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DEBT AND FINANCE LEASE LIABILITIES
 9 Months Ended
Sep. 30, 2022
Debt Disclosure [Abstract]  
DEBT AND FINANCE LEASE LIABILITIES DEBT AND FINANCE LEASE LIABILITIES
Debt and finance lease liabilities as of September 30, 2022 and December 31, 2021, were as follows:
As of
September 30, 2022December 31, 2021
Current:
Promissory notes$10,000 $— 
Insurance premium financing4,002 — 
Finance lease liabilities355 140 
Debt and finance lease liabilities, current$14,357 $140 
Non-current:
Convertible Notes$193,205 $— 
Financing obligation48,558 — 
Promissory notes40,876 24,639 
Finance lease liabilities619 408 
Long-term debt and finance lease liabilities, net of current portion$283,258 $25,047 
The fair value of debt obligations are estimated using level 2 fair value inputs, including stock price and risk-free rates. The following table presents the carrying value and estimated fair values:
As of September 30, 2022
Carrying ValueFair Value
Convertible Notes$193,205 $185,788 
Collateralized Note46,987 45,652 
Second Collateralized Note3,888 3,792 
Convertible Notes
In June 2022, the Company completed a private placement of $200.0 million aggregate principal amount of unsecured 8.00% / 11.00% convertible senior PIK toggle notes, which will mature on May 31, 2026. The Convertible Notes were issued pursuant to an indenture, dated as of June 1, 2022 (the "Indenture").
The Convertible Notes bear interest at 8.00% per annum, to the extent paid in cash (“Cash Interest”), and 11.00% per annum, to the extent paid in kind through the issuance of additional Convertible Notes (“PIK Interest”). Interest is payable semi-annually in arrears on May 31 and November 30 of each year, beginning on November 30, 2022. The Company can elect to make any interest payment through Cash Interest, PIK Interest or any combination thereof.
Based on the applicable conversion rate, the Convertible Notes plus any accrued and unpaid interest are convertible into cash, shares of the Company’s common stock or a combination thereof, at the Company’s election. The initial conversion rate is 114.3602 shares per $1,000 principal amount of the Convertible Notes, subject to customary anti-dilution adjustment in certain circumstances, which represented an initial conversion price of approximately $8.74 per share.
Prior to February 28, 2026, the Convertible Notes will be convertible at the option of the holders only upon the occurrence of specified events and during certain periods, and will be convertible on or after February 28, 2026, at any time until the close of business on the second scheduled trading day immediately preceding the maturity date of the Convertible Notes.
Holders of the Convertible Notes will have the right to convert all or a portion of their Convertible Notes prior to the close of business on the business day immediately preceding February 28, 2026 only under the following circumstances: (i) during any fiscal quarter commencing after the fiscal quarter ending on September 30, 2022 (and only during such fiscal quarter), if the last reported sale price of the Common Stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price for the Convertible Notes on each applicable trading day; (ii) during the five business day period after any ten consecutive trading day period in which the trading price per $1,000 principal amount of the Convertible Notes for each trading day of that ten consecutive trading day period was less than 98% of the product of the last reported sale price of the Common Stock and the conversion rate of the Convertible Notes on each such trading day; (iii) if the Company calls such Convertible Notes for redemption, at any time prior to the close of business on the second business day immediately preceding the redemption date; or (iv) upon the occurrence of specified corporate events.
The Company may not redeem the Convertible Notes prior to the third anniversary of the date of initial issuance of the Convertible Notes. The Company may redeem the Convertible Notes in whole or in part, at its option, on or after such date and prior to the 26th scheduled trading day immediately preceding the maturity date, for a cash purchase price equal to the aggregate principal amount of any Convertible Notes to be redeemed plus accrued and unpaid interest.
In addition, following certain corporate events that occur prior to the maturity date or following issuance by the Company of a notice of redemption, in each case as provided in the Indenture, in certain circumstances, the Company will increase the conversion rate for a holder who elects to convert its Convertible Notes in connection with such a corporate event or who elects to convert any Convertible Notes called for redemption during the related redemption period. Additionally, in the event of a fundamental change or a change in control transaction (each such term as defined in the Indenture), holders of the Convertible Notes will have the right to require the Company to repurchase all or a portion of their Convertible Notes at a price equal to 100% of the capitalized principal amount of Convertible Notes, in the case of a fundamental change, or 130% of the capitalized principal amount of Convertible Notes, in the case of change in control transactions, in each case plus any accrued and unpaid interest to, but excluding, the repurchase date.
The Indenture includes restrictive covenants that, subject to specified exceptions, limit the ability of the Company and its subsidiaries to incur secured debt in excess of $500.0 million, incur other subsidiary guarantees, and sell equity interests of any subsidiary that guarantees the Convertible Notes. In addition, the Indenture includes customary terms and covenants, including certain events of default after which the holders may accelerate the maturity of the Convertible Notes and become due and payable immediately.
In conjunction with the issuance of the Convertible Notes, the Company executed the Put Premium which was determined to be an embedded derivative that met the criteria for bifurcation from the host. The total proceeds received were first allocated to the fair value of the bifurcated derivative asset, and the remaining proceeds allocated to the host resulting in an adjustment to the initial purchasers' debt discount.
The net proceeds from the sale of the Convertible Notes were $183.2 million, net of initial purchasers' discounts and debt issuance costs. Unamortized debt discount and issuance costs are reported as a direct deduction from the face amount of the Convertible Notes.
The net carrying amounts of the debt component of the Convertible Notes were as follows:
As of
September 30, 2022
Principal amount$200,000 
Accrued PIK interest7,284 
Unamortized discount(6,898)
Unamortized issuance costs(7,181)
Net carrying amount$193,205 
As of September 30, 2022, the effective interest rate on the Convertible Notes was 12.99%. Amortization of the debt discount and issuance costs is reported as a component of interest expense and is computed using the straight-line method over the term of the Convertible Notes, which approximates the effective interest method. The following table presents the Company's interest expense related to convertible debt:
Three Months Ended September 30,Nine Months Ended September 30,
20222022
Contractual interest expense$5,500 $7,284 
Amortization of debt discount and issuance costs922 1,228 
Total interest expense$6,422 $8,512 
Financing Obligation
On May 10, 2022 (the "Sale Date"), the Company entered into a sale agreement (the "Sale Agreement"), pursuant to which the Company sold the land and property related to the Company's headquarters in Phoenix, Arizona for a purchase price of $52.5 million. As of the Sale Date, $13.1 million was withheld from the proceeds received related to portions of the headquarters currently under construction. The Company will receive the remaining proceeds throughout the completion of construction pursuant to the terms of the Sale Agreement. Concurrent with the sale, the Company entered into a lease agreement (the "Lease Agreement"), whereby the Company leased back the land and property related to the headquarters for an initial term of 20 years with four extension options for 7 years each. As of the Sale Date, the Company considered one extension option reasonably certain of being exercised.
The buyer is not considered to have obtained control of the headquarters because the lease is classified as a finance lease. Accordingly, the sale of the headquarters is not recognized and the property and land continue to be recognized on the Company's consolidated balance sheets. As of the Sale Date, the Company recorded $38.3 million as a financing obligation on the Company's consolidated balance sheets representing proceeds received net of debt issuance costs of $1.1 million. Rent payments under the terms of the Lease Agreement will be allocated between interest expense and principal repayments using the effective interest method. Additionally, debt issuance costs will be amortized to interest expense over the lease term.
After the Sale Date and through September 30, 2022, the Company recognized an additional $10.3 million for financing obligations on the Company's consolidated balance sheets for construction completed after the Sale Date. As of September 30, 2022, the Company has recognized a HQ Sale Agreement receivable of $4.5 million for funds not yet received for construction completed in prepaid expenses and other current assets. Additionally, for the three and nine months ended September 30, 2022, the Company recognized $0.9 million and $1.4 million, respectively, of interest expense related to interest on the financing obligation and amortization of debt issuance costs.
Promissory Notes
On May 10, 2022, and in connection with the execution of the sale and leaseback of the Company's headquarters, the Company repaid the $25.0 million promissory note that was executed in conjunction with the Company purchasing its headquarters in the fourth quarter of 2021 (the "Promissory Note").
For the nine months ended September 30, 2022, the Company recognized $0.4 million of interest expense related to interest on the Promissory Note and amortization of debt issuance costs prior to redemption. During the second quarter of 2022, the Company expensed $0.3 million of unamortized debt issuance costs related to the Promissory Note.

Collateralized Promissory Notes
On June 7, 2022, the Company executed a promissory note and a master security agreement (the "Master Security Agreement") for $50.0 million at a stated interest rate of 4.26% (the "Collateralized Note"). The Collateralized Note is fully collateralized by certain personal property assets as fully described in the Master Security Agreement. Additionally, in connection with the Collateralized Note, the Company executed a pledge agreement pursuant to which the Company pledged $50.0 million in cash as additional collateral in order to obtain a more favorable interest rate. The amount pledged is recorded in "Restricted cash and cash equivalents" as of September 30, 2022. The Collateralized Note carries a 60 month term and is payable in 60 equal consecutive monthly installments due in arrears.
For the three and nine months ended September 30, 2022, the Company recognized $0.5 million and $0.7 million, respectively, of interest expense on the Collateralized Note.
On August 4, 2022, the Company executed a promissory note and a security agreement for $4.0 million at an implied interest rate of 7.00% (the "Second Collateralized Note"). The Second Collateralized Note is fully collateralized by certain personal property assets as fully described in the security agreement. The Second Collateralized Note carries a 60 month term and is payable in 60 equal monthly installments due in arrears.
For the three months ended September 30, 2022, interest expense related to the Second Collateralized Note was immaterial.

Insurance Premium Financing
The Company executed an insurance premium financing agreement pursuant to which the Company financed certain annual insurance premiums for $6.6 million, primarily consisting of premiums for directors' and officers' insurance. The insurance premium payable incurs interest at 2.95%, and is due in monthly installments maturing on March 27, 2023.
For the three months ended September 30, 2022, interest expense on the insurance premium financing was immaterial.
Letters of Credit
During the third quarter of 2022, the Company executed a $0.6 million letter of credit to secure a customs bond through August 31, 2023. As of September 30, 2022, no amounts have been drawn on the letter of credit.
During the second quarter of 2022, and in conjunction with the execution of the Lease Agreement, the Company executed an irrevocable standby letter of credit for $12.5 million to collateralize the Company's lease obligation. The letter of credit is subject to annual increases commensurate with base rent increases pursuant to the Lease Agreement. The letter of credit will expire upon the expiration of the Lease Agreement, but may be subject to reduction or early termination upon the satisfaction of certain conditions as described in the Lease Agreement.
During the fourth quarter of 2021, the Company executed an irrevocable standby letter of credit for $25.0 million through December 31, 2024 in connection with the execution of a product supply agreement with a vendor. As of September 30, 2022, no amounts have been drawn on the letter of credit.