UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 ____________________________________________________________________________
FORM 10-Q
  ____________________________________________________________________________
(Mark One)
xQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended September 30, 2018March 31, 2019
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.)
12544 High Bluff Drive, Suite 200, San Diego, California 92130
(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 classTrading Symbol(s)Name of each exchange on which registered
Common Stock, $0.001 Par ValueQDELNASDAQ Global 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  x    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  x    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
x

 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 SecuritiesExchange Act.¨
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x
As of November 1, 2018, 39,337,111May 3, 2019, 39,817,679 shares of the registrant'sregistrant’s common stock were outstanding.
 

INDEX
 
 
 
 


PART I    FINANCIAL INFORMATION
 
ITEM 1.    Financial Statements
                     QUIDEL CORPORATION
CONSOLIDATED BALANCE SHEETS
(in thousands, except par value; unaudited)
September 30, 2018 December 31, 2017March 31,
2019
 December 31,
2018
ASSETS      
Current assets:      
Cash and cash equivalents$38,694
 $36,086
$56,938
 $43,695
Accounts receivable, net66,845
 67,046
69,234
 58,677
Inventories63,309
 67,078
66,647
 67,379
Assets held for sale
 146,644
Prepaid expenses and other current assets31,301
 14,375
18,823
 23,646
Total current assets200,149
 331,229
211,642
 193,397
Property, plant and equipment, net70,235
 61,585
75,356
 73,901
Right-of-use assets85,907
 
Goodwill337,025
 337,028
337,019
 337,021
Intangible assets, net181,985
 203,827
168,120
 175,029
Deferred tax asset—non-current22,102
 22,192
Other non-current assets4,490
 1,582
5,709
 4,831
Total assets$793,884
 $935,251
$905,855
 $806,371
LIABILITIES AND STOCKHOLDERS’ EQUITY      
Current liabilities:      
Accounts payable$25,700
 $27,279
$26,827
 $25,171
Accrued payroll and related expenses17,118
 15,926
10,969
 19,210
Current portion of operating lease liabilities5,385
 
Current portion of contingent consideration3,848
 6,293
3,971
 3,983
Current portion of deferred consideration44,000
 46,000
44,000
 44,000
Current portion of Revolving Credit Facility
 10,000
Current portion of Convertible Senior Notes53,885
 
54,880
 54,379
Current portion of Term Loan
 10,184
Other current liabilities13,898
 12,666
13,521
 12,992
Total current liabilities158,449
 128,348
159,553
 159,735
Convertible Senior Notes
 149,868
Term Loan
 227,394
Operating lease liabilities83,818
 
Revolving Credit Facility83,188
 
33,188
 53,188
Deferred consideration140,845
 177,158
145,501
 143,158
Contingent consideration14,904
 18,008
15,129
 15,129
Other non-current liabilities8,044
 7,371
7,968
 9,577
Commitments and contingencies (see Note 9)
 
Commitments and contingencies (see Note 8)
 
Stockholders’ equity:      
Preferred stock, $.001 par value per share; 5,000 shares authorized; none issued or outstanding at September 30, 2018 and December 31, 2017
 
Common stock, $.001 par value per share; 97,500 shares authorized; 39,326 and 34,540 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively39
 35
Preferred stock, $.001 par value per share; 5,000 shares authorized; none issued or outstanding at March 31, 2019 and December 31, 2018
 
Common stock, $.001 par value per share; 97,500 shares authorized; 39,806 and 39,386 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively40
 39
Additional paid-in capital359,186
 239,489
374,148
 363,921
Accumulated other comprehensive loss(55) 
(97) (139)
Retained earnings (accumulated deficit)29,284
 (12,420)
Retained earnings86,607
 61,763
Total stockholders’ equity388,454
 227,104
460,698
 425,584
Total liabilities and stockholders’ equity$793,884
 $935,251
$905,855
 $806,371
See accompanying notes.

QUIDEL CORPORATION
CONSOLIDATED STATEMENTS OF OPERATIONSINCOME
(in thousands, except per share data; unaudited)
 
Three months ended 
 September 30,
 Nine months ended 
 September 30,
Three months ended 
 March 31,
2018 2017 2018 20172019 2018
Total revenues$117,399
 $50,894
 $389,697
 $162,853
$147,968
 $169,143
Cost of sales47,757
 21,204
 156,116
 65,838
57,041
 62,872
Gross profit69,642
 29,690
 233,581
 97,015
90,927
 106,271
Research and development13,103
 7,468
 39,008
 22,970
13,930
 12,621
Sales and marketing26,504
 13,588
 82,607
 40,875
29,589
 28,558
General and administrative10,620
 6,580
 32,652
 20,483
13,431
 10,532
Acquisition and integration costs2,521
 4,591
 10,923
 7,022
2,824
 3,467
Total operating expenses52,748
 32,227
 165,190
 91,350
59,774
 55,178
Operating income (loss)16,894
 (2,537) 68,391
 5,665
Operating income31,153
 51,093
Other expense, net:          
Interest expense, net(4,786) (2,784) (19,475) (8,387)(4,582) (7,850)
Loss on extinguishment of debt(1,297) 
 (8,262) 

 (4,567)
Total other expense, net(6,083) (2,784) (27,737) (8,387)(4,582) (12,417)
Income (loss) before income taxes10,811
 (5,321) 40,654
 (2,722)
(Benefit) provision for income taxes(11) 204
 (1,050) 355
Net income (loss)$10,822
 $(5,525) $41,704
 $(3,077)
Basic earnings (loss) per share$0.28
 $(0.16) $1.11
 $(0.09)
Diluted earnings (loss) per share$0.27
 $(0.16) $1.08
 $(0.09)
Income before income taxes26,571
 38,676
Provision for income taxes1,727
 4,718
Net income$24,844
 $33,958
Basic earnings per share$0.63
 $0.96
Diluted earnings per share$0.60
 $0.86
Shares used in basic per share calculation39,290
 33,913
 37,490
 33,538
39,704
 35,236
Shares used in diluted per share calculation42,889
 33,913
 42,467
 33,538
42,907
 41,948
See accompanying notes.


QUIDEL CORPORATION
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
(in thousands; unaudited)
 
 Three months ended 
 September 30,
 Nine months ended 
 September 30,
 2018 2017 2018 2017
Net income (loss)$10,822
 $(5,525) $41,704
 $(3,077)
Other comprehensive (loss) income, net of tax       
Changes in cumulative translation adjustment(61) 14
 (55) 49
Comprehensive income (loss)$10,761
 $(5,511) $41,649
 $(3,028)
 Three months ended 
 March 31,
 2019 2018
Net income$24,844
 $33,958
Changes in cumulative translation adjustment, net of tax(248) 20
Change in fair value of cash flow hedges, net of tax290
 
Comprehensive income$24,886
 $33,978
See accompanying notes.


QUIDEL CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands; unaudited)

 Nine months ended September 30,
 2018 2017
OPERATING ACTIVITIES:   
Net income (loss)$41,704
 $(3,077)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:   
Depreciation, amortization and other34,323
 17,813
Stock-based compensation expense9,190
 5,938
Amortization of debt discount and deferred issuance costs3,355
 4,129
Change in fair value of acquisition contingencies745
 
Accretion of interest on deferred consideration7,686
 
Amortization of inventory step-up to fair value3,650
 
Change in deferred tax assets and liabilities
 101
Loss on extinguishment of debt8,262
 
Changes in assets and liabilities:   
Accounts receivable257
 (16,582)
Inventories155
 2,751
Income taxes receivable(6,802) (1,123)
Prepaid expenses and other current and non-current assets(13,526) (667)
Accounts payable633
 2,128
Accrued payroll and related expenses(24) 982
Other current and non-current liabilities3,520
 4,091
Net cash provided by operating activities:93,128
 16,484
INVESTING ACTIVITIES:   
Acquisitions of property, equipment and intangibles(22,875) (12,767)
Acquisition of other businesses, net of cash acquired
 (14,388)
Proceeds from sale of Summers Ridge Property146,644
 
Net cash provided by (used for) investing activities:123,769
 (27,155)
FINANCING ACTIVITIES:   
Proceeds from issuance of common stock16,031
 15,246
Payment of debt issuance costs(513) 
Payments on Revolving Credit Facility(10,000) 
Payments on lease obligation(93) (70)
Repurchases of common stock(3,790) (541)
Payments on acquisition contingent consideration(6,294) (498)
Payments of deferred consideration(46,000) 
Payments of Term Loan(161,813) 
Transaction costs related to debt exchange(2,002) 
Net cash (used for) provided by financing activities:(214,474) 14,137
Effect of exchange rates on cash185
 20
Net increase in cash and cash equivalents2,608
 3,486
Cash and cash equivalents, beginning of period36,086
 169,508
Cash and cash equivalents, end of period$38,694
 $172,994
QUIDEL CORPORATION
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Purchase of property, equipment and intangibles by incurring current liabilities$1,650
 $653
Reduction of other current liabilities upon issuance of restricted share units$
 $903
Extinguishment of Convertible Senior Notes through issuance of common stock$200,217
 $
Principal amount of Term Loan exchanged for Revolving Credit Facility$83,188
 $
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, 201839,386
 $39
 $363,921
 $(139) $61,763
 $425,584
Issuance of common stock under equity compensation plans444
 1
 8,816
 
 
 8,817
Stock-based compensation expense
 
 2,887
 
 
 2,887
Repurchases of common stock(24) 
 (1,476) 
 
 (1,476)
Changes in cumulative translation adjustment, net of tax
 
 
 (248) 
 (248)
Change in fair value of cash flow hedges, net of tax
 
 
 290
 
 290
Net income
 
 
 
 24,844
 24,844
Balance at March 31, 201939,806
 $40
 $374,148
 $(97) $86,607
 $460,698


 Common Stock      
 Shares Par 
Additional
paid-in
capital
 
Accumulated
other
comprehensive income
 
Retained
earnings (accumulated
deficit)
 
Total
stockholders’
equity
Balance at December 31, 201734,540
 $35
 $239,489
 $
 $(12,420) $227,104
Issuance of common stock under equity compensation plans516
 
 5,652
 
 
 5,652
Stock-based compensation expense
 
 2,936
 
 
 2,936
Issuance of shares in exchange for Convertible Senior Notes2,428
 2
 118,073
 
 
 118,075
Reduction for equity component of Convertible Senior Notes exchanged
 
 (53,867) 
 
 (53,867)
Repurchases of common stock(73) 
 (3,232) 
 
 (3,232)
Changes in cumulative translation adjustment, net of tax
 
 
 20
 
 20
Net income
 
 
 
 33,958
 33,958
Balance at March 31, 201837,411
 $37
 $309,051
 $20
 $21,538
 $330,646


QUIDEL CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands; unaudited)
 Three months ended 
 March 31,
 2019 2018
OPERATING ACTIVITIES:   
Net income$24,844
 $33,958
Adjustments to reconcile net income to net cash provided by operating activities:   
Depreciation, amortization and other11,971
 12,075
Stock-based compensation expense3,588
 2,936
Amortization of debt discount and deferred issuance costs602
 1,671
Accretion of interest on deferred consideration2,343
 2,793
Amortization of inventory step-up to fair value
 3,650
Loss on extinguishment of debt
 4,567
Changes in assets and liabilities:   
Accounts receivable(10,682) (25,205)
Inventories682
 5,471
Prepaid expenses and other current and non-current assets3,995
 (1,842)
Accounts payable1,802
 (595)
Accrued payroll and related expenses(6,969) (5,988)
Other current and non-current liabilities721
 2,323
Net cash provided by operating activities:32,897
 35,814
INVESTING ACTIVITIES:   
Acquisitions of property and equipment(4,993) (4,949)
Proceeds from sale of Summers Ridge Property
 146,644
Net cash (used for) provided by investing activities:(4,993) 141,695
FINANCING ACTIVITIES:   
Proceeds from issuance of common stock6,847
 5,652
Payments on Revolving Credit Facility(20,000) (10,000)
Payments on finance lease obligation(38) (29)
Repurchases of common stock(1,476) (3,232)
Payments of acquisition contingent consideration(12) (1,017)
Payments of Term Loan
 (101,813)
Transaction costs related to debt exchange
 (1,357)
Net cash used for financing activities:(14,679) (111,796)
Effect of exchange rates on cash18
 13
Net increase in cash and cash equivalents13,243
 65,726
Cash and cash equivalents, beginning of period43,695
 36,086
Cash and cash equivalents, end of period$56,938
 $101,812
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Purchase of property and equipment by incurring current liabilities$1,728
 $2,067
NON-CASH FINANCING ACTIVITIES:   
Reduction of other current liabilities upon issuance of restricted share units$1,970
 $
Extinguishment of Convertible Senior Notes through issuance of common stock$
 $118,075
See accompanying notes.

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 September 30, 2018,March 31, 2019, and for the three and nine months ended September 30,March 31, 2019 and 2018, and 2017, is unaudited. For further information, refer to the Company’s consolidated financial statements and notes thereto for the year ended December 31, 20172018 included in the Company’s 20172018 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 20182019 and 2017,2018, the Company’s fiscal year will end or has ended on December 29, 2019 and December 30, 2018, and December 31, 2017, respectively. For 20182019 and 2017,2018, the Company’s thirdfirst quarter ended on September 30,March 31, 2019 and April 1, 2018, and October 1, 2017, respectively. For ease of reference, the calendar quarter end dates are used herein. The three and nine monththree-month periods ended September 30,March 31, 2019 and 2018 and 2017 each included 13 and 39 weeks, respectively.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 and nine months ended September 30, 2018, 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, 2017, except as described below.
Revenue Recognition
The Company records revenues primarily from product sales. These revenues are recorded net of rebates and other discounts. These rebates and discounts are estimated at the time of sale, and are largely driven by various customer program offerings, including special pricing agreements, promotions and other volume-based incentives. Revenue is recognized when control of the products is transferred to the customers in an amount that reflects the consideration the Company expects to receive from the customers in exchange for those products and services. This process involves identifying the contract with a customer, determining the performance obligations in the contract and the contract price, allocating the contract price to the distinct performance obligations in the contract and recognizing revenue when the performance obligations have been satisfied. A performance obligation is considered distinct from other obligations in a contract when it provides a benefit to the customer either on its own or together with other resources that are readily available to the customer and is separately identified in the contract. A performance obligation is considered to be satisfied once the control of a product is transferred to the customer or the service is provided to the customer, meaning the customer has the ability to use and obtain the benefit of the good or service. The Company recognizes revenue for satisfied performance obligations only when there are no uncertainties regarding payment terms or transfer of control.
A portion of product sales includes revenues for diagnostic kits, which are utilized on leased instrument systems under the Company’s “reagent rental” program. The reagent rental program provides customers the right to use the instruments at no separate cost to the customer in consideration for a multi-year agreement to purchase annual minimum amounts of consumables (“reagents” or “diagnostic kits”). When an instrument is placed with a customer under a reagent rental agreement, the Company

retains title to the equipment and it remains capitalized on the Company’s Consolidated Balance Sheets as property, plant and equipment, net. The instrument is depreciated on a straight-line basis over the lower of the lease term or life of the instrument. Depreciation expense is recorded in cost of sales included in the Consolidated Statements of Operations. Instrument and consumables under the reagent rental agreements are deemed two distinct performance obligations. Though the instrument and consumables do not have any use to customers without one another, they are not highly interdependent because they do not significantly affect each other. The Company would be able to fulfill its promise to transfer the instrument even if its customers did not purchase any consumables and the Company would be able to fulfill its promise to provide the consumables even if customers acquired instruments separately. The contract price is allocated between these two performance obligations based on the relative standalone selling prices. The instrument is considered an operating lease and revenue allocated to the instrument will be separately disclosed, if material.
Reclassifications
The Company recorded a reclassification of $1.8 million and $5.1 million for the three and nine months ended September 30, 2017 from amortization of intangible assets from acquired businesses and technology to cost of sales expense as previously reported in the Consolidated Statements of Operations. In addition, the Company recorded a reclassification of $0.7 million and $2.1 million for the three and nine months ended September 30, 2017 from amortization of intangible assets from acquired businesses and technology to sales and marketing expense to conform to current year presentation. These reclassifications did not impact the net income (loss) as previously reported or any prior amounts reported on the Consolidated Balance Sheets, Statements of Cash Flows or Statements of Comprehensive Income (Loss).
Recent Accounting Pronouncements
In May 2014, the Financial Accounting Standards Board (“FASB”) issued guidance codified in Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers, which amends the guidance in former ASC 605, Revenue Recognition (“2016-02 and ASU 2014-09”). The standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies are required to use more judgment and make more estimates than under prior authoritative guidance. These may include identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. The FASB has issued several amendments to the new standard, which include clarification of accounting guidance related to identification of performance obligations, intellectual property licenses and principal vs. agent considerations. ASU 2014-09 and all subsequent amendments2018-11 (collectively, “ASC 606”842”) were effective for public entities for annual reporting periods beginning after December 15, 2017, including interim periods therein.
The Company adopted ASC 606 on January 1, 2018, using the modified retrospective transition method applied to those contracts which were not completed as of that date. The cumulative effect of applying the new revenue standard to all incomplete contracts as of January 1, 2018 was not material and, therefore, did not result in an adjustment to retained earnings. The adoption of ASC 606 did not have a material impact on the Company's consolidated financial position, results of operations, equity or cash flows as of the adoption date or for the three and nine months ended September 30, 2018.
In February 2016, the FASB issued guidance codified in ASU 2016-02 (Topic 842), Leases. The guidance requires a lessee to recognize a lease liability for the obligation to make lease payments and a right-to-useROU asset representing the right to use the underlying asset for the lease term on the balance sheet. Deferred rent, recorded in other current liabilities and other non-current liabilities, is derecognized. The guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those years. Under ASU 2016-02,Company adopted ASC 842 as of January 1, 2019 using the standard will be adopted on a modified retrospectivealternative transition basis for leases existing at, or entered into after,method to apply the beginningguidance. The Company elected the package of practical expedients which, among other things, allows the Company to carry forward its historical lease classifications.
The following table presents the effect of the earliest comparative period presentedchange in the financial statements. The FASB issued ASU 2018-11 in July 2018 which allows for an alternative method to adopt the lease standard by recognizing a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. While the Company is continuing to assess the effects of adoption, the Company believes the new standard will have a material effectaccounting principle on the consolidated financial statements and disclosures. We expect substantially all real-estate operating lease commitments to be recognizedCompany’s Consolidated Balance Sheets as lease liabilities with corresponding right-of-use assets upon adoption, resulting in a significant increase in the assets and liabilities on the consolidated balance sheet. The Company is currently evaluating the impact of Topic 842 on the consolidated financial statements as it relates to other aspects of its business.January 1, 2019:
Consolidated Balance Sheet (in thousands)January 1,
2019
 Effect of Change in Accounting Principle After change in Accounting Principle
ASSETS     
Operating lease right-of-use asset$
 $87,086
 $87,086
Total assets$806,371
 $87,086
 $893,457
      
LIABILITIES AND STOCKHOLDERS’ EQUITY     
Current portion of operating lease liability$
 $5,290
 $5,290
Other current liabilities12,992
 (448) 12,544
Total current liabilities159,735
 4,842
 164,577
Operating lease liability
 84,866
 84,866
Other non-current liabilities9,577
 (2,622) 6,955
Total liabilities and stockholders’ equity$806,371
 $87,086
 $893,457

In January 2017, the FASBFinancial Accounting Standards Board (“FASB”) issued guidance codified in ASU 2017-04, Intangibles-Goodwill and Other (Topic 350) Simplifying the Test for Goodwill Impairment (“ASU 2017-04”). Under this new guidance, an entity will no longer determine goodwill impairment by calculating the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit had been acquired in a business combination. Instead, an entity will compare the

fair value of a reporting unit with its carrying amount and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit'sunit’s fair value. The Company adopted the guidance during the three months ended March 31, 2019 with no impact to the Company’s consolidated financial statements.
In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments, which amends the impairment model by requiring entities to use a forward-looking approach based on expected losses to estimate credit losses on certain types of financial instruments, including trade receivables. The standard is effective for fiscal yearsthe Company beginning after December 15, 2019 including interim periods therein. The Company is currently evaluating the impact of this guidance and expects to adopt the standard in the first quarter of 2020.2020, with early adoption permitted. We are currently evaluating the expected impact of ASU 2016-13 on our consolidated financial statements.
Significant Accounting Policies
During the three months ended March 31, 2019, 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, 2018 except as described below and in Note 10. Derivatives and Hedging.
Leases - Lease liabilities represent the obligation to make lease payments and right-of-use (“ROU”) assets represent the right to use the underlying asset during the lease term. Lease liabilities and ROU assets are recognized at the commencement date of the lease based on the present value of lease payments over the lease term at the commencement date. When the implicit rate is unknown, an incremental borrowing rate based on the information available at the commencement date is used in determining the present value of the lease payments. Options to extend or terminate the lease are included in the determination of the lease term when it is reasonably certain that the Company will exercise such options.
For certain classes of assets, the Company accounts for lease and non-lease components as a single lease component. Variable lease payments, including those related to changes in the consumer price index, are recognized in the period in which the obligation for those payments are incurred and are not included in the measurement of the ROU assets or lease liabilities. Short-term leases are excluded from the calculation of the ROU assets and lease liabilities.
Operating leases are included in operating lease ROU assets, current portion of operating lease liabilities and operating lease liabilities in the Consolidated Balance Sheet. Finance leases are included in property and equipment, other current liabilities and other non-current liabilities.
Note 2. Computation of Earnings (Loss) Per Share
Basic earnings (loss) per share ("EPS"(“EPS”) is computed by dividing net income (loss) 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 (loss).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 September 30, 2018. The Senior Convertible Notes were not convertible during the nine months ended September 30, 2017.March 31, 2019.

The following table reconciles net income (loss) and the weighted-average shares used in computing basic and diluted earnings per share in the respective periods (in thousands):
Three month ended September 30, Nine months ended September 30,Three months ended 
 March 31,
2018 2017 2018 20172019 2018
Numerator:          
Net income (loss) used for basic earnings per share$10,822
 $(5,525) $41,704
 $(3,077)
Net income used for basic earnings per share$24,844
 $33,958
Interest expense on Convertible Senior Notes, net of tax791
 
 4,152
 
791
 2,144
Net income (loss) used for diluted earnings per share, if-converted method$11,613
 $(5,525) $45,856
 $(3,077)
Net income used for diluted earnings per share, if-converted method$25,635
 $36,102
          
Basic weighted-average common shares outstanding39,290
 33,913
 37,490
 33,538
39,704
 35,236
Potentially dilutive shares issuable from Convertible Senior Notes, if-converted1,825
 
 3,193
 
1,825
 4,957
Potentially dilutive shares issuable from stock options and unvested RSUs1,774
 
 1,784
 
1,378
 1,755
Diluted weighted-average common shares outstanding, if-converted42,889
 33,913
 42,467
 33,538
42,907
 41,948
Potentially dilutive shares excluded from calculation due to anti-dilutive effect
 
 161
 1,121
149
 193
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.     
The number of potentially dilutive shares issuable under the Convertible Senior Notes that would have been included in the diluted EPS calculation if the Company had earnings amounted to 1.8 million shares and 1.2 million shares for the three and nine months ended September 30, 2017, respectively.

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 at September 30, 2018March 31, 2019 and December 31, 2017,2018, respectively (in thousands):
September 30, 2018 December 31, 2017March 31,
2019
 December 31,
2018
Raw materials$23,572
 $22,252
$24,783
 $24,292
Work-in-process (materials, labor and overhead)20,915
 22,813
20,860
 21,280
Finished goods (materials, labor and overhead)18,822
 22,013
21,004
 21,807
Total inventories$63,309
 $67,078
$66,647
 $67,379
Note 4.Prepaid Expenses and Other Balance Sheet Accounts    Current Assets
Prepaid expenses and other current assets consist of the following (in thousands):
September 30, 2018 December 31, 2017March 31,
2019
 December 31,
2018
Receivables under transition service agreements$14,288
 $7,509
$9,192
 $15,507
Income taxes receivable10,593
 3,806
2,703
 2,703
Prepaid expenses5,615
 2,898
5,375
 4,508
Other805
 162
1,553
 928
Total prepaid expenses and other current assets$31,301
 $14,375
$18,823
 $23,646

Other Current Liabilities
Other current liabilities consist of the following (in thousands):
September 30, 2018 December 31, 2017March 31,
2019
 December 31,
2018
Customer incentives$8,955
 $7,165
$5,778
 $7,516
Accrued interest855
 442
690
 347
Other4,088
 5,059
7,053
 5,129
Total other current liabilities$13,898
 $12,666
$13,521
 $12,992
Note 5.4. Income Taxes
The Company calculates its interim income tax provision in accordance with ASCAccounting 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.
On December 22, 2017, the Tax Cuts and Jobs Act (the "Tax Act"“Tax Act”) was enacted into legislation, which includes a broad range of provisions affecting businesses. The Tax Act significantly revisesrevised how companies compute their U.S. corporate tax liability by, among other provisions, reducing the corporate tax rate from 35% to 21% for tax years beginning after December 31, 2017, implementing a territorial tax system, and requiring a mandatory one-time tax on U.S.-owned undistributed foreign earnings and profits known as the transition tax.
For the three months ended September 30, 2018, the Company recognized an insignificant amount of income tax benefit. For the three months ended September 30, 2017, the Company recognized an income tax expense of $0.2 million. The Company recognized income tax benefitexpense of $1.1$1.7 million and income tax expense of $0.4$4.7 million for the ninethree months ended September 30,March 31, 2019 and 2018, and 2017, respectively. The incomeCompany’s 6% effective tax benefitrate for the three months ended March 31, 2019 differed from the federal statutory rate of 21% due to the discrete impact of excess tax deductions from stock-based compensation and nine month periodsthe benefit from corporate deductions attributable to Foreign Derived Intangible Income (“FDII”). The Company’s 12% effective tax rate for the three months ended September 30,March 31, 2018 differed from the income tax expense for the same periods in prior yearfederal statutory rate of 21% due primarily to the reduction inprojected impact to the Company’s valuation allowance from utilization of deferred tax assets shielding its tax liability, the tax rate from the Tax Act, the impacts of the Company's full valuation allowance on U.S. earnings and higher discrete tax benefitsbenefit recorded during the 2018 periods for excess tax benefits of stock-based compensation.compensation, and the benefit from corporate deduction attributable to FDII.
The Company is subject to periodic audits by domestic and foreign tax authorities. Due to the carryforward of unutilized net operating loss and credit carryovers, the Company'sCompany’s federal tax years from 2009 and forward are subject to examination by

the U.S. authorities. The Company'sCompany’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.
On December 22, 2017, the Securities and Exchange Commissions issued Staff Accounting Bulletin No. 118 (“SAB 118”) to address the application of U.S. GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Tax Act. As of December 31, 2017, the Company was able to reasonably estimate certain effects of the Tax Act and, therefore, recorded provisional adjustments associated with the deemed repatriation transition tax and rate change revaluation of its deferred tax assets. During the nine months ended September 30, 2018, the Company has made additional provisional measurement-period adjustments related to the Tax Act for which clarifying legislation has been enacted. The primary impact of the measurement period adjustments resulted in a decrease to the Company's net operating loss carryforward as of December 31, 2017, offset by the Company's full evaluation allowance. The Company is still waiting for relevant guidance related to provisions in the Tax Act; therefore, the Company does not consider the measurement period closed as of September 30, 2018. The Company will continue to assess the impact of anticipated IRS guidance when issued, and plans to complete the accounting for the Tax Act within the prescribed measurement period. Any subsequent adjustment to the amounts previously recorded in 2017 (the period of enactment of the Tax Act) will be a tax expense or benefit in the fourth quarter of 2018 when the analysis is complete.
Note 6.5. 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). The conversion will occur 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 thirdfirst quarter of 2018,2019, 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 September 30, 2018.March 31, 2019. If the Convertible Senior Notes were converted as of September 30, 2018,March 31, 2019, the if-converted amount would exceed the principal by $2.2$1.7 million. The Convertible Senior Notes may be settled at the Company'sCompany’s option in cash or a combination of cash and shares of common stock. Because the settlement could be in cash, the Convertible Senior Notes have been classified as short-term debt as of September 30, 2018.

During the first and second quarters of 2018, the Company entered into separate, privately negotiated exchange agreements with certain holders of the notes. During the third quarter of 2018, certain note holders requested conversion and the Company elected to issue shares of common stock in exchange for the notes. To measure the resulting loss as of the settlement dates, the applicable interest rates were estimated using Level 2 observable inputs and applied to the converted notes using the same methodology as in the issuance date valuation. The following table summarizes information about the settlement of the Convertible Senior Notes (in thousands).
 Three month ended September 30, 2018 Nine months ended September 30, 2018
Principal amount settled$35
 $108,808
Number of shares of common stock issued1
 3,699
Loss on extinguishment of debt$
 $2,303
March 31, 2019.
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 ninethree months ended September 30, 2018,March 31, 2019, the Company recorded total interest expense of $5.2$1.0 million related to the Convertible Senior Notes, of which $2.7$0.5 million related to the amortization of the debt discount and issuance costs and $2.5$0.5 million related to the coupon due semi-annually. During the ninethree months ended September 30, 2017,March 31, 2018, the Company recorded total interest expense of $8.2$2.6 million related to the Convertible Senior Notes of which $4.1$1.3 million related to the amortization of the debt discount and issuance costs and $4.1$1.3 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.
September 30, 2018 December 31, 2017March 31,
2019
 December 31,
2018
Principal amount outstanding$58,506
 $167,314
$58,503
 $58,503
Unamortized discount of liability component(4,075) (15,356)(3,195) (3,637)
Unamortized debt issuance costs(546) (2,090)(428) (487)
Net carrying amount of liability component53,885
 149,868
54,880
 54,379
Less: current portion(53,885) 
(54,880) (54,379)
Long-term debt$
 $149,868
$
 $
Carrying value of equity component, net of issuance costs$10,093
 $29,211
$10,092
 $10,092
Fair value of outstanding Convertible Senior Notes$118,767
 $257,245
$119,767
 $85,999
Remaining amortization period of discount on the liability component2.3 years
 3.0 years
1.8 years
 2.0 years
Senior Credit Agreement
On October 6, 2017, the Company entered into a Credit Agreement (the “Credit Agreement”), which provided the Company with a $245.0 million senior secured term loan facility (the “Term Loan”) and a $25.0 million Revolving Credit Facility ("Revolving Credit Facility") together (the “Senior Credit Facility”). On the closing date of the Credit Agreement, the Company borrowed the entire amount of the Term Loan and $10.0 million under the Revolving Credit Facility.
During the nine months ended September 30, 2018, the Company used cash on hand of $161.8 million to pay down a portion of the existing Term Loan. Separately, the Company also repaid the entire outstanding $10.0 million balance on its Revolving Credit Facility under the Credit Agreement.
On August 31, 2018, the Company entered into an Amended and Restated Credit Agreement ("Amended and Restated Credit Agreement"(the “Credit Agreement”) to replace the prior Credit Agreement. The Amended and Restated Credit Agreementwhich provides the Company with a $175.0 million Revolving Credit Facility. In connection with the closing of the Amended and Restated Credit Agreement, the Company borrowed $83.2 millionThe balance outstanding under the Revolving Credit Facility to settle the outstanding Term Loan principalas of $83.2 million.

Due to the early payments on the Term Loan and the modification of the Credit Facility, the Company recorded losses on extinguishment of debt of $1.3March 31, 2019 was $33.2 million and $6.0 million during the three and nine months ended September 30, 2018, respectively.is due upon maturity on August 31, 2023.
The Amended and Restated Credit Agreement does not include any term loan component 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 Amended and Restated 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 September 30, 2018.March 31, 2019. 
Interest expense recognized onunder the Senior Credit Agreement for the three and nine months ended September 30,March 31, 2019 and 2018 totaled $1.1$0.5 million and $4.8$2.1 million, respectively, for the stated interest and commitment fee. Amortization of debt issuance costs associated with the Senior Credit Agreement was $0.1 million and $0.8$0.3 million, respectively for the three and nine months ended September 30,March 31, 2019 and 2018 and was recorded to interest expense in the Company'sCompany’s Consolidated Statements of Operations.Income.
Note 7.6. Stockholders’ Equity
Issuances of Common Stock
A summary of the status of stock option activity for the three months ended March 31, 2019 is as follows (in thousands, except price data):
 
Number
of Shares
 
Weighted-
average exercise
price per
share
Outstanding at December 31, 20181,877
 $21.53
Granted168
 59.18
Exercised(355) 17.77
Cancelled(2) 37.37
Outstanding at March 31, 20191,688
 $26.06
A summary of the status of restricted stock unit activity for the three months ended March 31, 2019 is as follows (in thousands, except price data):
 Shares 
Weighted-average
grant date
fair value
Non-vested at December 31, 2018676
 $30.75
Granted220
 59.45
Vested(68) 21.45
Forfeited(2) 42.51
Non-vested at March 31, 2019826
 $39.11
During the ninethree months ended September 30, 2018,March 31, 2019, the Company issued 275,440 shares of common stock in conjunction with the vesting and release of RSUs. The Company also issued 842,967 shares of common stock upon the exercise of stock options and 49,27021,600 shares of common stock in connection with the Company’s employee stock purchase plan (the “ESPP”), resulting in net proceeds to the Company of approximately $16.0 million during the nine months ended September 30, 2018. The Company withheld 81,247 shares of outstanding common stock in connection with payment of minimum tax withholding obligations for certain employees relating to the lapse of restrictions on certain RSUs with a value of approximately $3.8 million during the nine months ended September 30, 2018.
During the nine months ended September 30, 2017, the Company issued 99,669 shares of common stock in conjunction with the vesting and release of RSUs. The Company also issued 954,527 shares of common stock upon the exercise of stock options and 58,099 shares of common stock in connection with the Company’s ESPP, resulting in net proceeds to the Company of approximately $15.2 million during the nine months ended September 30, 2017. The Company withheld 25,079 shares of outstanding common stock in connection with payment of minimum tax withholding obligations for certain employees relating to the lapse of restrictions on certain RSUs with a value of approximately $0.5 million during the nine months ended September 30, 2017.
As discussed in Note 6, during the nine months ended September 30, 2018, the Company issued 3,699,043 shares of common stock in exchange for $108.8 million in aggregate principal of the Convertible Senior Notes..

Stock-Based Compensation
The expense related to the Company’s stock-based compensation plans included in the accompanying Consolidated Statements of OperationsIncome was as follows (in thousands):
  Three months ended September 30, Nine months ended September 30,
 
  2018 2017 2018 2017
 Cost of sales$255
 $117
 $751
 $354
 Research and development539
 396
 1,732
 1,212
 Sales and marketing686
 434
 2,199
 1,341
 General and administrative1,295
 932
 4,508
 3,031
 Total stock-based compensation expense$2,775
 $1,879
 $9,190
 $5,938
  Three months ended 
 March 31,
 
  2019 2018
 Cost of sales$280
 $231
 Research and development565
 592
 Sales and marketing1,119
 796
 General and administrative1,624
 1,317
 Total stock-based compensation expense$3,588
 $2,936
Total compensation expense recognized for the three and nine months ended September 30, 2018 includes $0.8 million and $2.7 million related to stock options and $2.0 million and $6.5 million related to RSUs. Total compensation expense recognized for the three and nine months ended September 30, 2017 includes $1.0 million and $3.1 million related to stock options and $0.9 million and $2.8 million related to RSUs. As of September 30, 2018,March 31, 2019, total unrecognized compensation expense related to non-vested stock options was $5.4$30.3 million, which is expected to be recognized over a weighted-average period of approximately 1.92.4 years. As of September 30, 2018, total unrecognized compensation expense related to non-vested restricted stock was $13.2 million, which is expected to be recognized over a weighted-average period of approximately 2.3 years. Compensation expense capitalized to inventory and compensation expense related to the Company’s ESPP were not material for the three and nine months ended September 30, 2018 or 2017.
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.
Nine months ended September 30,Three months ended 
 March 31,
2018 20172019 2018
Risk-free interest rate2.49% 2.31%2.51% 2.49%
Expected option life (in years)6.29
 6.63
5.68
 6.29
Volatility rate36% 36%39% 36%
Dividend rate% %% %
Weighted-average grant date fair value$23.67
 $18.76
The weighted-average fair value of stock options granted during the nine months ended September 30, 2018 and 2017 was $18.76 and $8.71, respectively. The Company granted 159,017 and 253,844 stock options during the nine months ended September 30, 2018 and 2017, respectively. The Company granted 231,657 and 335,716 RSUs during the nine months ended September 30, 2018 and 2017, respectively. 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 ninethree months ended September 30,March 31, 2019 and 2018 was $59.45 and 2017 was $49.45$46.48, respectively.
Compensation expense capitalized to inventory and $21.61, respectively.compensation expense related to the Company’s ESPP were not material for the three months ended March 31, 2019 or 2018.

Note 8.7. Industry and Geographic Information
The Company operates in one reportable segment. Sales to customers outside the U.S. represented $124.3$41.5 million (32%(28%) and $21.6$41.9 million (13%(25%) of total revenue for the ninethree months ended September 30,March 31, 2019 and 2018, and 2017, respectively. As of September 30, 2018March 31, 2019 and December 31, 2017,2018, accounts receivable due from foreign customers were $10.1$23.1 million and $18.8$23.4 million, respectively.
The Company had sales to individual customers in excess of 10% of total revenues, as follows:
Nine months ended 
 September 30,
Three months ended 
 March 31,
2018 20172019 2018
Customer:      
A17% 21%17% 16%
B14% 13%17% 20%
C12% 21%13% 13%
43% 55%47% 49%
As of September 30, 2018March 31, 2019 and December 31, 2017,2018, accounts receivable from customers with balances due in excess of 10% of total accounts receivable totaled $38.6$37.6 million and $44.4$33.3 million, respectively.

Consolidated net revenues by product category for the three and nine months ended September 30,March 31, 2019 and 2018 and 2017 are as follows (in thousands):
Three month ended September 30, Nine months ended 
 September 30,
Three months ended 
 March 31,
2018 2017 2018 20172019 2018
Rapid Immunoassay$35,366
 $36,458
 $132,740
 $115,974
$62,494
 $80,685
Cardiac Immunoassay65,287
 
 203,581
 
65,872
 68,444
Specialized Diagnostic Solutions12,294
 11,655
 39,859
 37,731
13,854
 14,871
Molecular Diagnostic Solutions4,452
 2,781
 13,517
 9,148
5,748
 5,143
Total revenues$117,399
 $50,894
 $389,697
 $162,853
$147,968
 $169,143
Note 9.8. Commitments and Contingencies
Operating Lease - 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.
The components of lease expense and supplemental cash flow information related to leases were as follows (in thousands):
 Three months ended
 March 31,
2019
Finance lease ROU asset amortization$63
Finance lease interest expense209
Total finance lease costs272
Operating lease costs2,505
Total lease costs$2,777
  
Cash paid for amounts included in the measurement of operating lease liabilities 
Operating cash flows from operating leases$2,280
Operating cash flows from finance leases$209
Right-of-use assets obtained in exchange for new lease liabilities 
Operating leases$328
Finance leases$1,326

Commitments for minimum rentals under non-cancelable leases as of March 31, 2019 are as follows (dollars in thousands):
Years ending December 31, Operating Finance
2019 $6,918
 $989
2020 9,340
 1,262
2021 9,576
 1,270
2022 8,568
 1,281
2023 8,184
 1,291
Thereafter 76,566
 3,129
Total lease payments 119,152
 9,222
Less: imputed interest (29,949) (4,076)
Total $89,203
 $5,146
Less: current portion of operating lease liability (5,385) (478)
Non-current portion of operating lease liability $83,818
 $4,668
     
Weighted average remaining lease term (in years) 12.7
 6.3
Weighted average discount rate 4% 18%
Summers Ridge Property
On January 5, 2018, the Company entered into a sale and leaseback transaction for the San Diego property on Summers Ridge Road (the "Summers Ridge Property") that was acquired as part of the Triage Business from Alere discussed in Note 11. The Summers Ridge Property was included as assets held for sale on the Consolidated Balance Sheet as of the year ended December 31, 2017. Lease The Company sold the Summers Ridge Property for a net consideration of $146.6 million. In addition, the Company entered into a lease agreement with the buyer to leaseleases two of the four buildings that are located on the Summers Ridge Property forin San Diego, California with an initial term of 15 years.years beginning January 2018. Such lease includes options to extend the lease for two additional 5-year terms upon satisfaction of certain conditions, which have not been included in the determination of the lease term. The Summers Ridge lease is subject to certain must-take provisions related to the remaining two additional buildings consistingthat may create significant rights and obligations. The lease for one such building is expected to commence in the fourth quarter of approximately 124,461 square feet, upon the expiration of certain leases with the tenants of the other portion of the Summers Ridge Property. The initial term can be extended by the Company for two additional five-year terms upon satisfaction of certain conditions.
The approximate future2019 and has minimum lease payments of the Summers Ridge Property are $1.5$18.4 million during its lease term. The lease for the remainderremaining building is subject to the expiration of 2018, $6.5 millionthe lease with the current tenant of such building, for 2019, $7.6 millionwhich the date is not yet known.
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 absorb the majority of the partnership’s expected losses or receive a majority of the partnership’s residual returns. The McKellar Court lease ends in December 2020 $7.8 millionand contains options to extend the lease for 2021, $8.0 million for 2022, $8.3 million for 2023 and $86.8 millionthree additional five-year periods, of which one five-year period is included in the aggregate after 2023.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 BusinessBusiness”) 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. Beckman has filed
On December 7, 2018, the trial court granted a motion by Beckman for summary adjudication, whichholding that the Exclusivity Provision is scheduled to be heard onvoid under California law (the “December 7 Order”). On December 18, 2018, the trial court stayed the effect of the December 7 2018. TrialOrder 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 thisthe 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. Oral argument has not been scheduled in the matter but is currently scheduledanticipated to begintake place in the summer of 2019. The Court of Appeal will likely

issue a written decision on August 30, 2019.the writ petition within 90 days of oral argument.
We denyQuidel denies that the contractual provisionExclusivity Provision is unlawful, denydenies any liability with respect to this matter, and intendintends to vigorously defend ourselves.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;matter, some of which are before the Court of Appeal on Quidel’s writ petition; and (3) discovery is in the very early stages.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 September 30, 2018March 31, 2019 and December 31, 20172018 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'sCompany’s results of operations and cash flows.
The Company also maintains insurance, including coverage for product liability claims, in amounts whichthat management believes are appropriate given the nature of its business.
Note 10.9. 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):
September 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 TotalLevel 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total
Assets:               
Derivative assets$
 $361
 $
 $361
 $
 $
 $
 $
Total assets measured at fair value$
 $361
 $
 $361
 $
 $
 $
 $
Liabilities:               
Contingent consideration$
 $
 $18,752
 $18,752
 $
 $
 $24,301
 $24,301
$
 $
 $19,100
 $19,100
 $
 $
 $19,112
 $19,112
Deferred consideration
 184,845
 
 184,845
 
 223,158
 
 223,158

 189,501
 
 189,501
 
 187,158
 
 187,158
Total liabilities measured at fair value$
 $184,845
 $18,752
 $203,597
 $
 $223,158
 $24,301
 $247,459
$
 $189,501
 $19,100
 $208,601
 $
 $187,158
 $19,112
 $206,270
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 and nine monththree-month periods ended September 30, 2018March 31, 2019 and the year ended December 31, 2017.2018.
Derivative financial instruments are 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 will pay up to $280.0pays annual installments of $40.0 million each in cash, of which $256.0 million is guaranteed and is considered deferred consideration and $24.0up to $8.0 million iseach in contingent consideration.consideration through April 2023. The fair value of the deferred consideration was determined to be $220.6 million on the acquisition dateis calculated based on the net present value of cash payments. The discountpayments using an estimated borrowing rate utilized was based on a quoted borrowing rateprice for a similar liability. The Company recorded $7.7$2.3 million for the accretion of interest on the deferred consideration during the ninethree months ended September 30, 2018.March 31, 2019. The fair value of contingent consideration on the acquisition date was $19.7 million and wasis calculated using a discounted probability weighted valuation model. Due to changes in the estimated probabilities and a shorter discounting period related to the BNP Business contingent consideration, the fair value of the contingent consideration liabilities changed during the three and nine months ended September 30, 2018. These changes resulted in a $0.7 million loss recorded to general and administrative expense in the Consolidated Statements of Operations during the nine months ended September 30, 2018.
In conjunction with the acquisitions of BioHelix Corporation in May 2013, AnDiaTec GmbH & Co. KG in August 2013 and Immutopics, Inc. in March 2016, the Company recorded contingent consideration of $0.3 million as of September 30, 2018 and $4.6 million as of December 31, 2017. The Company assesses the fair value of contingent consideration to be settled in

cash related to these prior acquisitions using a discounted revenue model. Significant assumptions used in the measurement include revenue projections and discount rates. This fair value measurement of contingent consideration is based on significant inputsrates that are not observed in the market and thus represent Level 3 measurements.

Changes in estimated fair value of contingent consideration liabilities from December 31, 20172018 through September 30, 2018March 31, 2019 are as follows (in thousands):

Contingent consideration liabilities
(Level 3 measurement)
Balance at December 31, 2017$24,301
Cash payments(6,294)
Loss recorded for fair value adjustments745
Balance at September 30, 2018$18,752

Contingent consideration liabilities
(Level 3 measurement)
Balance at December 31, 2018$19,112
Cash payments(12)
Balance at March 31, 2019$19,100
Note 11. Acquisition10. Derivatives and Hedging
On October 6, 2017,In the normal course of business, the Company closedis 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. All hedging relationships for all 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 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 other current assets or other current liabilities depending on the acquisitionrealized and unrealized gain or loss position of the Triage® MeterPro® Cardiovascular (CV) and toxicology business ("Triage Business), and B-type Naturietic Peptide (BNP) assay business run on Beckman Coulter analyzers ("BNP Business" and, together, the "Triage and BNP Businesses") from Alere Inc. ("Alere"). The acquisition has been accounted for in conformity with ASC Topic 805, Business Combinations. In connection with the acquisitionhedged contract as of the Triage Business,balance sheet date. Changes in the Company paid $399.8 million in cash and assumed certain liabilities. These acquisitions enhance the Company's revenue profile and expand the Company's geographic footprint and product portfolio. The Company used proceeds from the Term Loan (defined and discussed in Note 6) of $245.0 million and cash on hand to pay (i) the consideration for the Triage Business and (ii) fees and expenses incurred in connection with the acquisition of the Triage and BNP Businesses. In connection with the acquisition of the BNP Business, the Company: (i) will pay (A) $16.0 million in cash plus up to an additional $24.0 million in contingent consideration, payable in five annual installments of up to $8.0 million, the first of which was due and paid in April 2018, (B) $240.0 million in cash, payable in six annual installments of $40.0 million each, the first of which was due and paid in April 2018 and (C) $0.2 million in cash for certain inventory related adjustments; and (ii) assumed certain liabilities.
The purchase price consideration is as follows (in thousands):
Cash consideration—Triage Business$399,798
Deferred consideration—BNP Business220,550
Contingent consideration—BNP Business19,700
Inventory related adjustment205
Net consideration$640,253
The fair value of the deferred consideration was determinedderivatives are recorded to be $220.6 millionother comprehensive income (loss) until the underlying hedged item is recognized in earnings, or the derivative no longer qualifies as a highly effective hedge. 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 acquisition dateterms 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 present value of cash payments. fair values. We did not have any derivative instruments with credit-risk related contingent features that would require us to post collateral.
The discount rate utilized was based on a quoted borrowing rate for a similar liability. Thefollowing table summarizes the fair value of contingent consideration on the acquisition date of $19.7 million was calculated using a discounted probability weighted valuation model.

The componentsand notional amounts of the purchase price allocation at the acquisition date isforeign currency forward contracts as followsof March 31, 2019 (in thousands):
Prepaid expenses and other current assets$796
Assets held for sale146,540
Inventories52,205
Property, plant and equipment10,608
Intangible assets184,900
Goodwill245,531
Other non-current assets182
Total assets acquired$640,762
Other current liabilities(509)
Total net assets and liabilities acquired$640,253
 March 31, 2019
 Notional Amount Fair Value, Net
Prepaid expenses and other current assets$14,121
 $361
Goodwill representsTotal gain recognized in other comprehensive income for the excessthree months ended March 31, 2019 was $0.3 million, net of tax. There were no reclassifications from other comprehensive income into total revenues for the total purchase price over the fair value of the underlying net assets, largely arising from synergies expected to be achieved by the combined Company and the expanded revenue profile and product diversity. The goodwill is fully deductible for tax purposes.

The fair value of the identified intangible assets was determined primarily using an income-based approach. Intangible assets are amortized on a straight-line basis over the respective amortization periods. The following sets forth results of the amounts assigned to the identifiable intangible assets acquired (in thousands):
Intangible Asset Amortization period Fair value of assets acquired
Purchased technology 10 years $52,400
Customer relationships 7 years 115,000
Trademarks 10 years 17,500
Total intangible assets   $184,900
three months ended March 31, 2019.

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: our reliance on sales of our influenza 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 the related potential impact on humans from novel influenza viruses, adverse changes in competitive conditions in domestic and international markets, 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 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 the related potential impact on humans from novel influenza 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; adverse actionsfailures 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;clearances or other adverse actions by regulatory authorities; changes in government policies; our exposure to claims and litigation, including litigation currently pending against us; costs of or ourand 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;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 security breaches;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, sharing arrangements, 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 theour acquisition and integration of the Triage MeterPro Cardiovascular and toxicology business and B-type Naturietic Peptide assay business (the “Triage and BNP Businesses;Businesses”); Alere’s failure to perform under various transition agreements relating to our acquisition of the Triage and BNP Businesses; that we may incur substantial costs to build our information technology infrastructure to transition the Triage and BNP Businesses; that we may have to write off goodwill relating to our acquisition of the Triage and BNP Businesses; our ability to manage our growth strategy; the level of our indebtedness; the amount of,indebtedness and deferred payment obligations; our ability to generate sufficient cash to meet our debt service and deferred contingent payment obligations and our ability to repay, renew or extend, our outstanding debt and its impact on our operations and our ability to obtain financing; that substantially theour Senior Credit Facility is secured by substantially all of our assets; our prepayment requirements under the Senior Credit Facility; the agreements for our indebtedness place operating and financial restrictions on the Company;us and our ability to operate our business; that an event of default could trigger acceleration of our outstanding indebtedness; the effect on our operating results from the trigger of the conditional conversion feature of our Convertible Senior Notes; 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; and our intention of not paying dividends.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 20182019 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; projected capital expenditures for the remainder of 20182019 and our source of funds for such expenditures; the sufficiency of our liquidity and capital resources; our strategy, goals, initiatives and objectives; the impact of new accounting standards; our exposure to, and defenses against, claims and litigation; the sufficiency of our liquidity and our short-term needs

for capital; our use of foreign currency hedging agreements; that we may incur additional debt or issue additional equity; that we may enter into agreements to share foreign currency exchange fluctuation risk; and our intention to continue to evaluate technology, product lines and acquisition opportunities. The risks described under “Risk Factors” in Item 1A of this Quarterly Report on Form 10-Q and our Annual Report on Form 10-K for the year ended December 31, 2017,2018, 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.
The following should be read in conjunction with the Consolidated Financial Statements and Notes thereto beginning on page 3 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, cardiac 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. The Company operates in one business segment that develops, manufactures and markets our four product categories.
Outlook
We anticipate continued revenue growthto grow during the remainder of 20182019 and a related positive impact on gross margin and earnings. This growth is expected to be driven primarily by the impact of the Triage and BNP Businesses and sales of our Cardiac Immunoassays, Sofia assaysImmunoassays and molecular products. In addition, we expect continued and significant investment in research and development activities as we invest indevelop our next generation immunoassay and molecular platforms. 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 September 30, 2018March 31, 2019 compared to the three months ended September 30, 2017March 31, 2018
Total Revenues
The following table compares total revenues for the three months ended September 30,March 31, 2019 and 2018 and 2017 (in thousands, except percentages):
Three months ended 
 September 30,
 Increase (Decrease)Three months ended 
 March 31,
 Increase (Decrease)
2018 2017 $ %2019 2018 $ %
Rapid Immunoassay$35,366
 $36,458
 $(1,092) (3)%$62,494
 $80,685
 $(18,191) (23)%
Cardiac Immunoassay65,287
 
 65,287
 N/A
65,872
 68,444
 (2,572) (4)%
Specialized Diagnostic Solutions12,294
 11,655
 639
 5 %13,854
 14,871
 (1,017) (7)%
Molecular Diagnostic Solutions4,452
 2,781
 1,671
 60 %5,748
 5,143
 605
 12 %
Total revenues$117,399
 $50,894
 $66,505
 131 %$147,968
 $169,143
 $(21,175) (13)%
For the three months ended September 30, 2018,March 31, 2019, total revenue increaseddecreased to $117.4$148.0 million from $50.9$169.1 million in the prior period. The increasedecrease in total revenues was primarily driven by Cardiac Immunoassay revenue from the acquisition of the Triage and BNP Businesses in October 2017. The 60% increase in our Molecular revenues was driven by continued gains on our Solana platform. These increases were partially offset by lower Rapid Immunoassay sales as compared with the robust respiratory season in the prior year. The Cardiac business declined slightly from the prior year due to the currency impact of a strengthening US dollar, less favorable geographic mix and lower selling prices as we transition portions of the global business to distribution. The decrease in Specialized Diagnostic Solutions was driven primarily due to timingby lower sales of distributor orders as we enterrespiratory products from the the cold and flu season versus prior year.Virology segment.
Gross Profit
Gross profit increaseddecreased to $69.6$90.9 million, or 59%61% of revenue for the three months ended September 30, 2018,March 31, 2019, compared to $29.7$106.3 million, or 58%63% of revenue for the three months ended September 30, 2017.March 31, 2018. The increaseddecreased gross profit was mainly driven by the additionlower Rapid Immunoassay revenue, currency fluctuation, less favorable geographic mix and lower Cardiac Immunoassay selling prices as a result of the Cardiac Immunoassay products fromtransition to distribution. This was partially offset by the acquisition ofinventory step-up amortization during the Triage and BNP Businesses in October 2017.three months ended March 31, 2018, which did not recur during the three months ended March 31, 2019. Gross margin increased by 1%declined compared to the same period in the prior year due to lower amortization of intangibles on the legacy Quidel business.same factors.

Operating Expenses
The following table compares operating expenses for the three months ended September 30,March 31, 2019 and 2018 and 2017 (in thousands, except percentages):
Three months ended September 30,    Three months ended 
 March 31,
    
2018 2017    2019 2018    
Operating
expenses
 As a % of
total
revenues
 Operating
expenses
 As a % of
total
revenues
 
 Increase (Decrease)
Operating
expenses
 As a % of
total
revenues
 Operating
expenses
 As a % of
total
revenues
 
 Increase (Decrease)
$ %$ %
Research and development$13,103
 11% $7,468
 15% $5,635
 75 %$13,930
 9% $12,621
 7% $1,309
 10 %
Sales and marketing$26,504
 23% $13,588
 27% $12,916
 95 %$29,589
 20% $28,558
 17% $1,031
 4 %
General and administrative$10,620
 9% $6,580
 13% $4,040
 61 %$13,431
 9% $10,532
 6% $2,899
 28 %
Acquisition and integration costs$2,521
 2% $4,591
 9% $(2,070) (45)%$2,824
 2% $3,467
 2% $(643) (19)%
Research and Development Expense
Research and development expense for the three months ended September 30, 2018March 31, 2019 increased from $7.5$12.6 million to $13.1$13.9 million due primarily to additional expenses associated with the Triage Business and investments inincreased third-party spend for the Savanna molecular diagnostic platform.
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 September 30, 2018March 31, 2019 increased from $13.6$28.6 million to $26.5$29.6 million primarily driven by increased expenses associated withhigher salaries and related costs as we complete the global footprintglobalization of the newly acquired Triage and BNP Businesses in October 2017. Additionally, the Company experienced higher compensationour commercial team, product promotion costs and professional service fees, for professional services.partially offset by lower transition service fees.
General and Administrative Expense
General and administrative expense for the three months ended September 30, 2018March 31, 2019 increased from $6.6$10.5 million to $10.6$13.4 million compared with the prior year period primarily due to our global infrastructure created in support of the acquired Triage BNP businesses. The Company also had increased compensation costs due to international expansion, facilities costs and professional service fees in the period.
Acquisition and Integration Costs
Acquisition and integration costs for the three months ended September 30, 2018March 31, 2019 decreased from $4.6$3.5 million to $2.5$2.8 million compared with the prior year period, as more of the global operations become fully integrated into the business.
Other Expense, Net
Interest expense, net primarily relates to accretion of interest on the deferred consideration related to the BNP Business, coupon and accretion interest related to our Convertible Senior Notes and interest and amortization of deferred financing costs associated with the Senior Credit Facility.Agreement. The increasedecrease in interest expense of $2.0$3.3 million over the lastprior year quarter was primarily due to the interest incurredlower debt balances under the deferred consideration and the Senior Credit Facility entered into in connection with the acquisitions of the Triage and BNP Businesses. Loss on extinguishment of debt of $1.3 million was due to the modification of the SeniorCompany’s Credit Agreement and the resulting write-off of certain previously capitalized costs relating to the Term Loan.Convertible Senior Notes. See further discussion in Note 65 of the Notes to the Consolidated Financial Statements in this Quarterly Report.

Income Taxes
The income tax benefit was insignificant forDuring the three months ended September 30, 2018. ForMarch 31, 2018, the three months ended September 30, 2017, income tax expense was $0.2 million. For the three months ended September 30, 2018, we had an insignificant income tax benefit compared to income tax expense in the prior year primarily as a result of the reduction in the tax rate from the Tax Act and higher discrete tax benefitsCompany recorded during the 2018 periods for excess tax benefits of stock-based compensation.
Nine months ended September 30, 2018 compared to the nine months ended September 30, 2017
Total Revenues
The following table compares total revenues for the nine months ended September 30, 2018 and 2017 (in thousands, except percentages):
 For the nine months ended    
September 30, Increase (Decrease)
 2018 2017 $ %
Rapid Immunoassay$132,740
 $115,974
 $16,766
 14%
Cardiac Immunoassay203,581
 
 203,581
 N/A
Specialized Diagnostic Solutions39,859
 37,731
 2,128
 6%
Molecular Diagnostic Solutions13,517
 9,148
 4,369
 48%
Total revenues$389,697
 $162,853
 $226,844
 139%
For the nine months ended September 30, 2018, total revenue increased to $389.7 million from $162.9 million in the prior year. The increase in total revenues was driven primarily by Cardiac Immunoassay revenue from the acquisition of the Triage and BNP Businesses. The Company also realized increases in Rapid Immunoassay revenues due primarily to growth in Influenza, bolstered by a robust cold and flu season during the first quarter of 2018. Molecular products were up 48% over prior year driven by continued revenue growth on the Solana platform.
Gross Profit
Gross profit increased to $233.6 million, or 60% of revenue for the nine months ended September 30, 2018, compared to $97.0 million, or 60% of revenue for the nine months ended September 30, 2017. The increased gross profit was mainly driven by the addition of the Cardiac Immunoassay products from the acquisition of the Triage and BNP Businesses and increased Influenza revenues in the current year. Gross margin remained consistent with the same period in the prior year.
Operating Expenses
The following table compares operating expenses for the nine months ended September 30, 2018 and 2017 (in thousands, except percentages):
 For the nine months ended September 30,    
 2018 2017    
 Operating
expenses
 As a % of
total
revenues
 Operating
expenses
 As a % of
total
revenues
 
 Increase (Decrease)
 $ %
Research and development$39,008
 10% $22,970
 14% $16,038
 70%
Sales and marketing$82,607
 21% $40,875
 25% $41,732
 102%
General and administrative$32,652
 8% $20,483
 13% $12,169
 59%
Acquisition and integration costs$10,923
 3% $7,022
 4% $3,901
 56%
Research and Development Expense
Research and development expense for the nine months ended September 30, 2018 increased from $23.0 million to $39.0 million due primarily to additional expenses associated with the Triage Business and investments in the Savanna molecular diagnostic platform.

Research and development expenses include direct external costs such as fees paid to 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 nine months ended September 30, 2018 increased $41.7 million to $82.6 million compared with the prior year period, due primarily to increased expenses associated with the newly acquired Triage and BNP Businesses in October 2017. Increases were also driven by higher compensation costs associated with additional headcount and improved company performance.
General and Administrative Expense
General and administrative expense for the nine months ended September 30, 2018 increased from $20.5 million to $32.7 million compared with the prior year period, due to additional costs associated with the Triage and BNP Businesses, higher professional fees and higher compensation costs associated with improved company performance.
Acquisition and Integration Costs
Acquisition and integration costs for the nine months ended September 30, 2018 increased from $7.0 million to $10.9 million driven by integration activities related to the acquisitions of the Triage and BNP Businesses.
Other Expense, net
Interest expense, net was $19.5 million and $8.4 million for the nine months ended September 30, 2018 and 2017, respectively. Interest expense, net primarily relates to accretion of interest on the deferred consideration, coupon and accretion interest related to our Convertible Senior Notes and interest and amortization of deferred financing costs associated with the Senior Credit Facility. The increase in interest expense of $11.1 million over the prior year was primarily due to the accretion of interest on deferred consideration related to the BNP Business and interest incurred under the Senior Credit Facility. These increases were partially offset by lower interest expense associated with the Convertible Senior Note due to conversions during the current year. Lossloss on extinguishment of debt of $8.3$4.6 million for the nine months ended September 30, 2018 relatesin related to the $161.8$100.0 million early payment on the Company’s previous Term Loan and the extinguishment of $108.8$70.2 million in aggregate principal of the Convertible Senior Notes in exchange for the Company's common stock during the period and the was due to the modification of the Senior Credit Agreement and the resulting write-off of certain previously capitalized costs relating to the Term Loan. See further discussion in Note 6 to the Consolidated Financial Statements in this Quarterly Report.stock. 
Income Taxes
For the ninethree months ended September 30,March 31, 2019 and 2018 and 2017, we recognized income tax benefit of $1.1 million andrespectively, the income tax expense of $0.4was $1.7 million respectively. Forand $4.7 million. The lower tax expense for the ninethree months ended September 30, 2018, we had anMarch 31, 2019 compared to income tax benefit compared to an income tax expense for the same period in the prior year primarily asis a result of lower pre-tax profits, increased benefits from the reduction in the tax rate fromFDII provisions of the Tax Act, the impactsremoval of the fullCompany’s valuation allowance on U.S. earningsat the end of 2018 and higher discrete tax benefits recorded during the period related toin 2019 for excess tax benefits of stock-based compensation.
The Tax Act significantly revises how companies compute their U.S corporate tax liability by, among other provisions, reducing the corporate tax rate from 35% to 21% for tax years beginning after December 31, 2017, implementing a territorial tax system, and requiring a mandatory one-time tax on U.S.-owned undistributed foreign earnings and profits known as the transition tax.

Liquidity and Capital Resources
As of September 30, 2018March 31, 2019 and December 31, 2017,2018, the principal sources of liquidity consisted of the following (in thousands): 
September 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
Cash and cash equivalents$38,694
 $36,086
$56,938
 $43,695
Working capital including cash and cash equivalents (1)$95,585
 $202,881
Amount available to borrow under the Revolving Credit Facility$141,812
 $121,812
Working capital including cash and cash equivalents$52,089
 $33,662
Adjusted working capital (1)$106,969
 $88,041
(1) The Convertible Senior Notes balance of $53.9$54.9 million isand $54.4 million as of March 31, 2019 and December 31, 2018 respectively are excluded from the adjusted working capital amount as such notes may be settled at the Company'sCompany’s option in cash or a combination of cash and shares of common stock.

As of September 30, 2018,March 31, 2019, we had $38.7$56.9 million in cash and cash equivalents, a $2.6$13.2 million increase from December 31, 2017.2018. Our cash requirements fluctuate as a result of numerous factors, such as cash generated from operations, progress in research and development projects, competition andasset acquisitions, technological developmentsdevelopment spend and the time and expenditures required to obtain governmental approval of our products as well as asset acquisitions.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 such transactions.
Our primary source of liquidity, other than our holdings of cash and cash equivalents, has been cash flows from operations, debt financings and proceeds from issuance of common stock. 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 as well as access to funds from our Revolving Credit Facility will be sufficient to fund our near-term capital and operating needs for at least the next 12 months. 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 both in the United States and abroad;
interest on and repayments of our Convertible Senior Notes, Revolving Credit Facility, 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;
the integration of our recent acquisitions; 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 September 30, 2018.March 31, 2019. The principal balance outstanding as of September 30, 2018March 31, 2019 was $58.5 million. On August 31, 2018, we entered into an amendment to the Credit Agreement to increase theOur Revolving Credit Facility limit to $175.0has a principal balance outstanding of $33.2 million and transferred the Term Loan principal of $83.2 million to the Revolving Credit Facility. The Revolving Credit Facility maturesis due upon maturity on August 31, 2023. See Note 65 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.
As of September 30, 2018,March 31, 2019, we have $203.6$208.6 million in fair value of deferred and contingent considerations associated with prior acquisitions to be settled in future periods.

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 successfully integrate our recently acquired businesses;
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
Nine months ended September 30,Three months ended 
 March 31,
2018 20172019 2018
Net cash provided by operating activities:$93,128
 $16,484
$32,897
 $35,814
Net cash provided by (used for) investing activities:123,769
 (27,155)
Net cash (used for) provided by financing activities:(214,474) 14,137
Net cash (used for) provided by investing activities:(4,993) 141,695
Net cash used for financing activities:(14,679) (111,796)
Effect of exchange rates on cash185
 20
18
 13
Net increase in cash and cash equivalents$2,608
 $3,486
$13,243
 $65,726
Cash provided by operating activities of $93.1$32.9 million during the ninethree months ended September 30, 2018March 31, 2019 reflects net income of $41.7$24.8 million and non-cash adjustments of $67.2$18.5 million primarily associated with depreciation, amortization, stock-based compensation and accretion of interest on deferred consideration. In addition, we used cash to fund our working capital requirements of $11.2 million, primarily driven by an increase in accounts receivable and a decrease in accrued payroll and related expenses, partially offset by a decrease in prepaid expenses and other current and non-current assets primarily driven by a change in receivables related to our transition services agreements. For the three months ended March 31, 2018, cash provided by operating activities of $35.8 million reflected net income of $34.0 million and non-cash interest expense,adjustments of $27.7 million associated with depreciation, amortization, loss on extinguishment of debt, amortization of inventory step-up to fair value, and lossaccretion of interest on extinguishment of debt. In addition, we used cash for net working capital of $19.3 million, primarily driven by changes in receivables related to our transition services agreements and income taxes receivable. For the nine months ended September 30, 2017, cash provided by operating activities of $16.5 million reflected net loss of $3.1 million and non-cash adjustments of $28.0 million primarily related to depreciation, amortizationdeferred consideration, and stock-based compensation. Additionally,Offsetting this was a net working capital use of $12.5$28.2 million, offset a portion of the increase.primarily related to an increase in accounts receivable.
Our investing activities provided $123.8used $5.0 million during the ninethree months ended September 30,March 31, 2019 primarily to fund building improvements and the purchase of production equipment, and Sofia, Solana and Triage instruments available for lease. Our investing activities provided $141.7 million during the three months ended March 31, 2018 primarily from the saledue to sales of the Summers Ridge property for approximately $146.6 million. Additionally, we used $22.9 million to acquire production equipment, building improvements and Sofia, Solana and Triage instruments available for lease. Our investing activities used $27.2 million during the nine months ended September 30, 2017, primarily consisting of the acquisition of the InflammaDry and AdenoPlus diagnostic businesses from RPS for approximately $14.4 million and $12.8$4.9 million on production equipment, building improvements intangible assets and Sofia and Solana instruments available for lease.lease and intangible assets.
We are currently planning approximately $10.0$31.0 million in capital expenditures for the remainder of 2018.2019. The primary purpose for our capital expenditures is to acquire manufacturing and scientific equipment, to purchase or develop information technology, to acquire Sofia, Solana and Triage instruments and to implement facility improvements. We plan to fund these capital expenditures with the cash on our balance sheet.
Cash used by financing activities was $214.5$14.7 million during the ninethree months ended September 30, 2018March 31, 2019 primarily related to payments on the Term Loan of $161.8 million, payments on the Revolving Credit Facility of $10.0$20.0 million payments on deferred consideration of $46.0 million,and repurchases of common stock of $3.8 million, $2.0 million of transaction costs related to the exchange of convertible notes for common stock and payments of acquisition contingent consideration of $6.3$1.5 million, partially offset by proceeds from issuance of stock of $16.0$6.8 million from stock option exercises. Cash providedused by financing activities was $14.1$111.8 million during the ninethree months ended September 30, 2017,March 31, 2018 and was primarily related to proceeds frompayments on the issuanceCompany’s previous Term Loan of common stock of $15.2 million from stock option exercises. This amount was partially offset by repurchases of common stock of $0.5$101.8 million and payments on the Revolving Credit Facility of acquisition related acquisition contingencies of $0.5$10.0 million.
Seasonality
Sales of our influenzarespiratory 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

calendar year. Historically, sales of our influenzarespiratory 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.
Off-Balance Sheet Arrangements
At September 30, 2018March 31, 2019 and December 31, 2017,2018, 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.
Recent Accounting Pronouncements
Information about recently adopted and proposed accounting pronouncements is included in Note 1 of the Notes to Consolidated Financial Statements in Part I, Item 1 of this Quarterly Report under the heading “Recent Accounting Pronouncements” and is incorporated herein by reference.
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 customer programs and incentives, stock-based compensation, goodwill and intangible assets, business combinations, income taxes, and convertible debt. 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, 2017. Other than the adoption of ASU 2014-09, Revenue from Contracts with Customers (Topic 606) as described in Note 1 to the Consolidated Financial Statements in this Quarterly Report, there2018. There were no material changes to our critical accounting policies and estimates during the ninethree months ended September 30, 2018.March 31, 2019.
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 interest 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 Senior Credit Facility debt is subject to interest rate risk as a portion of the interest rate fluctuates based on the LIBOR. We had $83.2$33.2 million outstanding under our Senior Credit Facility at September 30, 2018.March 31, 2019. The weighted average interest rate on these borrowings is 4.31%4.38% as of September 30, 2018.March 31, 2019. A hypothetical 100 basis point adverse move in interest rates along the entire interest rate yield curve would increase our annual interest expense by approximately $0.8$0.3 million. Based on our market risk sensitive instruments outstanding at September 30, 2018,March 31, 2019, we have determined that there was no material market risk exposure from such instruments to our consolidated financial position, results of operations or cash flows as of such date.
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 periodically evaluate our placement of investments, as of September 30, 2018,March 31, 2019, we did not have any cash and cash equivalents placed in funds held in government money market accounts and commercial paper.
Foreign Currency Exchange Risk
Sales
We are exposed to customers outsideforeign 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.
During the three months ended March 31, 2019, we generated approximately $29.5 million in revenue denominated in
currencies other than the U.S. represented $124.3 million (32%) of total revenue for the nine months ended September 30, 2018, and accounts receivable due from foreign customers was $10.1 million as of September 30, 2018. We recognized $0.5 million in foreign exchange loss for the nine months ended September 30, 2018 and an immaterial foreign exchange loss for the nine months ended September 30, 2017.dollar. The majority ofmajor currencies to which our international salesrevenues are negotiated for and paid in foreign currency, which involves currency risks. Change in the values ofexposed are the Euro and the Chinese Renminbi could result
Yuan. A 100-basis point move in currency gainsthe average exchange rates (assuming a simultaneous and losses and couldimmediate 100 basis point change
for the relevant period) would have resulted in an impact onincrease or decrease in our business, financial condition andreported revenue for the three months ended March 31, 2019 as follows (in thousands):
 Three months ended 
 March 31,
Currency2019
Chinese Yuan$146
Euro$111
While our results of operations.operations have been impacted by the effects of currency fluctuations, the revenue and expenses relating to our international operations are generally denominated in local currency, which reduces our economic exposure to foreign exchange risk in those jurisdictions.
Effective fiscal year 2019, the Company has initiated a foreign currency management policy which 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 currently hedge against exchange rate fluctuations, which means that we are fully exposed to exchange rate changes. In addition, we have certain agreements whereby we share theenter into foreign currency exchange fluctuation risk. We may,derivative instruments for trading purposes or to engage in
speculative activity. See further discussion in Note 10 to the future, enter into similarNotes to the Consolidated Financial Statements for additional information related to such arrangements.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 September 30, 2018March 31, 2019 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 September 30, 2018March 31, 2019 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 98 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
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, 2017.2018. 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, 2017.2018. 

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 September 30, 2018.March 31, 2019.
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)
July 2, 2018 - July 29, 2018 
 $
 
 $
July 30, 2018 - August 26, 2018 316
 70.76
 
 
August 27, 2018 - September 30, 2018 2,202
 73.18
 
 
Total 2,518
 $72.87
 
 $
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 31, 2018 - January 27, 2019 1,573
 $52.99
 
 $50,000,000
January 28, 2019 - February 24, 2019 20,262
 60.01
 
 50,000,000
February 25, 2019 - March 31, 2019 2,625
 67.16
 
 50,000,000
Total 24,460
 $60.33
 
 $50,000,000
(1) We withheld 2,51824,460 shares of common stock from employees in connection with payment of minimum tax withholding obligations relating to the lapse of restrictions on certain RSUs during the three months ended September 30, 2018.March 31, 2019.
(2) Our prior shareOn December 12, 2018, the Board of Directors authorized a new stock repurchase program, expiredpursuant 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 January 25, 2018 and was not renewed.December 18, 2018.
ITEM 3.    Defaults Upon Senior Securities
None.
ITEM 4.    Mine Safety Disclosures
Not applicable.

ITEM 5.    Other Information
None.

ITEM 6.    Exhibits
   
3.1 
3.2 
3.3 
4.1 
10.1*10.1(1)* 
31.1* 
31.2* 
32.1** 
101.INS* XBRL Instance Document
101.SCH* XBRL Taxonomy Extension Schema Document
101.CAL* XBRL Taxonomy Calculation Linkbase Document
101.DEF* XBRL Taxonomy Extension Definition Linkbase Document
101.LAB* XBRL Taxonomy Label Linkbase Document
101.PRE* XBRL Taxonomy Presentation Linkbase Document
___________________________
* Filed herewith.
** Furnished herewith.
(1) Indicates a management plan or compensatory plan or arrangement.




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: November 7, 2018May 8, 2019QUIDEL 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)

Exhibit Index
 
Exhibit
Number
  
3.1 
3.2 
3.3 
4.1 
10.1*10.1(1)* 

31.1* 
31.2* 
32.1** 
101.INS* XBRL Instance Document
101.SCH* XBRL Taxonomy Extension Schema Document
101.CAL* XBRL Taxonomy Calculation Linkbase Document
101.DEF* XBRL Taxonomy Extension Definition Linkbase Document
101.LAB* XBRL Taxonomy Label Linkbase Document
101.PRE* XBRL Taxonomy Presentation Linkbase Document
___________________________
* Filed herewith.
** Furnished herewith.

(1) Indicates a management plan or compensatory plan or arrangement.





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