profits partially offset by lower discrete tax benefits recorded in 2020 for excess tax benefits of stock-based compensation.

Liquidity and Capital Resources

As of March 31, 2020 and December 31, 2019, the principal sources of liquidity consisted of the following (in thousands): 

	March 31, 2020		December 31, 2019
Cash and cash equivalents	$	108,770	$	52,775
Amount available to borrow under the Revolving Credit Facility	$	175,000	$	175,000
Working capital including cash and cash equivalents	$	150,283	$	96,336
Adjusted working capital (1)	$	163,060	$	108,997

(1) The Convertible Senior Notes of $12.8 million and $12.7 million as of March 31, 2020 and December 31, 2019 respectively are excluded from the adjusted working capital amount as such notes may be settled at the Company’s option in cash or a combination of cash and shares of common stock.

As of March 31, 2020, we had $108.8 million in cash and cash equivalents, a $56.0 million increase from December 31, 2019. Our cash requirements fluctuate as a result of numerous factors, such as cash generated from operations, progress in research and development projects and integration activities, competition and technological developments and the time and expenditures required to obtain governmental approval of our products. In addition, we intend to continue to evaluate candidates for new product lines, company or technology acquisitions or technology licensing. If we decide to proceed with any such transactions, we may need to incur additional debt or issue additional equity, to successfully complete the transactions.

Our primary source of liquidity, other than our holdings of cash and cash equivalents, has been cash flows from operations and financing. Cash generated from operations provides us with the financial flexibility we need to meet normal operating, investing and financing needs. We anticipate that our current cash and cash equivalents, together with cash provided by operating activities will be sufficient to fund our near-term capital and operating needs for at least the next 12 months. As such, we have not applied for and do not anticipate needing to apply for any loans under the Paycheck Protection Program (the “PPP”), which was established under the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”).

Normal operating needs include the planned costs to operate our business, including amounts required to fund working capital and capital expenditures. Our primary short-term needs for capital, which are subject to change, include expenditures related to:  

•support of commercialization efforts related to our current and future products, including support of our direct sales force and field support resources;

•interest on and repayments of our Convertible Senior Notes, deferred consideration, contingent consideration and lease obligations;

•the continued advancement of research and development efforts;

•acquisitions of equipment and other fixed assets for use in our current and future manufacturing and research and development facilities; and

•potential strategic acquisitions and investments.

Our Convertible Senior Notes due in 2020 have a coupon rate of 3.25% and are convertible as of March 31, 2020. The principal balance outstanding as of March 31, 2020 was $13.1 million. The Amended and Restated Credit Agreement provides us with a Revolving Credit Facility of $175.0 million and there is no balance outstanding as of March 31, 2020. The Revolving Credit Facility matures on August 31, 2023. See Note 5 of the Notes to Consolidated Financial Statements in Part I, Item 1 of this Quarterly Report for further discussion of the Convertible Senior Notes and the Revolving Credit Facility.

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As of March 31, 2020, we have $16.5 million in fair value of contingent consideration and $153.3 million of deferred consideration associated with acquisitions to be settled in future periods, of which $48.0 million is payable in April 2020.

On December 12, 2018, the Company’s Board of Directors authorized a stock repurchase program, pursuant to which up

to $50.0 million of the Company’s shares of common stock may be purchased through December 12, 2020. There were no

shares repurchased under such program during the three months ended March 31, 2020.

We expect our revenue and operating expenses will significantly impact our cash management decisions. Our future capital requirements and the adequacy of our available funds to service our long-term debt and to fund working capital expenditures and business development efforts will depend on many factors, including:

•our ability to realize revenue growth from our new technologies and create innovative products in our markets;

•our outstanding debt and covenant restrictions;

•our ability to leverage our operating expenses to realize operating profits as we grow revenue;

•competing technological and market developments; and

•the need to enter into collaborations with other companies or acquire other companies or technologies to enhance or complement our product and service offerings.

Cash Flow Summary

	Three Months Ended March 31,
	2020		2019
Net cash provided by operating activities:	$	61,180	$	32,897
Net cash used for investing activities:	(5,884)		(4,993)
Net cash provided by (used for) financing activities:	705		(14,679)
Effect of exchange rates on cash	(6)		18
Net increase in cash and cash equivalents	$	55,995	$	13,243

Cash provided by operating activities of $61.2 million during the three months ended March 31, 2020 reflects net income of $40.2 million and non-cash adjustments of $18.5 million primarily associated with depreciation, amortization, stock-based compensation and accretion of interest on deferred consideration. Partially offsetting these inflows was a net working capital use of cash of $4.2 million. For the three months ended March 31, 2019, cash provided by operating activities of $32.9 million reflected net income of $24.8 million and non-cash adjustments of $18.5 million associated with depreciation, amortization, stock-based compensation and accretion of interest on deferred consideration. Partially offsetting these inflows was a net working capital use of cash of $11.2 million.

Our investing activities used $5.9 million during the three months ended March 31, 2020 primarily related to payments for computer equipment, building improvements, Sofia, Solana and Triage instruments available for lease and manufacturing equipment. Our investing activities used $5.0 million during the three months ended March 31, 2019 primarily to fund building improvements and the purchase of production equipment, and Sofia, Solana and Triage instruments available for lease.

We are currently planning approximately $40 million in capital expenditures for the remainder of 2020. The primary purpose for our capital expenditures is to acquire Sofia, Solana and Triage instruments, to acquire manufacturing and scientific equipment, to purchase or develop information technology and to implement facility improvements. We plan to fund these capital expenditures with the cash on our balance sheet.

Cash provided by financing activities was $0.7 million during the three months ended March 31, 2020 primarily related to proceeds from issuance of stock of $2.8 million from stock option exercises, partially offset by the repurchases of common stock of $2.0 million. Cash used by financing activities of $14.7 million during the three months ended March 31, 2019 primarily related to the payments on the Revolving Credit Facility of $20.0 million and repurchases of common stock of $1.5 million, partially offset by proceeds from issuance of stock of $6.8 million from stock option exercises.

Seasonality

Sales of our respiratory products are subject to, and significantly affected by, the seasonal demands of the cold and flu seasons, prevalent during the fall and winter. As a result of these seasonal demands, we typically experience lower sales volume in the second and third quarters of the calendar year, and typically have higher sales in the first and fourth quarters of the

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calendar year. Historically, sales of our respiratory products have varied from year to year based, in large part, on the severity, length and timing of the onset of the cold and flu season. Although the impact of COVID-19 on our business is still uncertain, there are early indications that COVID-19 may have some seasonality to its prevalence that could also impact the sales of our respiratory products from quarter to quarter.

Off-Balance Sheet Arrangements

At March 31, 2020 and December 31, 2019, we did not have any relationships with unconsolidated entities or financial partners, such as entities often referred to as structured finance or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. As such, we are not materially exposed to any financing, liquidity, market or credit risk that could arise if we had engaged in such relationships.

Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the U.S. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosures of contingent assets and liabilities. On an on-going basis, management evaluates its estimates, including those related to revenue recognition, goodwill and intangibles, business combinations and income taxes. We base our estimates on historical experience and on various other assumptions that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

A comprehensive discussion of our critical accounting policies and management estimates is included in Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K for the year ended December 31, 2019. There were no material changes to our critical accounting policies and estimates during the three months ended March 31, 2020.

ITEM 3. Quantitative and Qualitative Disclosures About Market Risk

Interest Rate Risk

We are not subject to interest rate risk on our Convertible Senior Notes as the Notes have a fixed rate of 3.25%. For fixed rate debt, changes in interest rates will generally affect the fair value of the debt instrument, but not our earnings or cash flows. Under our current policies, we do not use interest rate derivative instruments to manage our exposure to changes in interest rates.

Our current investment policy with respect to our cash and cash equivalents focuses on maintaining acceptable levels of interest rate risk and liquidity. Although we continually evaluate our placement of investments, as of March 31, 2020, our cash and cash equivalents were placed in the Company’s highly liquid operating accounts as well as government money market accounts.

Foreign Currency Exchange Risk

We are exposed to foreign currency risks that arise from normal business operations. These risks include the translation of local currency balances of foreign subsidiaries, transaction gains and losses associated with intercompany loans with foreign subsidiaries and transactions denominated in currencies other than a location’s functional currency.

22

During the three months ended March 31, 2020, total revenues increased 18% to $174.7 million, of which approximately $25.2 million in revenue was denominated in currencies other than the U.S. dollar. On a constant currency basis, revenue growth during the three months ended March 31, 2020 was also 18%. We believe constant currency and constant currency growth rate enhance the comparison of our financial performance from period-to-period, and to that of our competitors. Constant currency revenue excludes the impact from foreign currency fluctuations, which was an unfavorable $0.5 million for the three months ended March 31, 2020, and is calculated by translating current period revenues using prior period exchange rates, net of any hedging effect recognized in the current period. Constant currency revenue growth (expressed as a percentage) is calculated by determining the change in current period constant currency revenues over prior period revenues.

The major currencies to which our revenues are exposed are the Euro and the Chinese Yuan. A 100-basis point move in the average exchange rates (assuming a simultaneous and immediate 100 basis point change for the relevant period) would have resulted in an increase or decrease in our reported revenue for the three months ended March 31, 2020 as follows (in thousands):

	Three Months Ended March 31,
Currency	2020
Chinese Yuan	$	111
Euro	$	113

The Company has a foreign currency management policy in place that permits the use of derivative instruments, such as forward contracts, to reduce volatility in our results of operations resulting from foreign exchange rate fluctuations. We do not enter into foreign currency derivative instruments for trading purposes or to engage in speculative activity. See further discussion in Note 10 to the Notes to the Consolidated Financial Statements for additional information related to such forward contracts.

ITEM 4. Controls and Procedures

Evaluation of disclosure controls and procedures: We have performed an evaluation under the supervision and with the participation of our management, including our Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), of the effectiveness of our disclosure controls and procedures, as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934 (the “Exchange Act”). Based on that evaluation, our CEO and CFO concluded that our disclosure controls and procedures were effective as of March 31, 2020 at a reasonable assurance level to ensure that information required to be disclosed by us in the reports filed or submitted by us under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.

Changes in internal control over financial reporting: There was no change in our internal control over financial reporting during the quarter ended March 31, 2020 that materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II OTHER INFORMATION

ITEM 1. Legal Proceedings

The information set forth in the section entitled “Litigation and Other Legal Proceedings” under Note 8 of the Notes to the Consolidated Financial Statements, included in Part I, Item I of this Quarterly Report, is incorporated herein by reference.

ITEM 1A. Risk Factors

For a detailed description of our risk factors, refer to Item 1A, “Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2019. There has been no material change in our risk factors as previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2019 except as described below.

The novel coronavirus (COVID-19) global pandemic could adversely affect our business operations, financial performance and results of operations, the extent of which is uncertain and difficult to predict.

In late 2019, a novel strain of coronavirus (COVID-19) was reported to have surfaced in Wuhan, China, which has since spread globally. In March 2020, the World Health Organization declared COVID-19 a global pandemic. Further, the

23

COVID-19 outbreak has resulted in government authorities throughout the United States and around the world implementing numerous measures to try to reduce the spread of COVID-19, such as travel bans and restrictions, quarantines, shelter in place or total lock-down orders and business limitations and shutdowns. As a result of the COVID-19 outbreak and the related responses from government authorities, our business operations, financial performance and results of operations may be adversely impacted in a number of ways, including, but not limited to, the following:

•a slowdown or stoppage in the supply chain of the raw materials and packaging used to manufacture our products;

•interruptions or delays in global shipping to transport and deliver our products to our distributors and customers;

•interruptions in normal operations of certain end use customers that could result in reductions in demand for non-COVID-19 related healthcare operations and testing;

•disruptions to our operations, including a shutdown of one or more of our facilities or product lines; restrictions on our operations and sales, marketing and distribution efforts; and interruptions to our research and development, manufacturing, clinical/regulatory and other important business activities;

•shutdown or interruption of one or more of our manufacturing facilities due to contamination and costs incurred to clean and disinfect a facility following contamination;

•inefficiencies and increased costs in our production and shipping processes due to premium pay for manufacturing and certain other employees as well as social distancing and personal protective equipment requirements;

•delays in operations arising from limitations in the availability of personal protective equipment and clean room equipment and supplies for certain of our manufacturing personnel;

•limitations on employee resources and availability, including due to sickness, government restrictions, the desire of employees to avoid contact with large groups of people or mass transit disruptions;

•an increase in cyber-attacks given our public profile as a manufacturer of SARS-CoV-2 products;

•a fluctuation in foreign currency exchange rates or interest rates could result from market uncertainties;

•an increase in the cost or the difficulty to obtain debt or equity financing;

•an increase in exposure to credit losses for customers adversely affected by the COVID-19 pandemic;

•an increase in regulatory restrictions or continued market volatility could hinder our ability to execute strategic business activities, including acquisitions; and

•negatively impact our stock price.

The spread of COVID-19 has caused us to modify our business practices (including employee travel, employee work locations, and cancellation of physical participation in meetings, events and conferences), and we may take further actions as may be required by government authorities or that we determine are in the best interests of our employees, customers, partners, and suppliers. There is no certainty that such measures will be sufficient to mitigate the risks posed by the virus, and our ability to perform critical functions could be harmed.

We are continuing to rapidly and significantly expand our manufacturing capacity, including expanding and scaling our infrastructure to support our COVID-19 test products. This rapid expansion can place significant strain on our management, personnel, operations, systems and financial resources. Failure to successfully manage this expansion could negatively affect our operating results, including due to inefficiencies in implementing such expansion or higher costs for materials, technology, equipment and personnel during the intensity of the COVID-19 pandemic. Moreover, we may not realize the revenue growth and profitability we anticipate for our COVID-19 and other respiratory diagnostic products, which could result, among other factors, in a failure to realize the benefits of our manufacturing capacity expansion and the value of those investments being written down or written off.

24

Additionally, COVID-19 could negatively affect our internal controls over financial reporting as a portion of our workforce is required to work from home and therefore new processes, procedures, and controls could be required to respond to changes in our business environment. Further, should any key employees become ill from COVID-19 and unable to work, the attention of the management team could be diverted.

The effects of COVID-19 may exacerbate our other risk factors discussed in in Part I, Item 1A, Risk Factors, in our Annual report on Form 10-K for the year ended December 31, 2019. The degree to which COVID-19 impacts our business operations, financial performance and results of operations will depend on future developments, which are highly uncertain, continuously evolving and cannot be predicted, including, but not limited to, the duration and spread of the COVID-19 outbreak, its severity, the actions to contain the virus or treat its impact, how quickly and to what extent normal economic and operating conditions can resume and the residual economic and other effects. Because this situation continues to evolve globally, the ultimate impacts to us of COVID-19 are uncertain, but such impacts could have a material adverse effect on our business, financial performance and financial condition.

ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds

Issuer Purchases of Equity Securities

The table below sets forth information regarding repurchases of our common stock by us during the three months ended March 31, 2020.

Period	Total number of shares purchased (1)	Average price paid per share		Total number of shares purchased as part of publicly announced plans or programs	Approximate dollar value of shares that may yet be purchased under the plans  or programs (2)
December 30, 2019 - January 26, 2020	592	$	80.11	—	$	50,000,000
January 27, 2020 - February 23, 2020	23,259	79.44		—	50,000,000
February 24, 2020 - March 29, 2020	670	87.54		—	50,000,000
Total	24,521	$	79.68	—	$	50,000,000

(1) We withheld 24,521 shares of common stock from employees in connection with payment of minimum tax withholding obligations relating to the vesting of RSUs during the three months ended March 31, 2020.

(2) On December 12, 2018, the Board of Directors authorized a stock repurchase program, pursuant to which up to $50.0 million of the Company’s shares of common stock may be purchased through December 12, 2020. The Company announced

the stock repurchase program on December 18, 2018.

ITEM 3. Defaults Upon Senior Securities

None.

ITEM 4. Mine Safety Disclosures

Not applicable.

ITEM 5. Other Information

None.

25

ITEM 6. Exhibits

3.1	Restated Certificate of Incorporation of Quidel Corporation. (Incorporated by reference to Exhibit 3.1 to the Registrant’s Form 10-Q for the quarter ended September 30, 2010.)
3.2	Certificate of Amendment to the Restated Certificate of Incorporation of Quidel Corporation. (Incorporated by reference to Exhibit 3.1 to the Registrant’s Form 8-K filed on May 6, 2015.)
3.3	Amended and Restated Bylaws of Quidel Corporation. (Incorporated by reference to Exhibit 3.1 to the Registrant’s Form 8-K filed on February 27, 2015.)
4.1	Certificate of Designations of Series C Junior Participating Preferred Stock. (Incorporated by reference to Exhibit 4.1 to the Registrant’s Form 10-Q for the quarter ended September 30, 2010.)
31.1*	Certification by Principal Executive Officer of Quidel Corporation pursuant to Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification by Principal Financial Officer of Quidel Corporation pursuant to Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**	Certifications by Principal Executive Officer and Principal Financial Officer of Quidel Corporation pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101	The following financial statements from the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2020, formatted in Inline XBRL: (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Income, (iii) Consolidated Statements of Comprehensive Income, (iv) Consolidated Statements of Stockholders’ Equity, (v) Consolidated Statements of Cash Flows, and (vi) Notes to Consolidated Financial Statements, tagged as blocks of text and including detailed tags.
104	The cover page from the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2020, formatted in Inline XBRL (included as Exhibit 101).

___________________________

* Filed herewith.

** Furnished herewith.

26

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.

Date: May 6, 2020	QUIDEL CORPORATION
	/s/ DOUGLAS C. BRYANT
	Douglas C. Bryant
	President and Chief Executive Officer (Principal Executive Officer)
	/s/ RANDALL J. STEWARD
	Randall J. Steward
	Chief Financial Officer (Principal Financial Officer)

27

Exhibit Index

Exhibit Number
3.1	Restated Certificate of Incorporation of Quidel Corporation. (Incorporated by reference to Exhibit 3.1 to the Registrant’s Form 10-Q for the quarter ended September 30, 2010.)
3.2	Certificate of Amendment to the Restated Certificate of Incorporation of Quidel Corporation. (Incorporated by reference to Exhibit 3.1 to the Registrant’s Form 8-K filed on May 6, 2015.)
3.3	Amended and Restated Bylaws of Quidel Corporation. (Incorporated by reference to Exhibit 3.1 to the Registrant’s Form 8-K filed on February 27, 2015.)
4.1	Certificate of Designations of Series C Junior Participating Preferred Stock. (Incorporated by reference to Exhibit 4.1 to the Registrant’s Form 10-Q for the quarter ended September 30, 2010.)
31.1*	Certification by Principal Executive Officer of Quidel Corporation pursuant to Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification by Principal Financial Officer of Quidel Corporation pursuant to Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**	Certifications by Principal Executive Officer and Principal Financial Officer of Quidel Corporation pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101	The following financial statements from the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2020, formatted in Inline XBRL: (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Income, (iii) Consolidated Statements of Comprehensive Income, (iv) Consolidated Statements of Stockholders’ Equity, (v) Consolidated Statements of Cash Flows, and (vi) Notes to Consolidated Financial Statements, tagged as blocks of text and including detailed tags.
104	The cover page from the Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2020, formatted in Inline XBRL (included as Exhibit 101).

___________________________

* Filed herewith.

** Furnished herewith.

28

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Douglas C. Bryant, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Quidel Corporation;

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 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 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: May 6, 2020

/s/ DOUGLAS C. BRYANT

Douglas C. Bryant

President and Chief Executive Officer

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Randall J. Steward, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Quidel Corporation;

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 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 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: May 6, 2020

/s/ RANDALL J. STEWARD

Randall J. Steward

Chief Financial Officer

(Principal Financial Officer)

EX-32.1

Exhibit 32.1

Certifications by the Principal Executive Officer and Principal Financial Officer of Registrant pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Each of the undersigned hereby certifies, in his capacity as an officer of Quidel Corporation, a Delaware corporation (the “Company”), for purposes of 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of his knowledge:

•the Company’s Quarterly Report on Form 10-Q for the period ended March 31, 2020 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

•the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: May 6, 2020

/s/ DOUGLAS C. BRYANT

Douglas C. Bryant

President and Chief Executive Officer

(Principal Executive Officer)

/s/ RANDALL J. STEWARD

Randall J. Steward

Chief Financial Officer

(Principal Financial Officer)

XML

Balance Sheet Account Details Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Inventory, Net [Abstract]
Raw materials	$ 22,508	$ 23,294
Work-in-process (materials, labor and overhead)	19,662	20,514
Finished goods (materials, labor and overhead)	16,538	14,278
Total inventories	$ 58,708	$ 58,086

XML

Debt (Tables)

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Schedule of Debt

The following table summarizes information about the equity and liability components of the Convertible Senior Notes (dollars in thousands). The fair values of the respective notes outstanding were measured based on quoted market price and is a Level 2 measurement.

	March 31, 2020		December 31, 2019
Principal amount outstanding	$	13,131	$	13,131
Unamortized discount of liability component	(312)		(415)
Unamortized debt issuance costs	(42)		(55)
Net carrying amount of liability component	$	12,777	$	12,661
Carrying value of equity component, net of issuance costs	$	2,265	$	2,265
Fair value of outstanding Convertible Senior Notes	$	38,633	$	30,991
Remaining amortization period of discount on the liability component	0.8 years		1.0 year

XML

Derivatives and Hedging (Tables)

3 Months Ended

Mar. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Assets at Fair Value

The following table summarizes the fair value and notional amounts of designated and non-designated foreign currency forward contracts as of March 31, 2020 and December 31, 2019 (in thousands):

	March 31, 2020				December 31, 2019
	Notional Amount		Fair Value, Net		Notional Amount		Fair Value, Net
Designated cash flow hedges:
Prepaid expenses and other current assets	$	23,828	$	429	$	27,944	$	321
Other current liabilities	$	12,157	$	147	$	6,219	$	433
Non-designated forward contracts:
Prepaid expenses and other current assets	$	7,906	$	29	$	—	$	—

XML

Commitments and Contingencies Lease Expense (Details)		3 Months Ended
	Jan. 05, 2018	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Lessee, sale leaseback, renewal term	5 years
Optional renewal term		5 years

XML

Stockholders' Equity - Estimated Fair Value of Each Stock Option Award (Details) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Equity [Abstract]
Risk-free interest rate	1.35%	2.51%
Expected option life (in years)	5 years 1 month 20 days	5 years 8 months 4 days
Volatility rate	39.00%	39.00%
Dividend rate	0.00%	0.00%
Weighted-average grant date fair value of stock options granted (in USD per share)	$ 28.24	$ 23.67

XML

Fair Value Measurements - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)	Oct. 06, 2017 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Non-cash interest expense, deferred consideration	$ 1.9
Consideration B | BNP Business
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amount of installment payment		$ 40.0
Consideration A | BNP Business
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amount of installment payment		$ 8.0
Measurement Input, Discount Rate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.040

XML

Debt - Components of Convertible Senior Notes (Details) - Convertible Senior Notes - Convertible Senior Notes - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Principal amount outstanding	$ 13,131	$ 13,131
Unamortized discount of liability component	(312)	(415)
Unamortized debt issuance costs	(42)	(55)
Net carrying amount of liability component	12,777	12,661
Carrying value of equity component, net of issuance costs	2,265	2,265
Fair value of outstanding Convertible Senior Notes	$ 38,633	$ 30,991
Remaining amortization period of discount on the liability component	9 months 18 days	1 year

XML

Balance Sheet Account Details Prepaid expenses and other current assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Prepaid Expense and Other Assets, Current [Abstract]
Other receivables	$ 8,645	$ 7,857
Prepaid expenses	5,952	4,568
Income taxes receivable	0	2,560
Other	2,258	1,885
Total prepaid expenses and other current assets	$ 16,855	$ 16,870

XML

Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issued in connection with employee stock purchase plan (in shares)	27,826,000
Restricted stock granted, weighted average fair value (in USD per share)	$ 77.53
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 35.7
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected weighted-average period of recognition for unrecognized compensation expense	2 years 9 months 18 days
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted, weighted average fair value (in USD per share)	$ 77.53	$ 59.45

XML

Stockholders' Equity

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Stockholders' Equity

Stockholders’ Equity

Issuances of Common Stock

A summary of the status of stock option activity for the three months ended March 31, 2020 is as follows (in thousands, except price data):

	Shares	Weighted-average exercise price per share
Outstanding at December 31, 2019	944	$	30.63
Granted	121	77.16
Exercised	(65)	21.26
Forfeited	(12)	43.34
Outstanding at March 31, 2020	988	$	36.77

A summary of the status of restricted stock unit activity for the three months ended March 31, 2020 is as follows (in thousands, except price data):

	Shares	Weighted-average grant date fair value
Non-vested December 31, 2019	786	$	41.88
Granted	186	77.53
Vested	(60)	18.21
Forfeited	(17)	49.85
Non-vested at March 31, 2020	895	$	50.74

During the three months ended March 31, 2020, the Company issued 27,826 shares of common stock in connection with the Company’s employee stock purchase plan (the “ESPP”).

Stock-Based Compensation

The expense related to the Company’s stock-based compensation plans included in the accompanying Consolidated Statements of Income was as follows (in thousands):

	Three Months Ended March 31,
	2020		2019
Cost of sales	$	258	$	280
Research and development	642		565
Sales and marketing	1,297		1,119
General and administrative	1,681		1,624
Total stock-based compensation expense	$	3,878	$	3,588

As of March 31, 2020, total unrecognized compensation expense was $35.7 million, which is expected to be recognized over a weighted-average period of approximately 2.8 years.

The estimated fair value of each stock option was determined on the date of grant using the Black-Scholes option valuation model with the following weighted-average assumptions for the option grants.

	Three Months Ended March 31,
	2020			2019
Risk-free interest rate	1.35		%	2.51		%
Expected option life (in years)	5.14			5.68
Volatility rate	39		%	39		%
Dividend rate	0		%	0		%
Weighted-average grant date fair value	$	28.24		$	23.67

The fair value of RSUs is determined based on the closing market price of the Company’s common stock on the grant date. The weighted-average fair value of RSUs granted during the three months ended March 31, 2020 and 2019 was $77.53 and $59.45, respectively.

Compensation expense capitalized to inventory and compensation expense related to the Company’s ESPP were not material for the three months ended March 31, 2020 or 2019.

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Computation of Earnings Per Share

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Computation of Earnings Per Share

Computation of Earnings Per Share

Basic earnings per share (“EPS”) is computed by dividing net income by the weighted-average number of common shares outstanding, including restricted stock units (“RSUs”) vested during the period. Diluted EPS is computed based on the sum of the weighted average number of common shares and potentially dilutive common shares outstanding during the period. Potentially dilutive common shares consist of shares issuable from stock options, unvested RSUs and the 3.25% Convertible Senior Notes due 2020 (“Convertible Senior Notes”). Potentially dilutive common shares from outstanding stock options and unvested RSUs are determined using the average share price for each period under the treasury stock method. Potentially dilutive shares from the Convertible Senior Notes are determined using the if-converted method. Under the provisions of the if-converted method, the Convertible Senior Notes are assumed to be converted and included in the denominator of the EPS calculation and the interest expense, net of tax, recorded in connection with the Convertible Senior Notes is added back to net income.

The Convertible Senior Notes have a dilutive impact when the average market price of the Company’s common stock exceeds the applicable conversion price of the notes. The Senior Convertible Notes became convertible on March 31, 2018 and remained convertible through March 31, 2020.

The following table reconciles net income and the weighted-average shares used in computing basic and diluted earnings per share (in thousands):

	Three Months Ended March 31,
	2020		2019
Numerator:
Net income used for basic earnings per share	$	40,237	$	24,844
Interest expense on Convertible Senior Notes, net of tax	181		791
Net income used for diluted earnings per share, if-converted method	$	40,418	$	25,635
Basic weighted-average common shares outstanding	42,056		39,704
Dilutive potential shares issuable from Convertible Senior Notes	410		1,825
Dilutive potential shares issuable from stock options and unvested RSUs	937		1,378
Diluted weighted-average common shares outstanding, if-converted	43,403		42,907
Potentially dilutive shares excluded from calculation due to anti-dilutive effect	97		149

Potentially dilutive shares excluded from the calculation above represent stock options when the combined exercise price and unrecognized stock-based compensation are greater than the average market price for the Company’s common stock because their effect is anti-dilutive.

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Derivatives and Hedging

3 Months Ended

Mar. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives and Hedging

Derivatives and Hedging

In the normal course of business, the Company is exposed to gains and losses resulting from fluctuations in foreign currency exchange rates. As part of its strategy to manage the level of exposure to the risk of fluctuations in foreign currency exchange rates, the Company uses designated cash flow hedges in the form of foreign currency forward contracts to mitigate the impact of foreign currency translation on transactions that are denominated primarily in the Euro and the Chinese Yuan. The Company also uses non-designated forward contracts to hedge non-functional currency denominated balance sheet assets. All hedging relationships for all designated derivative hedges and the underlying hedged items, as well as the risk management objectives and strategies for undertaking the hedge transactions, are formally documented. The duration of these forward contracts are generally less than one year. The Company does not use any derivative financial instruments for trading or other speculative purposes.

Such forward foreign currency contracts are carried at fair value in prepaid expenses and other current assets or other current liabilities depending on the unrealized gain or loss position of the hedged contract as of the balance sheet date. Changes in the value of the designated derivatives are recorded to other comprehensive income (loss) until the underlying hedged item is recognized in earnings, or the derivative no longer qualifies as a highly effective hedge. Changes in the value of non-designated derivatives are recorded to other income/expense, net. The cash flows from derivatives treated as hedges are classified in the Consolidated Statements of Cash Flows in the same category as the item being hedged.

The notional principal amounts for outstanding derivative instruments provide one measure of the transaction volume outstanding and do not represent the amount of our exposure to credit or market loss. Credit risk represents our gross exposure to potential accounting loss on derivative instruments that are outstanding or unsettled if all counterparties failed to perform according to the terms of the contract, based on then-current currency exchange rates at each respective date. We generally enter into master netting arrangements, which reduces credit risk by permitting net settlement of transactions with the same counterparty. We present our derivative assets and derivative liabilities at their net fair values. We did not have any derivative instruments with credit-risk related contingent features that would require us to post collateral.

The following table summarizes the fair value and notional amounts of designated and non-designated foreign currency forward contracts as of March 31, 2020 and December 31, 2019 (in thousands):

	March 31, 2020				December 31, 2019
	Notional Amount		Fair Value, Net		Notional Amount		Fair Value, Net
Designated cash flow hedges:
Prepaid expenses and other current assets	$	23,828	$	429	$	27,944	$	321
Other current liabilities	$	12,157	$	147	$	6,219	$	433
Non-designated forward contracts:
Prepaid expenses and other current assets	$	7,906	$	29	$	—	$	—

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Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 40,237	$ 24,844
Other comprehensive income (loss)
Changes in cumulative translation adjustment, net of tax	(65)	(248)
Net unrealized gains on derivative instruments	406	290
Reclassification of net realized gains on derivative instruments included in net income	(141)	0
Total change in unrealized gains from cash flow hedges, net of tax	265	290
Comprehensive income	$ 40,437	$ 24,886

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Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	May 01, 2020
Document And Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
Document Transition Report	false
Entity File Number	0-10961
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-2573850
Entity Address, Address Line One	9975 Summers Ridge Road
Entity Address, City or Town	San Diego
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92121
City Area Code	858
Local Phone Number	552-1100
Title of 12(b) Security	Common Stock, $0.001 Par Value
Trading Symbol	QDEL
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		41,999,003
Entity Registrant Name	QUIDEL CORP /DE/
Entity Central Index Key	0000353569
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false

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Derivatives and Hedging - Foreign Currency (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Designated as Hedging Instrument | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative Liability, Notional Amount	$ 12,157	$ 6,219
Derivative Liability, Fair Value, Gross Liability	147	433
Prepaid expenses and other current assets | Designated as Hedging Instrument | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Notional Amount	23,828	27,944
Derivative Asset, Fair Value, Gross Asset	429	321
Prepaid expenses and other current assets | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount	7,906	0
Derivative Asset, Fair Value, Gross Asset	$ 29	$ 0

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Stockholders' Equity - Compensation Expense Related to Stock-Based Compensation Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 3,878	$ 3,588
Cost of sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	258	280
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	642	565
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	1,297	1,119
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 1,681	$ 1,624

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Debt - Credit Agreement, Additional Information (Details)		3 Months Ended
	Aug. 31, 2018 USD ($) covenant	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity	$ 175,000,000.0
Commitment fee percentage	0.15%
Commitment fee percentage on unused capacity	0.30%
Number of financial covenants | covenant	2
Ratio of indebtedness to net capital	3.50
Consolidated fixed charge coverage ratio	1.25
Interest expense, debt		$ 200,000	$ 1,000,000.0
Maximum
Debt Instrument [Line Items]
Ratio of indebtedness to net capital	4.50
Fed Funds Effective Rate Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate		0.005%
Base Rate
Debt Instrument [Line Items]
Stated interest rate	1.00%
Base Rate | Minimum
Debt Instrument [Line Items]
Stated interest rate	0.75%
Base Rate | Maximum
Debt Instrument [Line Items]
Stated interest rate	1.50%
London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Stated interest rate	2.00%
London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Stated interest rate	1.75%
London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Stated interest rate	2.50%
Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, term		5 years
Interest expense, debt		$ 200,000	$ 600,000

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Balance Sheet Account Details Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Customer incentives	$ 8,848	$ 7,369
Income and other taxes payable	6,783	1,214
Customer deposits	79	1,500
Other	5,902	4,779
Total other current liabilities	$ 21,612	$ 14,862

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Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Total revenues	$ 174,653	$ 147,968
Cost of sales	59,662	57,041
Gross profit	114,991	90,927
Research and development	16,379	13,930
Sales and marketing	30,738	29,589
General and administrative	14,332	13,431
Acquisition and integration costs	1,914	2,824
Total operating expenses	63,363	59,774
Operating income	51,628	31,153
Interest and other expense, net	2,807	4,582
Income before income taxes	48,821	26,571
Provision for income taxes	8,584	1,727
Net income	$ 40,237	$ 24,844
Basic earnings per share	$ 0.96	$ 0.63
Diluted earnings per share	$ 0.93	$ 0.60
Shares used in basic per share calculation	42,056	39,704
Shares used in diluted per share calculation	43,403	42,907

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Debt

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Debt

Debt

Convertible Senior Notes

In December 2014, the Company issued $172.5 million aggregate principal amount of its 3.25% Convertible Senior Notes. Debt issuance costs of approximately $5.1 million were primarily comprised of underwriters fees, legal, accounting and other professional fees, of which $4.2 million were recorded as a reduction to long-term debt and are being amortized using the effective interest method to interest expense over the six-year term of the Convertible Senior Notes. The remaining $0.9 million of debt issuance costs were allocated as a component of equity in additional paid-in capital. The implied interest rate of the Convertible Senior Notes was 6.9%, assuming no conversion option. The Convertible Senior Notes mature on December 15, 2020.

The Convertible Senior Notes are convertible into cash, shares of common stock, or a combination of cash and shares of common stock based on an initial conversion rate, subject to adjustment, of 31.1891 shares per $1,000 principal amount of the Convertible Senior Notes (which represents an initial conversion price of approximately 32.06 per share) in the following circumstances and to the following extent: (1) during any calendar quarter commencing after the calendar quarter ending on March 31, 2015, if the last reported sales price of the Company’s common stock, for at least 20 trading days (whether or not consecutive) in the period of 30 consecutive trading days ending on the last trading day of the calendar quarter immediately preceding the calendar quarter in which the conversion occurs, is more than 130% of the conversion price of the notes in effect

on each applicable trading day; (2) during the five consecutive business day period following any five consecutive trading day period in which the trading price per $1,000 principal amount of the Convertible Senior Notes for each such trading day was less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such day; or (3) upon the occurrence of specified events described in the indenture for the Convertible Senior Notes. On or after September 15, 2020 until the close of business on the second scheduled trading day immediately preceding the stated maturity date, holders may surrender their notes for conversion at any time, regardless of the foregoing circumstances. If a fundamental change, as defined in the indenture for the Convertible Senior Notes, such as an acquisition, merger or liquidation of the Company, occurs prior to the maturity date, subject to certain limitations, holders of the Convertible Senior Notes may require the Company to repurchase all or a portion of their Convertible Senior Notes for cash at a repurchase price equal to 100% of the principal amount of the Convertible Senior Notes to be repurchased, plus any accrued and unpaid interest to, but excluding, the repurchase date.

During the first quarter of 2020, the last reported sales price of the Company’s common stock was greater than 130% of the Convertible Senior Notes conversion price for 20 or more of the 30 consecutive trading days preceding the quarter-end. Consequently, the Convertible Senior Notes were convertible as of March 31, 2020. If the Convertible Senior Notes were converted as of March 31, 2020, the if-converted amount would exceed the principal by $0.6 million. The Convertible Senior Notes may be settled at the Company’s option in cash or a combination of cash and shares of common stock.

The Company pays 3.25% interest per annum on the principal amount of the Convertible Senior Notes semi-annually in arrears in cash on June 15 and December 15 of each year. During the three months ended March 31, 2020, the Company recorded total interest expense of $0.2 million related to the Convertible Senior Notes, of which $0.1 million related to the amortization of the debt discount and issuance costs and $0.1 million related to the coupon due semi-annually. During the three months ended March 31, 2019, the Company recorded total interest expense of $1.0 million related to the Convertible Senior Notes of which $0.5 million related to the amortization of the debt discount and issuance costs and $0.5 million related to the coupon due semi-annually. 

The following table summarizes information about the equity and liability components of the Convertible Senior Notes (dollars in thousands). The fair values of the respective notes outstanding were measured based on quoted market price and is a Level 2 measurement.

	March 31, 2020		December 31, 2019
Principal amount outstanding	$	13,131	$	13,131
Unamortized discount of liability component	(312)		(415)
Unamortized debt issuance costs	(42)		(55)
Net carrying amount of liability component	$	12,777	$	12,661
Carrying value of equity component, net of issuance costs	$	2,265	$	2,265
Fair value of outstanding Convertible Senior Notes	$	38,633	$	30,991
Remaining amortization period of discount on the liability component	0.8 years		1.0 year

Credit Agreement

On August 31, 2018, the Company entered into an Amended and Restated Credit Agreement (the “Credit Agreement”) which provides the Company with a $175.0 million Revolving Credit Facility. There is no balance outstanding as of March 31, 2020. The Credit Agreement has a term of five years and matures on August 31, 2023.

Loans will bear interest at a rate equal to (i) the London Interbank Offered Rate (“LIBOR”) plus the “applicable rate” or (ii) the “base rate” (defined as the highest of (a) the Bank of America prime rate, (b) the Federal Funds rate plus one-half of one percent and (c) LIBOR plus one percent) plus the “applicable rate.” The initial applicable rate was 1.00% per annum for base rate loans and 2.00% per annum for LIBOR rate loans, and thereafter will be determined in accordance with a pricing grid based on the Company’s Consolidated Leverage Ratio (as defined in the Credit Agreement) ranging from 1.75% to 2.50% per annum for LIBOR rate loans and from 0.75% to 1.50% per annum for base rate loans. In addition, the Company pays a commitment fee on the unused portion of the Credit Agreement based on the Company’s Consolidated Leverage Ratio ranging from 0.15% to 0.30% per annum.

The Credit Agreement is guaranteed by certain material domestic subsidiaries of the Company (the “Guarantors”) and is secured by liens on substantially all of the assets of the Company and the Guarantors, excluding real property and certain other types of excluded assets, and contains affirmative and negative covenants that are customary for credit agreements of this

nature. The negative covenants include, among other things, limitations on asset sales, mergers, indebtedness, liens, dividends and other distributions, investments and transactions with affiliates. The Credit Agreement contains two financial covenants: (i) maximum Consolidated Leverage Ratio (as defined in the Credit Agreement) as of the last day of each fiscal quarter of 3.50 to 1.00, which ratio may be increased to 4.50 to 1.00 in case of certain qualifying acquisitions; and (ii) a minimum Consolidated Fixed Charge Coverage Ratio (as defined in the Credit Agreement) of 1.25 to 1.00 as of the end of any fiscal quarter for the most recently completed four fiscal quarters. The Company was in compliance with all financial covenants as of March 31, 2020. 

Interest expense recognized under the Credit Agreement, including amortization of deferred issuance cost, was $0.2 million for the three months ended March 31, 2020 and $0.6 million for the three months ended March 31, 2019.

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Basis of Presentation

The accompanying unaudited consolidated financial statements of Quidel Corporation and its subsidiaries (the “Company”) have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation (consisting of normal recurring accruals) have been included.

The information at March 31, 2020, and for the three months ended March 31, 2020 and 2019, is unaudited. For further information, refer to the Company’s consolidated financial statements and notes thereto for the year ended December 31, 2019 included in the Company’s 2019 Annual Report on Form 10-K. Operating results for any quarter are historically seasonal in nature and are not necessarily indicative of the results expected for the full year.

For 2020 and 2019, the Company’s fiscal year will end or has ended on January 3, 2021 and December 29, 2019, respectively. For 2020 and 2019, the Company’s first quarter ended on March 29, 2020 and March 31, 2019, respectively. For ease of reference, the calendar quarter end dates are used herein. The three-month periods ended March 31, 2020 and 2019 each included 13 weeks.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Significant Accounting Policies

During the three months ended March 31, 2020, there have been no changes to our significant accounting policies as described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2019.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

The following table presents the Company’s hierarchy for its assets and liabilities measured at fair value on a recurring basis as of the following periods (in thousands):

	March 31, 2020								December 31, 2019
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents (money market funds)	$	70,000	$	—	$	—	$	70,000	$	—	$	—	$	—	$	—
Derivative assets	—		458		—		458		—		321		—		321
Total assets measured at fair value	$	70,000	$	458	$	—	$	70,458	$	—	$	321	$	—	$	321
Liabilities:
Derivative liabilities	$	—	$	147	$	—	$	147	$	—	$	433	$	—	$	433
Contingent consideration	—		—		16,501		16,501		—		—		16,535		16,535
Deferred consideration	—		153,277		—		153,277		—		151,382		—		151,382
Total liabilities measured at fair value	$	—	$	153,424	$	16,501	$	169,925	$	—	$	151,815	$	16,535	$	168,350

There were no transfers of assets or liabilities between Level 1, Level 2 and Level 3 categories of the fair value hierarchy during the three-month periods ended March 31, 2020 and the year ended December 31, 2019.

Cash equivalents consist of funds held in government money market accounts that are valued using quoted prices in active markets for identical instruments. Derivative financial instruments are measured based on observable inputs that are corroborated by market data. Observable inputs include broker quotes and daily market foreign currency rates and forward pricing curves. 

In connection with the acquisition of the BNP Business, the Company pays annual installments of $40.0 million each in deferred consideration through April 2023 and up to $8.0 million each in contingent consideration through April 2022. The fair

value of the deferred consideration is calculated based on the net present value of cash payments using an estimated borrowing rate based on a quoted price for a similar liability. The Company recorded $1.9 million for the accretion of interest on the deferred consideration during the three months ended March 31, 2020. The fair value of contingent consideration is calculated using a discounted probability weighted valuation model. Significant assumptions used in the measurement include revenue projections and discount rates that are not observed in the market and thus represent Level 3 measurements. The discount rate of 4.0% used as of March 31, 2020 was based on estimated borrowing rate for a similar liability.

Changes in estimated fair value of contingent consideration liabilities from December 31, 2019 through March 31, 2020 were as follows (in thousands):

	Contingent consideration liabilities (Level 3 measurement)
Balance at December 31, 2019	$	16,535
Cash payments	(34)
Balance at March 31, 2020	$	16,501

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Balance Sheet Account Details (Tables)

3 Months Ended

Mar. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Inventory

Inventories are stated at the lower of cost (first-in, first-out) or net realizable value. Inventories consisted of the following (in thousands):

	March 31, 2020		December 31, 2019
Raw materials	$	22,508	$	23,294
Work-in-process (materials, labor and overhead)	19,662		20,514
Finished goods (materials, labor and overhead)	16,538		14,278
Total inventories	$	58,708	$	58,086

Other Current Assets

Prepaid expenses and other current assets consist of the following (in thousands):

	March 31, 2020		December 31, 2019
Other receivables	$	8,645	$	7,857
Prepaid expenses	5,952		4,568
Income taxes receivable	—		2,560
Other	2,258		1,885
Total prepaid expenses and other current assets	$	16,855	$	16,870

Other Current Liabilities

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

	March 31, 2020		December 31, 2019
Customer incentives	$	8,848	$	7,369
Income and other taxes payable	6,783		1,214
Customer deposits	79		1,500
Other	5,902		4,779
Total other current liabilities	$	21,612	$	14,862

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Liabilities Measured at Fair Value on Recurring Basis

The following table presents the Company’s hierarchy for its assets and liabilities measured at fair value on a recurring basis as of the following periods (in thousands):

	March 31, 2020								December 31, 2019
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents (money market funds)	$	70,000	$	—	$	—	$	70,000	$	—	$	—	$	—	$	—
Derivative assets	—		458		—		458		—		321		—		321
Total assets measured at fair value	$	70,000	$	458	$	—	$	70,458	$	—	$	321	$	—	$	321
Liabilities:
Derivative liabilities	$	—	$	147	$	—	$	147	$	—	$	433	$	—	$	433
Contingent consideration	—		—		16,501		16,501		—		—		16,535		16,535
Deferred consideration	—		153,277		—		153,277		—		151,382		—		151,382
Total liabilities measured at fair value	$	—	$	153,424	$	16,501	$	169,925	$	—	$	151,815	$	16,535	$	168,350

Changes in Estimated Fair Value of Contingent Consideration Liabilities

Changes in estimated fair value of contingent consideration liabilities from December 31, 2019 through March 31, 2020 were as follows (in thousands):

	Contingent consideration liabilities (Level 3 measurement)
Balance at December 31, 2019	$	16,535
Cash payments	(34)
Balance at March 31, 2020	$	16,501

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Computation of Earnings Per Share - Additional information (Details)	Mar. 31, 2020
Convertible Senior Notes | 3.25% Convertible Senior Notes due 2020 | Convertible Senior Notes
Debt Instrument [Line Items]
Stated interest rate	3.25%

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Fair Value Measurements - Changes in Estimated Fair Value of Contingent Consideration Liabilities (Details) - Level 3 - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	$ 16,501	$ 16,535
Cash payments	$ (34)

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Commitments and Contingencies Minimum Rentals (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals	$ 2.4
Operating Leases, Rent Expense, Sublease Rentals	$ 0.1

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Industry and Geographic Information - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Revenue, Major Customer [Line Items]
Number of reportable segments | segment	1
Customer Concentration Risk | Non-US
Revenue, Major Customer [Line Items]
Sales to customers outside the U.S.	$ 41.2	$ 41.5
Customer Concentration Risk | Sales
Revenue, Major Customer [Line Items]
Percentage of risk concentration by major customer	60.00%	54.00%
Customer Concentration Risk | Sales | Non-US
Revenue, Major Customer [Line Items]
Percentage of risk concentration by major customer	24.00%	28.00%
Geographic Concentration Risk | Non-US
Revenue, Major Customer [Line Items]
Accounts receivable	$ 24.1		$ 23.0
Credit Concentration Risk
Revenue, Major Customer [Line Items]
Accounts receivable	$ 73.9		$ 67.4

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Consolidated Statements of Stockholders' Equity Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional paid-in capital	Accumulated other comprehensive (loss) income	Retained earnings
Balance (in shares) at Dec. 31, 2018		39,386
Balance at Dec. 31, 2018	$ 425,584	$ 39	$ 363,921	$ (139)	$ 61,763
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under equity compensation plans (in shares)		444
Issuance of common stock under equity compensation plans	8,817	$ 1	8,816
Stock-based compensation expense	2,887		2,887
Repurchases of common stock (in shares)		(24)
Repurchases of common stock	(1,476)		(1,476)
Other comprehensive gain, net of tax	(248)
Other comprehensive gain, net of tax				42
Net income	24,844				24,844
Balance (in shares) at Mar. 31, 2019		39,806
Balance at Mar. 31, 2019	460,698	$ 40	374,148	(97)	86,607
Balance (in shares) at Dec. 31, 2019		41,868
Balance at Dec. 31, 2019	559,820	$ 42	425,557	(463)	134,684
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under equity compensation plans (in shares)		153
Issuance of common stock under equity compensation plans	3,571	$ 0	3,571
Stock-based compensation expense	3,325		3,325
Repurchases of common stock (in shares)		(25)
Repurchases of common stock	(1,954)		(1,954)
Other comprehensive gain, net of tax	(65)
Other comprehensive gain, net of tax				200
Net income	40,237				40,237
Balance (in shares) at Mar. 31, 2020		41,996
Balance at Mar. 31, 2020	$ 605,199	$ 42	$ 430,499	$ (263)	$ 174,921

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying unaudited consolidated financial statements of Quidel Corporation and its subsidiaries (the “Company”) have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation (consisting of normal recurring accruals) have been included.

The information at March 31, 2020, and for the three months ended March 31, 2020 and 2019, is unaudited. For further information, refer to the Company’s consolidated financial statements and notes thereto for the year ended December 31, 2019 included in the Company’s 2019 Annual Report on Form 10-K. Operating results for any quarter are historically seasonal in nature and are not necessarily indicative of the results expected for the full year.

For 2020 and 2019, the Company’s fiscal year will end or has ended on January 3, 2021 and December 29, 2019, respectively. For 2020 and 2019, the Company’s first quarter ended on March 29, 2020 and March 31, 2019, respectively. For ease of reference, the calendar quarter end dates are used herein. The three-month periods ended March 31, 2020 and 2019 each included 13 weeks.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Recent Accounting Pronouncements

Significant Accounting Policies

During the three months ended March 31, 2020, there have been no changes to our significant accounting policies as described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2019.

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Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 108,770	$ 52,775
Accounts receivable, net	102,146	94,496
Inventories	58,708	58,086
Prepaid expenses and other current assets	16,855	16,870
Total current assets	286,479	222,227
Property, plant and equipment, net	79,915	79,762
Right-of-use assets	90,490	92,119
Goodwill	337,017	337,018
Intangible assets, net	141,268	148,112
Deferred tax asset	24,424	24,502
Other non-current assets	7,173	7,127
Total assets	966,766	910,867
Current liabilities:
Accounts payable	33,153	26,701
Accrued payroll and related expenses	14,195	17,286
Operating lease liabilities	6,523	6,412
Contingent consideration	5,936	5,969
Deferred consideration	42,000	42,000
Convertible Senior Notes	12,777	12,661
Other current liabilities	21,612	14,862
Total current liabilities	136,196	125,891
Operating lease liabilities - non-current	91,571	93,227
Deferred consideration - non-current	111,277	109,382
Contingent consideration - non-current	10,565	10,566
Other non-current liabilities	11,958	11,981
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value per share; 5,000 shares authorized; none issued or outstanding at March 31, 2020 and December 31, 2019	0	0
Common stock, $0.001 par value per share; 97,500 shares authorized; 41,996 and 41,868 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	42	42
Additional paid-in capital	430,499	425,557
Accumulated other comprehensive loss	(263)	(463)
Retained earnings	174,921	134,684
Total stockholders’ equity	605,199	559,820
Total liabilities and stockholders’ equity	$ 966,766	$ 910,867
Preferred stock, par value per share (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Common stock, par value per share (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	97,500,000	97,500,000
Common stock, shares issued (in shares)	41,996,000	41,868,000
Common stock, shares outstanding (in shares)	41,996,000	41,868,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0

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Balance Sheet Account Details

3 Months Ended

Mar. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Balance Sheet Account Details

Balance Sheet Account Details 

Inventories

Inventories are stated at the lower of cost (first-in, first-out) or net realizable value. Inventories consisted of the following (in thousands):

	March 31, 2020		December 31, 2019
Raw materials	$	22,508	$	23,294
Work-in-process (materials, labor and overhead)	19,662		20,514
Finished goods (materials, labor and overhead)	16,538		14,278
Total inventories	$	58,708	$	58,086

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following (in thousands):

	March 31, 2020		December 31, 2019
Other receivables	$	8,645	$	7,857
Prepaid expenses	5,952		4,568
Income taxes receivable	—		2,560
Other	2,258		1,885
Total prepaid expenses and other current assets	$	16,855	$	16,870

Other Current Liabilities

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

	March 31, 2020		December 31, 2019
Customer incentives	$	8,848	$	7,369
Income and other taxes payable	6,783		1,214
Customer deposits	79		1,500
Other	5,902		4,779
Total other current liabilities	$	21,612	$	14,862

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Industry and Geographic Information

3 Months Ended

Mar. 31, 2020

Industry And Geographic Information [Abstract]

Industry and Geographic Information

Industry and Geographic Information

The Company operates in one reportable segment. Sales to customers outside the U.S. represented $41.2 million (24%) and $41.5 million (28%) of total revenue for the three months ended March 31, 2020 and 2019, respectively. As of March 31, 2020 and December 31, 2019, accounts receivable due from foreign customers were $24.1 million and $23.0 million, respectively.

The Company had sales to individual customers in excess of 10% of total revenues, as follows:

	Three Months Ended March 31,
	2020		2019
Customer:
A	21	%	17	%
B	19	%	17	%
C	10	%	7	%
D	10	%	13	%
Total:	60	%	54	%

As of March 31, 2020 and December 31, 2019, accounts receivable from customers with balances due in excess of 10% of total accounts receivable totaled $73.9 million and $67.4 million, respectively.

Consolidated total revenues by product category for the three months ended March 31, 2020 and 2019 were as follows (in thousands):

	Three Months Ended March 31,
	2020		2019
Rapid Immunoassay	$	95,930	$	62,494
Cardiometabolic Immunoassay	53,901		65,872
Specialized Diagnostic Solutions	16,459		13,854
Molecular Diagnostic Solutions	8,363		5,748
Total revenues	$	174,653	$	147,968

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Stockholders' Equity Stock-Based Compensation - Summary of Status of Stock Awards Activity (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Shares
Restricted stock outstanding, non-vested, beginning (in shares) | shares	786
Granted | shares	186
Vested | shares	(60)
Forfeited | shares	(17)
Restricted stock outstanding, non-vested, ending (in shares) | shares	895
Weighted-average grant date fair value
Restricted stock outstanding, non-vested, beginning, weighted average fair value (in USD per share) | $ / shares	$ 41.88
Restricted stock granted, weighted average fair value (in USD per share) | $ / shares	77.53
Restricted stock vested, weighted average fair value (in USD per share) | $ / shares	18.21
Restricted stock forfeited, weighted average far value (in USD per share) | $ / shares	49.85
Restricted stock outstanding, non-vested, ending, weighted average fair value (in USD per share) | $ / shares	$ 50.74

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Debt - Convertible Senior Notes, Additional Information (Details)		3 Months Ended
	Dec. 31, 2019 USD ($)	Mar. 31, 2020 USD ($) d $ / shares	Mar. 31, 2019 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
If-converted amount exceed principal	$ 600,000
Interest expense, debt		$ 200,000	$ 1,000,000.0
Convertible Senior Notes
Debt Instrument [Line Items]
Face amount					$ 172,500,000
Convertible Senior Notes | 3.25% Convertible Senior Notes due 2020
Debt Instrument [Line Items]
Debt issuance cost					5,100,000
Deferred financing costs					$ 4,200,000
Debt instrument, term				6 years
Adjustments to additional paid in capital				$ 900,000
Effective interest rate					6.90%
Conversion ratio		31.1891
Conversion price (in usd per share) | $ / shares		$ 32.06
Number of threshold trading days | d		20
Number of threshold consecutive trading days | d		30
Threshold percentage of stock price trigger		130.00%
Threshold consecutive trading days | d		5
Threshold percentage of stock price trigger		98.00%
Amortization of debt discount (premium)		$ 100,000	500,000
Interest expense		$ 100,000	$ 500,000
Convertible Senior Notes | Convertible Senior Notes | 3.25% Convertible Senior Notes due 2020
Debt Instrument [Line Items]
Stated interest rate		3.25%

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Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Share-based Payment Arrangement, Option, Activity

A summary of the status of stock option activity for the three months ended March 31, 2020 is as follows (in thousands, except price data):

	Shares	Weighted-average exercise price per share
Outstanding at December 31, 2019	944	$	30.63
Granted	121	77.16
Exercised	(65)	21.26
Forfeited	(12)	43.34
Outstanding at March 31, 2020	988	$	36.77

Schedule of Nonvested Share Activity

A summary of the status of restricted stock unit activity for the three months ended March 31, 2020 is as follows (in thousands, except price data):

	Shares	Weighted-average grant date fair value
Non-vested December 31, 2019	786	$	41.88
Granted	186	77.53
Vested	(60)	18.21
Forfeited	(17)	49.85
Non-vested at March 31, 2020	895	$	50.74

Compensation Expense Related to Stock-Based Compensation Plans

The expense related to the Company’s stock-based compensation plans included in the accompanying Consolidated Statements of Income was as follows (in thousands):

	Three Months Ended March 31,
	2020		2019
Cost of sales	$	258	$	280
Research and development	642		565
Sales and marketing	1,297		1,119
General and administrative	1,681		1,624
Total stock-based compensation expense	$	3,878	$	3,588

Estimated Fair Value of Each Stock Option Award

The estimated fair value of each stock option was determined on the date of grant using the Black-Scholes option valuation model with the following weighted-average assumptions for the option grants.

	Three Months Ended March 31,
	2020			2019
Risk-free interest rate	1.35		%	2.51		%
Expected option life (in years)	5.14			5.68
Volatility rate	39		%	39		%
Dividend rate	0		%	0		%
Weighted-average grant date fair value	$	28.24		$	23.67

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Summary of Significant Accounting Policies Summary of Significant Accounting Policies Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Liability, Current	$ 6,523	$ 6,412

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets:
Money Market Funds, at Carrying Value	$ 70,000
Total assets measured at fair value	70,458	$ 321
Liabilities:
Derivative Liability, Current	147	433
Total liabilities measured at fair value	169,925	168,350
Derivative
Assets:
Derivative assets	458	321
Contingent consideration
Liabilities:
Total liabilities measured at fair value	16,501	16,535
Deferred consideration
Liabilities:
Total liabilities measured at fair value	153,277	151,382
Level 1
Assets:
Money Market Funds, at Carrying Value	70,000
Total assets measured at fair value	70,000	0
Liabilities:
Total liabilities measured at fair value	0	0
Level 1 | Derivative
Assets:
Derivative assets	0	0
Level 1 | Contingent consideration
Liabilities:
Total liabilities measured at fair value	0	0
Level 1 | Deferred consideration
Liabilities:
Total liabilities measured at fair value	0	0
Level 2
Assets:
Total assets measured at fair value	458	321
Liabilities:
Total liabilities measured at fair value	153,424	151,815
Level 2 | Derivative
Assets:
Derivative assets	458	321
Liabilities:
Derivative Liability, Current	147	433
Level 2 | Contingent consideration
Liabilities:
Total liabilities measured at fair value	0	0
Level 2 | Deferred consideration
Liabilities:
Total liabilities measured at fair value	153,277	151,382
Level 3
Assets:
Total assets measured at fair value	0	0
Liabilities:
Total liabilities measured at fair value	16,501	16,535
Level 3 | Derivative
Assets:
Derivative assets	0	0
Level 3 | Contingent consideration
Liabilities:
Total liabilities measured at fair value	16,501	16,535
Level 3 | Deferred consideration
Liabilities:
Total liabilities measured at fair value	$ 0	$ 0

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Industry and Geographic Information Industry and Geographic Information - Revenue by Category (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 174,653	$ 147,968
Rapid Immunoassay
Disaggregation of Revenue [Line Items]
Total revenues	95,930	62,494
Cardiometabolic Immunoassay
Disaggregation of Revenue [Line Items]
Total revenues	53,901	65,872
Specialized Diagnostic Solutions
Disaggregation of Revenue [Line Items]
Total revenues	16,459	13,854
Molecular Diagnostic Solutions
Disaggregation of Revenue [Line Items]
Total revenues	$ 8,363	$ 5,748

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Industry and Geographic Information (Tables)

3 Months Ended

Mar. 31, 2020

Industry And Geographic Information [Abstract]

Sales to Individual Customers in Excess of 10% of Total Revenues

The Company had sales to individual customers in excess of 10% of total revenues, as follows:

	Three Months Ended March 31,
	2020		2019
Customer:
A	21	%	17	%
B	19	%	17	%
C	10	%	7	%
D	10	%	13	%
Total:	60	%	54	%

Net Revenues by Product Category

Consolidated total revenues by product category for the three months ended March 31, 2020 and 2019 were as follows (in thousands):

	Three Months Ended March 31,
	2020		2019
Rapid Immunoassay	$	95,930	$	62,494
Cardiometabolic Immunoassay	53,901		65,872
Specialized Diagnostic Solutions	16,459		13,854
Molecular Diagnostic Solutions	8,363		5,748
Total revenues	$	174,653	$	147,968

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Computation of Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 40,237	$ 24,844
Interest expense on Convertible Senior Notes, net of tax	181	791
Net income used for diluted earnings per share, if-converted method	$ 40,418	$ 25,635
Basic weighted-average common shares outstanding	42,056	39,704
Dilutive potential shares issuable from Convertible Senior Notes	410	1,825
Dilutive potential shares issuable from stock options and unvested RSUs	937	1,378
Diluted weighted-average common shares outstanding, if-converted	43,403	42,907
Stock options
Dilutive Securities Included And Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive shares excluded from calculation due to anti-dilutive effect	97	149

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Commitments and Contingencies (Details)		3 Months Ended
	Jan. 05, 2018 building option	Mar. 31, 2020 option
Commitments and Contingencies Disclosure [Abstract]
Sale leaseback transaction, number of buildings | building	3
Number of buildings | building	4
Lessee, sale leaseback, option to extend | option	2
Lessee, sale leaseback, renewal term	5 years
Number of extension | option		3
Variable Interest Entity, Not Primary Beneficiary [Member]
Other Ownership Interests [Line Items]
Ownership Interest		25.00%

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Industry and Geographic Information - Sales to Individual Customers in Excess of 10% of Total Revenues (Details) - Sales - Customer Concentration Risk	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue, Major Customer [Line Items]
Sales percentage	60.00%	54.00%
Customer One [Member]
Revenue, Major Customer [Line Items]
Sales percentage	21.00%	17.00%
Customer B
Revenue, Major Customer [Line Items]
Sales percentage	19.00%	17.00%
Customer C
Revenue, Major Customer [Line Items]
Sales percentage	10.00%	7.00%
Customer D
Revenue, Major Customer [Line Items]
Sales percentage	10.00%	13.00%

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Income Taxes

3 Months Ended

Mar. 31, 2020

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company calculates its interim income tax provision in accordance with Accounting Standards Codification (“ASC”) 270, Interim Reporting, and ASC 740, Accounting for Income Taxes (together, “ASC 740”). At the end of each interim period, the Company estimates its annual effective tax rate and applies that rate to its ordinary quarterly earnings to calculate the tax related to ordinary income. The tax effects for other items that are excluded from ordinary income are discretely calculated and recognized in the period in which they occur.

The Company recognized income tax provisions of $8.6 million and $1.7 million for the three months ended March 31, 2020 and 2019, respectively. The Company’s 18% effective tax rate for the three months ended March 31, 2020 and 6% effective tax rate for the three months ended March 31, 2019 differed from the federal statutory rate of 21% primarily due to the discrete impact of excess tax deductions from stock-based compensation, the benefit from research and development (“R&D”) credits and the benefit from corporate deductions attributable to Foreign Derived Intangible Income (“FDII”).

The Company is subject to periodic audits by domestic and foreign tax authorities. Due to the carryforward of unutilized credits, the Company’s federal tax years from 2009 and forward are subject to examination by the U.S. authorities. The Company’s state and foreign tax years for 2001 and forward are subject to examination by applicable tax authorities. The Company believes that it has appropriate support for the income tax positions taken on its tax returns and that its accruals for tax liabilities are adequate for all open years based on an assessment of many factors, including past experience and interpretations of tax laws applied to the facts of each matter.

The Coronavirus Aid, Relief, and Economic Security Act (CARES Act) was enacted on March 27, 2020. The CARES Act includes, among other things, refundable payroll tax credits, deferment of employer side social security payments and technical amendments regarding the income tax depreciation of qualified improvement property placed in service after December 31, 2017. These amendments allow for retroactive accelerated income tax depreciation on certain of our leasehold improvement assets. We are currently assessing the impact of these provisions to our financial statements.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Leases

We lease administrative, research and development, sales and marketing and manufacturing facilities and certain equipment under various non-cancelable lease agreements. Facility leases generally provide for periodic rent increases, and may contain clauses for rent escalation, renewal options or early termination.

Summers Ridge Lease — The Company leases three of the four buildings that are located on the Summers Ridge Property in San Diego, California with an initial term through January 2033 with options to extend the lease for two additional five-year terms upon satisfaction of certain conditions, which have not been included in the determination of the lease term. The lease is subject to must-take provisions related to one additional building, which will have the same lease term as the three buildings originally leased. The remaining building is subject to the expiration of the lease with its current tenant for which the expiration date is not yet known.

As a result of the relocation of the Company’s headquarters to the Summers Ridge Property, the Company entered into a sublease of its former headquarters building in January 2020, with minimum rent of $2.4 million under the sublease agreement. Lease income for the three months ended March 31, 2020 was $0.1 million.

McKellar Court Lease — In 1999, the Company completed a sale and leaseback transaction of its San Diego facility at McKellar Court to a partnership for which the Company is a 25% limited partner. The partnership is deemed to be a variable interest entity (VIE). The Company is not, however, the primary beneficiary of the VIE as it does not have the power to direct the activities of the partnership and does not have the obligation to absorb losses or receive benefits of the partnership that could potentially be significant to the partnership. The McKellar Court lease ends in December 2020 and contains options to extend the lease for three additional five-year periods, of which one five-year period is included in the determination of the lease term.

Litigation and Other Legal Proceedings

In Beckman Coulter Inc. v. Quidel Corporation, which was filed in the Superior Court for the County of San Diego, California, on November 27, 2017, Beckman Coulter (“Beckman”) alleges that a provision of an agreement between Quidel and Beckman violates state antitrust laws. Our acquisition of the B-type Naturietic Peptide assay business (“BNP Business”) consisted of assets and liabilities relating to a contractual arrangement with Beckman (the “Beckman Agreement”) for the supply of antibodies and other inputs related to, and distribution of, the Triage® BNP Test for the Beckman Coulter Access Family of Immunoassay Systems. The Beckman Agreement further provides that Beckman, for a specified period, cannot research, develop, manufacture or sell an assay for use in the diagnosis of cardiac diseases that measures or detects the presence or absence of BNP or NT-pro-BNP (a related biomarker) (the “Exclusivity Provision”). In the lawsuit, Beckman asserts that this provision violates certain state antitrust laws and is unenforceable. Beckman contends that it has suffered damages due to this provision and seeks a declaration that this provision is void.

On December 7, 2018, the trial court granted a motion by Beckman for summary adjudication, holding that the Exclusivity Provision is void under California law (the “December 7 Order”). On December 18, 2018, the trial court stayed the effect of the December 7 Order pending a decision on a writ petition Quidel intended to file with the Court of Appeal. Quidel filed its writ petition on January 18, 2019, asking the Court of Appeal to review and reverse the December 7 Order. On February 7, 2019, the trial court stayed all the remaining litigation pending the outcome of the writ petition and vacated all deadlines in the case.

On March 14, 2019, the Court of Appeal issued an order to show cause why the relief sought in Quidel’s petition should not be granted. The Court also stayed the December 7 Order pending a further order from the Court of Appeal. On August 29, 2019, the Court of Appeal issued a written decision ruling in Quidel’s favor and overturning the December 7 Order. Beckman challenged the Court of Appeal’s ruling with a petition for rehearing on September 10, 2019, which was denied on September 13, 2019.

On October 1, 2019, Beckman filed a petition for review of the Court of Appeal’s ruling with the Supreme Court of California (the “Supreme Court”). We subsequently filed an answer to Beckman’s petition, Beckman filed a response to our reply and on November 13, 2019, the Supreme Court granted review of the Court of Appeal ruling, with further action in this matter being deferred pending consideration and disposition of a related issue in Ixchel Pharma v. Biogen, or pending further order of the Supreme Court.

On November 22, 2019, the trial court continued the stay at the trial court level and scheduled a status conference for December 11, 2020.

Quidel denies that the Exclusivity Provision is unlawful, denies any liability with respect to this matter, and intends to vigorously defend itself. There are multiple factors that prevent us from being able to estimate the amount of loss, if any, that may result from this matter including: (1) we are vigorously defending ourselves and believe that we have a number of meritorious legal defenses; (2) there are unresolved questions of law and fact that could be important to the ultimate resolution of this matter, some of which are subject to review by the Supreme Court; and (3) discovery is ongoing. Accordingly, at this time, we are not able to estimate a possible loss or range of loss that may result from this matter or to determine whether such loss, if any, would have a material adverse effect on our financial condition, results of operations or liquidity.

From time to time, the Company is involved in other litigation and proceedings, including matters related to product liability claims, commercial disputes and intellectual property claims, as well as regulatory, employment, and other claims related to our business. The Company accrues for legal claims when, and to the extent that, amounts associated with the claims become probable and are reasonably estimable. The actual costs of resolving legal claims may be substantially higher or lower than the amounts accrued for those claims. For those matters as to which we are not able to estimate a possible loss or range of loss, we are not able to determine whether the loss will have a material adverse effect on our business, financial condition or results of operations or liquidity. No accrual has been recorded as of December 31, 2019 and December 31, 2018 related to such matters as they are not probable and/or reasonably estimable.

Management believes that all such current legal actions, in the aggregate, will not have a material adverse effect on the Company. However, the resolution of, or increase in any accruals for, one or more matters may have a material adverse effect on the Company’s results of operations and cash flows.

The Company also maintains insurance, including coverage for product liability claims, in amounts that management believes are appropriate given the nature of its business.

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
OPERATING ACTIVITIES:
Net income	$ 40,237	$ 24,844
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and other	12,480	11,971
Stock-based compensation expense	3,878	3,588
Amortization of debt discount and deferred issuance costs	217	602
Accretion of interest on deferred consideration	1,895	2,343
Change in deferred tax assets and liabilities	78	0
Changes in assets and liabilities:
Accounts receivable	(7,737)	(10,682)
Inventories	(602)	682
Prepaid expenses and other current and non-current assets	321	3,995
Accounts payable	6,639	1,802
Accrued payroll and related expenses	(2,860)	(6,969)
Other current and non-current liabilities	6,634	721
Net cash provided by operating activities:	61,180	32,897
INVESTING ACTIVITIES:
Acquisitions of property, equipment and intangibles	(5,884)	(4,993)
Net cash used for investing activities:	(5,884)	(4,993)
FINANCING ACTIVITIES:
Proceeds from issuance of common stock	2,805	6,847
Payments on Revolving Credit Facility	(112)	(38)
Payments on finance lease obligation	0	(20,000)
Repurchases of common stock	(1,954)	(1,476)
Payments of acquisition contingent consideration	(34)	(12)
Net cash provided by (used for) financing activities:	705	(14,679)
Effect of exchange rates on cash	(6)	18
Net increase in cash and cash equivalents	55,995	13,243
Cash and cash equivalents, beginning of period	52,775	43,695
Cash and cash equivalents, end of period	108,770	56,938
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Purchase of property, equipment and intangibles by incurring current liabilities	860	1,728
Reduction of other current liabilities upon issuance of restricted share units	$ 767	$ 1,970

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Computation of Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table reconciles net income and the weighted-average shares used in computing basic and diluted earnings per share (in thousands):

	Three Months Ended March 31,
	2020		2019
Numerator:
Net income used for basic earnings per share	$	40,237	$	24,844
Interest expense on Convertible Senior Notes, net of tax	181		791
Net income used for diluted earnings per share, if-converted method	$	40,418	$	25,635
Basic weighted-average common shares outstanding	42,056		39,704
Dilutive potential shares issuable from Convertible Senior Notes	410		1,825
Dilutive potential shares issuable from stock options and unvested RSUs	937		1,378
Diluted weighted-average common shares outstanding, if-converted	43,403		42,907
Potentially dilutive shares excluded from calculation due to anti-dilutive effect	97		149

Potentially dilutive shares excluded from the calculation above represent stock options when the combined exercise price and unrecognized stock-based compensation are greater than the average market price for the Company’s common stock because their effect is anti-dilutive.

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Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Preferred stock, par value per share (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value per share (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	97,500,000	97,500,000
Common stock, shares issued (in shares)	41,996,000	41,868,000
Common stock, shares outstanding (in shares)	41,996,000	41,868,000

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Stockholders' Equity Stock-Based Compensation - Summary of Status of Stock Option Activity (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Shares
Stock options outstanding, beginning (in shares) | shares	944
Granted | shares	121
Exercised | shares	(65)
Stock options cancelled (in shares) | shares	(12)
Stock options outstanding, ending (in shares) | shares	988
Weighted-average exercise price per share
Stock options outstanding beginning, weighted average exercise price (in USD per share) | $ / shares	$ 30.63
Stock options granted, weighted average exercise price (in USD per share) | $ / shares	77.16
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price | $ / shares	21.26
Stock options cancelled, weighted average exercise price (in USD per share) | $ / shares	43.34
Stock options outstanding ending, weighted average exercise price (in USD per share) | $ / shares	$ 36.77

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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 8,584	$ 1,727
Effective income tax rate	18.00%	6.00%