10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended September 30, 2023

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: 000-52024

ALPHATEC HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

Delaware	20-2463898
( State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
1950 Camino Vida Roble, Carlsbad, CA	92008
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (760) 431-9286

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common stock, par value $.0001 per share	ATEC	The NASDAQ Global Select Market

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

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

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

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

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

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

As of October 27, 2023, there were 136,300,664 shares of the registrant’s common stock outstanding.

ALPHATEC HOLDINGS, INC.

QUARTERLY REPORT ON FORM 10-Q

September 30, 2023

Table of Contents

		Page
	PART I – FINANCIAL INFORMATION
Item 1.	Financial Statements	3
	Condensed Consolidated Balance Sheets as of September 30, 2023 (unaudited) and December 31, 2022	3
	Condensed Consolidated Statements of Operations for the Three and Nine Months Ended September 30, 2023 and 2022 (unaudited)	4
	Condensed Consolidated Statements of Comprehensive Loss for the Three and Nine Months Ended September 30, 2023 and 2022 (unaudited)	5
	Condensed Consolidated Statements of Stockholders’ (Deficit) Equity for the Three and Nine Months Ended September 30, 2023 and 2022 (unaudited)	6
	Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2023 and 2022 (unaudited)	8
	Notes to Condensed Consolidated Financial Statements (unaudited)	9
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	27
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	34
Item 4.	Controls and Procedures	34
	PART II – OTHER INFORMATION
Item 1.	Legal Proceedings	36
Item 1A.	Risk Factors	36
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	36
Item 5.	Other Information	36
Item 6.	Exhibits	38
SIGNATURES		39

2

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

ALPHATEC HOLDINGS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except for par value data)

	September 30, 2023			December 31, 2022
Assets	(Unaudited)
Current assets:
Cash and cash equivalents	$	122,526		$	84,696
Accounts receivable, net of allowances of $850 and $679, respectively		64,519			60,060
Inventories		130,672			101,521
Prepaid expenses and other current assets		15,841			9,357
Total current assets		333,558			255,634
Property and equipment, net		133,785			101,952
Right-of-use assets		27,086			28,360
Goodwill		71,555			47,367
Intangible assets, net		102,196			82,781
Other assets		2,041			4,874
Total assets	$	670,221		$	520,968
Liabilities and Stockholders’ Deficit
Current liabilities:
Accounts payable	$	50,104		$	34,742
Accrued expenses and other current liabilities		77,251			72,382
Contract liabilities		13,833			11,956
Short-term debt		1,766			14,948
Current portion of operating lease liabilities		5,090			4,842
Total current liabilities		148,044			138,870
Long-term debt		506,613			349,511
Operating lease liabilities, less current portion		24,496			26,562
Other long-term liabilities		11,626			17,089
Commitments and contingencies (Note 9)
Redeemable preferred stock, $0.0001 par value; 20,000 shares authorized at    September 30, 2023 and December 31, 2022; 3,319 shares issued and outstanding    at September 30, 2023 and December 31, 2022		23,603			23,603
Stockholders' deficit:
Common stock, $0.0001 par value; 200,000 authorized; 123,324 shares issued and 123,311 shares outstanding at September 30, 2023; and 106,673 shares issued and 106,640 shares outstanding at December 31, 2022		12			11
Treasury stock, 1,808 shares, at cost		(25,097	)		(25,097	)
Additional paid-in capital		1,062,919			933,537
Accumulated other comprehensive loss		(12,111	)		(10,794	)
Accumulated deficit		(1,069,884	)		(932,324	)
Total stockholders’ deficit		(44,161	)		(34,667	)
Total liabilities and stockholders’ deficit	$	670,221		$	520,968

See accompanying notes to unaudited condensed consolidated financial statements.

3

ALPHATEC HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(UNAUDITED)

(In thousands, except per share amounts)

	Three Months Ended						Nine Months Ended
	September 30						September 30,
	2023			2022			2023			2022
Revenue:
Revenue from products and services	$	118,262		$	89,839		$	344,292		$	244,908
Revenue from international supply agreement		—			—			—			15
Total revenue		118,262			89,839			344,292			244,923
Cost of sales		38,215			30,323			129,279			80,715
Gross profit		80,047			59,516			215,013			164,208
Operating expenses:
Research and development		20,000			12,111			47,831			32,429
Sales, general and administrative		91,411			75,954			269,960			218,093
Litigation-related expenses		2,715			3,602			12,815			16,629
Amortization of acquired intangible assets		3,873			2,774			10,461			7,181
Transaction-related expenses		278			—			2,178			120
Restructuring expenses		129			45			333			1,704
Total operating expenses		118,406			94,486			343,578			276,156
Operating loss		(38,359	)		(34,970	)		(128,565	)		(111,948	)
Interest expense and other expense, net:
Interest expense, net		(4,459	)		(1,285	)		(12,225	)		(4,176	)
Other income (expense), net		47			(615	)		3,077			(578	)
Total interest expense and other expense, net		(4,412	)		(1,900	)		(9,148	)		(4,754	)
Net loss before taxes		(42,771	)		(36,870	)		(137,713	)		(116,702	)
Income tax benefit		(117	)		(77	)		(153	)		(192	)
Net loss	$	(42,654	)	$	(36,793	)	$	(137,560	)	$	(116,510	)
Net loss per share, basic and diluted	$	(0.35	)	$	(0.35	)	$	(1.18	)	$	(1.14	)
Weighted average shares outstanding, basic and diluted		122,468			104,804			117,026			102,561

See accompanying notes to unaudited condensed consolidated financial statements.

4

ALPHATEC HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(UNAUDITED)

(In thousands)

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2023			2022			2023			2022
Net loss	$	(42,654	)	$	(36,793	)	$	(137,560	)	$	(116,510	)
Foreign currency translation adjustments		(2,600	)		(4,958	)		(1,317	)		(11,550	)
Comprehensive loss	$	(45,254	)	$	(41,751	)	$	(138,877	)	$	(128,060	)

See accompanying notes to unaudited condensed consolidated financial statements.

5

ALPHATEC HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ DEFICIT

(UNAUDITED)

(In thousands)

	Common stock				Additional paid-in			Treasury			Accumulated other comprehensive			Accumulated			Total stockholders’
	Shares		Par Value		capital			stock			loss			deficit			deficit
Balance at December 31, 2022		106,640	$	11	$	933,537		$	(25,097	)	$	(10,794	)	$	(932,324	)	$	(34,667	)
Stock-based compensation		—		—		16,462			—			—			—			16,462
Common stock issued for warrant exercises		4,443		1		456			—			—			—			457
Common stock issued for stock option exercises		349		—		768			—			—			—			768
Common stock issued for vesting of restricted stock    units, net of shares withheld for tax liability		2,027		—		(2,331	)		—			—			—			(2,331	)
Reclassification of equity-based liability		—		—		3,373			—			—			—			3,373
Foreign currency translation adjustments		—		—		—			—			1,105			—			1,105
Net loss		—		—		—			—			—			(43,529	)		(43,529	)
Balance at March 31, 2023		113,459	$	12	$	952,265		$	(25,097	)	$	(9,689	)	$	(975,853	)	$	(58,362	)
Stock-based compensation		—		—		24,194			—			—			—			24,194
Common stock issued for warrant exercises		1,121		—		172			—			—			—			172
Common stock issued for employee stock purchase plan and stock option exercises		274		—		2,277			—			—			—			2,277
Common stock issued for vesting of restricted stock    units, net of shares withheld for tax liability		2,711		—		(2,934	)		—			—			—			(2,934	)
Common stock offering, net of offering costs of $2,489		4,286		—		57,511			—			—			—			57,511
Reclassification of equity-based liability		—		—		188			—			—			—			188
Foreign currency translation adjustments		—		—		—			—			178			—			178
Net loss		—		—		—			—			—			(51,377	)		(51,377	)
Balance at June 30, 2023		121,851	$	12	$	1,033,673		$	(25,097	)	$	(9,511	)	$	(1,027,230	)	$	(28,153	)
Stock-based compensation		—		—		20,073			—			—			—			20,073
Common stock issued for stock option exercises		8		—		38			—			—			—			38
Common stock issued for vesting of restricted stock    units, net of shares withheld for tax liability		784		—		(782	)		—			—			—			(782	)
Common stock offering, net of offering costs of $307		668		—		9,917			—			—			—			9,917
Foreign currency translation adjustments		—		—		—			—			(2,600	)		—			(2,600	)
Net loss		—		—		—			—			—			(42,654	)		(42,654	)
Balance at September 30, 2023		123,311	$	12	$	1,062,919		$	(25,097	)	$	(12,111	)	$	(1,069,884	)	$	(44,161	)

See accompanying notes to unaudited condensed consolidated financial statements.

6

ALPHATEC HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(UNAUDITED)

(In thousands)

	Common stock				Additional paid-in			Treasury			Accumulated other comprehensive			Accumulated			Total stockholders’
	Shares		Par Value		capital			stock			loss			deficit			equity
Balance at December 31, 2021		99,537	$	10	$	892,828		$	(25,097	)	$	(6,036	)	$	(781,031	)	$	80,674
Stock-based compensation		—		—		7,730			—			—			—			7,730
Sales agent equity incentives		199		—		2,178			—			—			—			2,178
Common stock issued for warrant exercises		551		—		1,289			—			—			—			1,289
Common stock issued for stock option exercises		39		—		140			—			—			—			140
Common stock issued for vesting of restricted stock    units, net of shares withheld for tax liability		852		—		(4,751	)		—			—			—			(4,751	)
Foreign currency translation adjustments		—		—		—			—			(1,204	)		—			(1,204	)
Net loss		—		—		—			—			—			(42,616	)		(42,616	)
Balance at March 31, 2022		101,178	$	10	$	899,414		$	(25,097	)	$	(7,240	)	$	(823,647	)	$	43,440
Stock-based compensation		—		—		10,109			—			—			—			10,109
Sales agent equity incentives		20		—		361			—			—			—			361
Common stock issued for conversion of Series A preferred stock		29		—		—			—			—			—			—
Common stock issued for warrant exercises		1,914		1		2,674			—			—			—			2,675
Common stock issued for employee stock purchase plan and stock option exercises		535		—		2,331			—			—			—			2,331
Common stock issued for vesting of restricted stock    units, net of shares withheld for tax liability		819		—		(4,562	)		—			—			—			(4,562	)
Common stock issued for asset acquisition		23		—		250			—			—			—			250
Foreign currency translation adjustments		—		—		—			—			(5,388	)		—			(5,388	)
Net loss		—		—		—			—			—			(37,101	)		(37,101	)
Balance at June 30, 2022		104,518	$	11	$	910,577		$	(25,097	)	$	(12,628	)	$	(860,748	)	$	12,115
Stock-based compensation		—		—		10,011			—			—			—			10,011
Sales agent equity incentives		—		—		178			—			—			—			178
Common stock issued for warrant exercises		49		—		196			—			—			—			196
Common stock issued for employee stock purchase plan and stock option exercises		11		—		47			—			—			—			47
Common stock issued for vesting of restricted stock    units, net of shares withheld for tax liability		406		—		(1,690	)		—			—			—			(1,690	)
Foreign currency translation adjustments		—		—		—			—			(4,958	)		—			(4,958	)
Net loss		—		—		—			—			—			(36,793	)		(36,793	)
Balance at September 30, 2022		104,984	$	11	$	919,319		$	(25,097	)	$	(17,586	)	$	(897,541	)	$	(20,894	)

See accompanying notes to unaudited condensed consolidated financial statements.

7

ALPHATEC HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)

(In thousands)

	Nine Months Ended September 30,
	2023			2022
Operating activities:
Net loss	$	(137,560	)	$	(116,510	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		40,120			29,819
Stock-based compensation		60,729			30,464
Amortization of debt discount and debt issuance costs		2,586			1,470
Amortization of right-of-use assets		2,598			1,927
Write-down for excess and obsolete inventories		9,188			7,023
Loss on disposal of assets		2,209			1,739
Other		1,717			573
Changes in operating assets and liabilities:
Accounts receivable		(4,938	)		(10,133	)
Inventories		(36,087	)		(20,131	)
Prepaid expenses and other current assets		(6,499	)		19
Other assets		(52	)		(840	)
Accounts payable		10,290			7,437
Accrued expenses		7,984			4,144
Lease liabilities		(2,677	)		(1,905	)
Contract liabilities		1,906			(1,133	)
Other long-term liabilities		(4,995	)		(694	)
Net cash used in operating activities		(53,481	)		(66,731	)
Investing activities:
Purchase of property and equipment		(54,791	)		(35,984	)
Purchase of intangible assets		(3,971	)		(7,461	)
Acquisition of business		(55,000	)		—
Net cash used in investing activities		(113,762	)		(43,445	)
Financing activities:
Proceeds from term loan, net of debt discount		148,473			—
Payment of debt issuance costs		(3,321	)		(968	)
Proceeds from common stock offering, net of offering costs		67,428			—
Net cash paid for common stock exercises		(2,334	)		(4,179	)
Proceeds from revolving credit facility		92,000			35,000
Repayment of OCEANEs		(13,315	)		—
Repayment of revolving credit facility		(82,500	)		—
Proceeds from financed insurance		1,328			1,801
Other		(2,411	)		(1,439	)
Net cash provided by financing activities		205,348			30,215
Effect of exchange rate changes on cash		(275	)		(1,175	)
Net increase (decrease) in cash and cash equivalents		37,830			(81,136	)
Cash and cash equivalents at beginning of period		84,696			187,248
Cash and cash equivalents at end of period	$	122,526		$	106,112
Supplemental disclosure of cash flow information:
Cash paid for interest	$	11,202		$	2,723
Cash paid for income taxes	$	247		$	272
Supplemental disclosure of noncash activities:
Financed insurance	$	1,328		$	1,801
Debt issuance costs	$	—		$	347
Purchases of property and equipment in accounts payable and accrued expenses	$	7,156		$	2,019
Purchase of intangible assets	$	171		$	750
Recognition of lease liability	$	424		$	180
Modification of lease liability for lease amendment	$	—		$	4,288
Common stock issued for asset acquisition	$	—		$	250

See accompanying notes to unaudited condensed consolidated financial statements.

8

ALPHATEC HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

1. Organization and Significant Accounting Policies

The Company

Alphatec Holdings, Inc. (the “Company”), through its wholly owned subsidiaries, Alphatec Spine, Inc. (“Alphatec Spine”), SafeOp Surgical, Inc. (“SafeOp”), and EOS imaging S.A.S. (“EOS”), is a medical technology company that designs, develops, and markets technology for the treatment of spinal disorders associated with disease and degeneration, congenital deformities, and trauma. The Company markets its products in the United States of America and internationally via a network of independent sales agents and direct sales representatives.

Basis of Presentation and Principles of Consolidation

The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. The Company translates the financial statements of its foreign subsidiaries using end-of-period exchange rates for assets and liabilities and average exchange rates during each reporting period for results of operations. All intercompany balances and transactions have been eliminated during consolidation.

The accompanying condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Pursuant to these rules and regulations, the Company has condensed or omitted certain information and footnotes it normally includes in its annual consolidated financial statements prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). The unaudited interim condensed consolidated financial statements reflect all adjustments, including normal recurring adjustments which, in the opinion of management, are necessary for a fair statement of the financial position and results of operations for the periods presented. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2022, which are included in the Company’s Annual Report on Form 10-K that was filed with the SEC. Operating results for the nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023, or any other future periods.

Prior-period Adjustment

Subsequent to the issuance of the Company’s consolidated financial statements as of and for the year ended December 31, 2022, the Company identified that a deferred tax liability and additional goodwill related to the acquisition of EOS should have been recorded at the time of the acquisition. The Company corrected the errors in the accompanying condensed consolidated financial statements as of the earliest period presented and has concluded that the correction of these errors is not material to the previously issued financial statements.

9

The correction to the accompanying unaudited condensed consolidated balance sheets, condensed consolidated statements of operations, condensed consolidated statements of comprehensive loss, condensed consolidated statements of stockholders' equity, and condensed consolidated statements of cash flows are as follows (in thousands):

	At December 31, 2021
Condensed Consolidated Statements of Stockholders' Equity	As Reported			Adjustment			As Corrected
Accumulated other comprehensive loss	$	(5,994	)		(42	)	$	(6,036	)
Accumulated deficit	$	(782,325	)		1,294		$	(781,031	)
Total stockholders' equity	$	79,422			1,252		$	80,674
	At December 31, 2022
Condensed Consolidated Balance Sheets	As Reported			Adjustment			As Corrected
Goodwill	$	39,775			7,592		$	47,367
Total assets	$	513,376			7,592		$	520,968
Other long-term liabilities	$	11,543			5,546		$	17,089
Accumulated other comprehensive loss	$	(10,690	)		(104	)	$	(10,794	)
Accumulated deficit	$	(934,474	)		2,150		$	(932,324	)
Total stockholders' deficit	$	(36,713	)		2,046		$	(34,667	)
Total liabilities and stockholders' deficit	$	513,376			7,592		$	520,968

10

										Three Months Ended September 30, 2022									Nine Months Ended September 30, 2022
Condensed Consolidated Statements of Operations										As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected
Income tax provision (benefit)										$	129			(206	)	$	(77	)	$	461			(653	)	$	(192	)
Net loss										$	(36,999	)		206		$	(36,793	)	$	(117,163	)		653		$	(116,510	)
										Three Months Ended September 30, 2022									Nine Months Ended September 30, 2022
Condensed Consolidated Statements of Comprehensive Loss										As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected
Net loss										$	(36,999	)		206		$	(36,793	)	$	(117,163	)		653		$	(116,510	)
Foreign currency translation adjustments										$	(4,851	)		(107	)	$	(4,958	)	$	(11,320	)		(230	)	$	(11,550	)
Comprehensive loss										$	(41,850	)		99		$	(41,751	)	$	(128,483	)		423		$	(128,060	)
	Three Months Ended March 31, 2022									Three Months Ended June 30, 2022									Three Months Ended September 30, 2022
Condensed Consolidated Statements of Stockholders' Equity (Deficit)	As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected
Foreign currency translation adjustments	$	(1,180	)		(24	)	$	(1,204	)	$	(5,289	)		(99	)	$	(5,388	)	$	(4,851	)		(107	)	$	(4,958	)
Net loss	$	(42,844	)		228		$	(42,616	)	$	(37,320	)		219		$	(37,101	)	$	(36,999	)		206		$	(36,793	)
Accumulated other comprehensive loss	$	(7,174	)		(66	)	$	(7,240	)	$	(12,463	)		(165	)	$	(12,628	)	$	(17,314	)		(272	)	$	(17,586	)
Accumulated deficit	$	(825,169	)		1,522		$	(823,647	)	$	(862,489	)		1,741		$	(860,748	)	$	(899,488	)		1,947		$	(897,541	)
Total stockholders' equity (deficit)	$	41,984			1,456		$	43,440		$	10,539			1,576		$	12,115		$	(22,569	)		1,675		$	(20,894	)

	Nine Months Ended September 30, 2022
Condensed Consolidated Statements of Cash Flows	As Reported			Adjustment			As Corrected
Net loss	$	(117,163	)		653		$	(116,510	)
Other long-term liabilities	$	(50	)		(644	)	$	(694	)
Net cash used for operating activities	$	(66,740	)		9		$	(66,731	)
Effect of exchange rate changes on cash	$	(1,166	)		(9	)	$	(1,175	)

11

Reclassification

Certain financial statement line items in the condensed consolidated financial statements for the nine months ended September 30, 2022 have been aggregated to conform to the current year’s presentation.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts of revenues and expenses. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include the useful lives of property and equipment, goodwill, intangible assets, allowances for doubtful accounts, deferred tax assets, inventory, stock-based compensation, revenues, income tax uncertainties, and other contingencies.

Fair Value Measurements

The carrying amount of financial instruments consisting of cash and cash equivalents, accounts receivable, prepaid expenses and other current assets, accounts payable, accrued expenses, and short-term debt included in the Company’s condensed consolidated financial statements are reasonable estimates of fair value due to their short maturities.

Authoritative guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

Level 1: Quoted prices in active markets for identical assets or liabilities.

Level 2: Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active; or other inputs that can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Excess and Obsolete Inventory

Most of the Company’s inventory is comprised of finished goods, which is primarily produced by third-party suppliers. Specialized implants, fixation products, biologics, and disposables are determined by utilizing a standard cost method that includes capitalized variances which approximates the weighted average cost. Imaging equipment and related parts are valued at weighted average cost. Inventories are stated at the lower of cost or net realizable value. The Company reviews the components of its inventory on a periodic basis for excess and obsolescence and adjusts inventory to its net realizable value as necessary.

The Company records a lower of cost or net realizable value (“LCNRV”) inventory reserve for estimated excess and obsolete inventory based upon its expected use of inventory on hand. The Company’s inventory, which consists primarily of specialized implants, fixation products, biologics, and disposables is at risk of obsolescence due to the need to maintain substantial levels of inventory. In order to market its products effectively and meet the demands of interoperative product placement, the Company maintains and provides surgeons and hospitals with a variety of inventory products and sizes. For each surgery, fewer than all components will be consumed. The need to maintain and provide a wide variety of inventory causes inventory to be held that is not likely to be used.

The Company’s estimates and assumptions for excess and obsolete inventory are reviewed and updated on a quarterly basis. The estimates and assumptions are determined primarily based on current usage of inventory and the age of inventory quantities on hand. Additionally, the Company considers recent sales experience to develop assumptions about future demand for its products, while considering product life cycles and new product launches. Increases in the LCNRV reserve for excess and obsolete inventory result in a corresponding charge to cost of sales.

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Revenue Recognition

The Company recognizes revenue from product sales in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Revenue from Contracts with Customers (“Topic 606”). This standard applies to all contracts with customers, except for contracts that are within the scope of other standards, such as leases, insurance, collaboration arrangements, and financial instruments. Under Topic 606, an entity recognizes revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration that the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of Topic 606, the entity performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer.

Sales are derived primarily from the sale of spinal implant products, imaging equipment, and related services to hospitals and medical centers through direct sales representatives and independent sales agents. Revenue is recognized when obligations under the terms of a contract with customers are satisfied, which occurs with the transfer of control of products to customers, either upon shipment of the product or delivery of the product to the customer depending on the shipping terms, or when the products are used in a surgical procedure (implanted in a patient). Revenue from the sale of imaging equipment is recognized as each distinct performance obligation is fulfilled and control transfers to the customer, beginning with shipment or delivery, depending on the terms. Revenue from other distinct performance obligations, such as maintenance on imaging equipment and other imaging-related services, is recognized in the period the service is performed, and makes up less than 10% of the Company’s total revenue. Revenue is measured based on the amount of consideration expected to be received in exchange for the transfer of the goods or services specified in the contract with each customer. In certain cases, the Company does offer the ability for customers to lease its imaging equipment primarily on a non-sales type basis, but such arrangements are immaterial to total revenue in the periods presented. The Company generally does not allow returns of products that have been delivered. Costs incurred by the Company associated with sales contracts with customers are deferred over the performance obligation period and recognized in the same period as the related revenue, except for contracts that complete within one year or less, in which case the associated costs are expensed as incurred. Payment terms for sales to customers may vary but are commensurate with the general business practices in the country of sale.

To the extent that the transaction price includes variable consideration, such as discounts, rebates, and customer payment penalties, the Company estimates the amount of variable consideration that should be included in the transaction price utilizing either the expected value method or the most likely amount method depending on the nature of the variable consideration. Variable consideration is included in the transaction price if, in the Company's judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. Estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of the Company’s anticipated performance and all information that is reasonably available, including historical, current, and forecasted information.

The Company records a contract asset when one or more performance obligations have been completed by the Company and revenue has been recognized, but the customer's payment is contingent on the satisfaction of additional performance obligations. The Company records a contract liability, or deferred revenue, when it has an obligation to provide a product or service to the customer and payment is received in advance of its performance. When the Company sells a product or service with a future performance obligation, revenue is deferred on the unfulfilled performance obligation and recognized over the related performance period. Generally, the Company does not have observable evidence of the standalone selling price related to its future service obligations; therefore, the Company estimates the selling price using an expected cost plus a margin approach. The transaction price is allocated using the relative standalone selling price method. The use of alternative estimates could result in a different amount of revenue deferral.

Recently Adopted and Issued Accounting Pronouncements

In August 2021, the FASB issued Accounting Standards Update ("ASU") No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. The guidance requires application of Topic 606, Revenue from Contracts with Customers to recognize and measure contract assets and contract liabilities acquired in a business combination. ASU No. 2021-08 adds an exception to the general recognition and measurement principle in Topic 805 where assets acquired and liabilities assumed in a business combination, including contract assets and contract liabilities arising from contracts with customers, are measured at fair value on the acquisition date. Under the new guidance, the acquirer will recognize acquired contract assets and contract liabilities as if the acquirer had originated the contract. The standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022, with early adoption permitted. The Company adopted ASU No. 2021-08 as of January 1, 2023, on a prospective basis. The adoption of ASU No. 2021-08 did not have a material impact on the Company's condensed consolidated financial statements and related disclosures.

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In October 2023, the FASB issued ASU No. 2023-06, Disclosure Improvements - Codification Amendments in Response to the SEC’s Disclosure Update and Simplification Initiative. The guidance amends the ASC to incorporate certain disclosure requirements from SEC Release No. 33-10532 Disclosure Update and Simplification issued in 2018. The effective date for each amendment will be the date on which the SEC’s removal of that related disclosure from Regulation S-X or Regulation S-K becomes effective, with early adoption prohibited. ASU No. 2023-06 is not expected to have a material impact on the Company's financial statements.

2. Fair Value Measurements

Assets and liabilities measured at fair value on a recurring basis include the following as of September 30, 2023, and December 31, 2022 (in thousands):

	September 30, 2023
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	62,949		—		—	$	62,949
Total cash equivalents	$	62,949		—		—	$	62,949
	December 31, 2022
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	62,956		—		—	$	62,956
Total cash equivalents	$	62,956		—		—	$	62,956

The Company did not have any transfers of assets and liabilities between the levels of the fair value measurement hierarchy during the periods presented.

Fair Value of Long-term Debt

The fair value, based on a quoted market price (Level 1), of the Company’s outstanding Senior Convertible Notes due 2026 (the "2026 Notes") was approximately $304.6 million at September 30, 2023 and approximately $288.8 million at December 31, 2022.

3. Business Combination

The Company recognizes assets acquired, liabilities assumed, and any noncontrolling interest at fair value at the date of acquisition.

On April 19, 2023, the Company entered into an Asset Purchase Agreement with Integrity Implants Inc. and Fusion Robotics, LLC (collectively, the “Sellers”), whereby the Company acquired certain assets, liabilities, employees, and contracts in connection with the Sellers’ navigation-enabled robotics platform (the “Navigation-enabled Robotics Platform”). The Company paid the Sellers cash consideration of $55.0 million at closing, which represented the total purchase consideration. The acquisition was accounted for as a business combination in accordance with ASC 805 and the Company did not acquire any material assets or assume any material liabilities in connection with the acquisition, excluding intangible assets and goodwill. The acquisition is treated as an asset purchase for income tax purposes; therefore the goodwill recorded is considered deductible for income tax purposes. Refer to Note 6 for further details on intangible assets and goodwill acquired.

The Company is in the process of finalizing the purchase price allocation. While the Company does not expect material changes in the valuation outcome, certain assumptions and findings that were in place at the date of acquisition could result in changes in the purchase price allocation.

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4. Inventories

Inventories reported at the lower of cost or net realizable value consist of the following (in thousands):

	September 30, 2023		December 31, 2022
Raw materials	$	21,449	$	13,928
Work-in-process		4,680		3,032
Finished goods		104,543		84,561
Inventories	$	130,672	$	101,521

5. Property and Equipment, net

Property and equipment, net consist of the following (in thousands, except as indicated):

	Useful lives (in years)	September 30, 2023			December 31, 2022
Surgical instruments	4	$	206,748		$	158,906
Machinery and equipment	7		11,421			9,502
Computer equipment	3		5,388			4,753
Office furniture and equipment	5		5,547			4,760
Leasehold improvements	various		3,797			2,965
Construction in progress	n/a		20,280			15,360
			253,181			196,246
Less: accumulated depreciation    and amortization			(119,396	)		(94,294	)
Property and equipment, net		$	133,785		$	101,952

Total depreciation expense was $10.7 million and $29.0 million for the three and nine months ended September 30, 2023, respectively. Total depreciation expense was $8.0 million and $22.6 million for the three and nine months ended September 30, 2022, respectively. Construction in progress includes costs associated with internal-use software. Construction in progress is not depreciated until placed in service. Property and equipment includes assets under financing leases and the related amortization of assets under financing leases is included in depreciation expense.

6. Goodwill and Intangible Assets

Goodwill

The change in the carrying amount of goodwill during the period ended September 30, 2023 includes the following (in thousands):

December 31, 2022	$	47,367
Additions		24,582
Foreign currency fluctuation		(394	)
September 30, 2023	$	71,555

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Intangible assets, net

Intangible assets, net consist of the following (in thousands, except as indicated):

	Remaining Avg. Useful lives	Gross		Accumulated			Intangible
September 30, 2023:	(in years)	Amount		Amortization			Assets, net
Developed product technology	6	$	102,211	$	(22,512	)	$	79,699
Trademarks and trade names	7		5,359		(1,370	)		3,989
Customer relationships	3		14,141		(8,150	)		5,991
Distribution network	1		2,413		(2,192	)		221
Total amortized intangible assets			124,124		(34,224	)		89,900
Software in development	n/a		5,659					5,659
In-process research and development	n/a		6,637					6,637
Total intangible assets		$	136,420	$	(34,224	)	$	102,196
		.
	Remaining Avg. Useful lives	Gross		Accumulated			Intangible
December 31, 2022:	(in years)	Amount		Amortization			Assets, net
Developed product technology	7	$	75,896	$	(13,420	)	$	62,476
Trademarks and trade names	8		5,421		(987	)		4,434
Customer relationships	4		14,240		(6,906	)		7,334
Distribution network	2		2,413		(2,041	)		372
Total amortized intangible assets			97,970		(23,354	)		74,616
Software in development	n/a		2,503					2,503
In-process research and development	n/a		5,662					5,662
Total intangible assets		$	106,135	$	(23,354	)	$	82,781

During the nine months ended September 30, 2023, in connection with the Company's acquisition of the Robotic-enabled Navigation Platform, as further described in Note 3, the Company recorded additions to definite-lived intangible assets and goodwill in the amount of $26.9 million and $24.6 million, respectively. The intangible asset acquired will be amortized on a straight-line basis over a useful life of seven years.

Total amortization expense attributed to intangible assets was $4.1 million and $11.1 million for the three and nine months ended September 30, 2023, respectively. Total amortization expense attributed to intangible assets was $2.8 million and $7.2 million for the three and nine months ended September 30, 2022, respectively. Software in development is amortized when the projects are completed and the assets are ready for their intended use. In-process research and development assets begin amortizing when the relevant products reach full commercial launch.

Future amortization expense related to intangible assets is as follows (in thousands):

Remainder of 2023	$	5,691
2024		16,064
2025		14,575
2026		14,575
2027		12,703
Thereafter		26,292
	$	89,900

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7. Contract Assets and Contract Liabilities

Contract assets are included within prepaid expenses and other current assets in the condensed consolidated balance sheets. Contract assets relate to contracts with customers for which one or more performance obligations have been completed and revenue has been recognized, but the customer's payment is contingent on the satisfaction of additional performance obligations. The opening and closing balances of the Company's contract assets are as follows (in thousands):

	September 30, 2023		December 31, 2022
Contract assets	$	1,868	$	—

The Company's current and non-current contract liabilities are $13.8 million and $3.5 million, respectively, as of September 30, 2023. The Company's current and non-current contract liabilities were $12.0 million and $3.0 million, respectively, as of December 31, 2022. The non-current contract liabilities balance is included in other long-term liabilities on the condensed consolidated balance sheets. Contract liabilities relates to contracts with customers for which partial or complete payment of the transaction price has been received from the customer and the related obligations must be completed before revenue can be recognized. These amounts primarily relate to undelivered equipment, services, or maintenance agreements. The Company recognized $5.9 million and $17.0 million of revenue from its contract liabilities during the three and nine months ended September 30, 2023, respectively, of which $2.4 million and $9.3 million was recognized from the opening contract liabilities balance, respectively. The Company recognized $6.4 million and $16.5 million of revenue from its contract liabilities during the three and nine months ended September 30, 2022, respectively, of which $3.4 million and $10.3 million was recognized from the opening contract liabilities balance, respectively. The opening and closing balances of the Company’s contract liabilities are as follows (in thousands):

Balance at December 31, 2022	$	15,003
Payments received		19,367
Revenue recognized		(16,998	)
Foreign currency fluctuation		(67	)
Balance at September 30, 2023	$	17,305

8. Debt

Term Loan

On January 6, 2023, the Company entered into a $150.0 million term loan credit facility with Braidwell Transaction Holdings, LLC (the “Braidwell Term Loan”). The Braidwell Term Loan provides for an initial term loan of $100.0 million which was funded on the closing date. On September 28, 2023, the Company drew an additional $50.0 million (the “delayed draw term loan(s)” or the “DDTL”). The Braidwell Term Loan matures on January 6, 2028. As of September 30, 2023, the outstanding balance under the Braidwell Term Loan was $150.0 million.

In conjunction with the issuance of the Braidwell Term Loan, the Company incurred $3.4 million in debt issuance costs and $1.5 million in commitment fees. Commitment fees paid to the lender were accounted for as a debt discount. The debt issuance costs and debt discount were recorded as a direct reduction of the carrying amount of the loan on the condensed consolidated balance sheets and are being amortized over the life of the loan. As of September 30, 2023, debt issuance costs and debt discount, net of accumulated amortization, associated with the Braidwell Term Loan were $3.1 million and $1.4 million, respectively.

Borrowings under the Braidwell Term Loan bear interest at a rate per annum equal to the Term Secured Overnight Financing Rate for such SOFR business day ("SOFR") subject to a 3% floor, plus 5.75%. The applicable interest rate as of September 30, 2023 was 11.2%. The loan agreement includes an undrawn commitment fee, which is calculated as 1% per annum of the average daily undrawn portion of the DDTL. Interest and undrawn commitment fees incurred are due quarterly. The Company is also required to pay fees on any prepayment of the Braidwell Term Loan, ranging from 3.0% to 1.0% depending on the date of prepayment, and a final payment fee equal to 3.25% of the principal amount of the loans drawn. The effective interest rate as of September 30, 2023 was 12.2%. During the three months ended September 30, 2023, the Company recognized interest expense on the Braidwell Term Loan of $3.1 million, which includes $0.1 million for the amortization of debt issuance costs and $0.1 million for the debt discount. During the nine months ended September 30, 2023, the Company recognized interest expense on the Braidwell Term Loan of $8.8 million, which includes $0.3 million for the amortization of debt issuance costs and $0.2 million for the debt discount. Upon the Braidwell Term Loan’s maturity, any outstanding principal balance, unpaid accrued interest, and all other obligations under the Braidwell Term Loan will be due and payable.

17

The Braidwell Term Loan is secured by substantially all of the Company’s assets with the priority interest of the lenders in the Braidwell Term Loan and the Revolving Credit Facility, as defined below, subject to terms of a customary intercreditor agreement, which provides that the lenders under the Revolving Credit Facility have a priority with respect to the Company's accounts receivable, inventory, medical instruments, and items related to the foregoing, and the lenders under the Braidwell Term Loan have priority with respect to the remainder of the Company's assets. The loan agreement contains customary representations and warranties and affirmative and negative covenants. Under the loan agreement, the Company is required to maintain a minimum level of liquidity. The loan agreement also includes certain events of default, and upon the occurrence of such events of default, all outstanding loans under the Braidwell Term Loan may be accelerated and/or the lenders’ commitments terminated. The Company is in compliance with all required financial covenants as of September 30, 2023.

Revolving Credit Facility

In September 2022, the Company entered into a revolving credit facility (the “Revolving Credit Facility”) with entities affiliated with MidCap Financial Trust (“MidCap”). The Revolving Credit Facility provides up to $50.0 million in borrowing capacity to the Company based on a borrowing base. The borrowing base is calculated based on certain accounts receivable and inventory assets. The Company may request a $25.0 million increase in the Revolving Credit Facility for a total commitment of up to $75.0 million. The Revolving Credit Facility matures on the earlier of September 29, 2027, or 90 days prior to the final maturity date of the Company’s 2026 Notes. As of September 30, 2023, the outstanding balance under the Revolving Credit Facility was $46.0 million.

In conjunction with obtaining the Revolving Credit Facility, the Company incurred $1.4 million in debt issuance costs. These costs were capitalized to other assets on the condensed consolidated balance sheets and are being amortized over the life of the Revolving Credit Facility. As of September 30, 2023, debt issuance costs, net of accumulated amortization, associated with the Revolving Credit Facility were $1.1 million.

The outstanding loans under the Revolving Credit Facility bear interest at the sum of Term SOFR plus 3.5% per annum. The applicable interest rate as of September 30, 2023 was 8.9%. The loan agreements include an unused line fee, which is calculated as 0.5% per annum of either the unused Revolving Credit Facility or a minimum balance. Interest and unused line fees incurred are due and capitalized to the outstanding principal balance monthly. The Company recognized interest expense on the Revolving Credit Facility of $0.6 million and $1.5 million, which includes approximately $0.1 million and $0.2 million for the amortization of debt issuance costs, during the three and nine months ended September 30, 2023, respectively. Upon the Revolving Credit Facility’s maturity, any outstanding principal balance, unpaid accrued interest, and all other obligations under the Revolving Credit Facility will be due and payable.

The Revolving Credit Facility contains a lockbox arrangement clause requiring the Company to maintain a lockbox bank account. If the revolving loan availability is less than 30% of the revolving loan limit for five consecutive business days, or the Company is in default, MidCap will apply funds collected from the Company's lockbox account to reduce the outstanding balance of the Revolving Credit Facility. As of September 30, 2023, the Company's loan availability level has not activated lockbox deductions, nor is it expected to for the next 12 months; therefore, the Company has determined that the outstanding balance under the Revolving Credit Facility is long-term debt on the condensed consolidated balance sheets.

The Revolving Credit Facility is secured by substantially all of the Company’s assets with the priority interest of the lenders subject to terms of a customary intercreditor agreement in connection with the Braidwell Term Loan, as described above. The loan agreements and other ancillary documents contain customary representations and warranties and affirmative and negative covenants. Under the loan agreements, the Company is required to maintain a minimum level of liquidity. The loan agreements also include certain events of default, and upon the occurrence of such events of default, all outstanding loans under the Revolving Credit Facility may be accelerated and/or the lenders’ commitments terminated. The Company is in compliance with all required financial covenants as of September 30, 2023.

0.75% Convertible Senior Notes due 2026

In August 2021, the Company issued $316.3 million aggregate principal amount of unsecured 2026 Notes with a stated interest rate of 0.75% and a maturity date of August 1, 2026. Interest on the 2026 Notes is payable semi-annually in arrears on February 1 and August 1 of each year, beginning on February 1, 2022. The net proceeds from the sale of the 2026 Notes were approximately $306.2 million after deducting the initial purchasers’ offering expenses and before cash used for the privately negotiated capped call transactions (the “Capped Call Transactions”), as described below, the repurchase of stock, and the repayment of the outstanding term loan with Squadron Medical Finance Solutions, LLC, and outstanding obligations under an inventory financing agreement. The 2026 Notes do not contain any financial covenants.

18

The 2026 Notes are convertible into shares of the Company’s common stock based upon an initial conversion rate of 54.5316 shares of the Company’s common stock per $1,000 principal amount of 2026 Notes (equivalent to an initial conversion price of approximately $18.34 per share). The conversion rate will be subject to adjustment upon the occurrence of certain specified events, including certain distributions and dividends to all or substantially all of the holders of the Company’s common stock. Based on the terms of the 2026 Notes, when a conversion notice is received, the Company has the option to pay or deliver cash, shares of the Company’s common stock, or a combination thereof.

Holders of the 2026 Notes have the right to convert their notes in certain circumstances and during specified periods. Prior to the close of business on the business day immediately preceding February 2, 2026, holders may convert all or a portion of their 2026 Notes only under the following circumstances: (1) during any calendar quarter (and only during such calendar quarter) if the last reported sale price of the Company’s 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 calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the 5 consecutive business days immediately after any 10 consecutive trading day period (the “measurement period”) in which the trading price per $1,000 principal amount of 2026 Notes for each trading day of the measurement period 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 trading day; or (3) upon the occurrence of specified corporate events. From and after February 2, 2026, holders of the 2026 Notes may convert their notes at any time at their election until the close of business on the second scheduled trading day immediately before the maturity date. As of September 30, 2023, none of the conditions permitting the holders of the 2026 Notes to convert have been met. The 2026 Notes are classified as long-term debt on the condensed consolidated balances sheet as of September 30, 2023.

The 2026 Notes are redeemable, in whole or in part, at the Company’s option at any time, and from time to time, on or after August 6, 2024 and on or before the 40th scheduled trading day immediately before the maturity date, at a cash redemption price equal to the principal amount of the 2026 Notes to be redeemed, plus accrued and unpaid interest, if any, but only if the last reported sale price per share of the Company’s common stock exceeds 130% of the conversion price for a specified period of time. In addition, calling any of the 2026 Notes for redemption will constitute a “make-whole fundamental change” with respect to the redeemable note, in which case the conversion rate applicable to the conversion of the redeemed note will be increased in certain circumstances if such note is converted after it is called for redemption.

If a fundamental change occurs prior to the maturity date, holders may require the Company to repurchase all or a portion of their 2026 Notes for cash at a price equal to 100% of the principal amount of the 2026 Notes plus accrued and unpaid interest. No principal payments are otherwise due on the 2026 Notes prior to maturity.

The Company recorded the full principal amount of the 2026 Notes as a long-term liability net of deferred issuance costs. The annual effective interest rate for the 2026 Notes is 1.4%. The Company recognized interest expense on the 2026 Notes of $1.1 million and $3.3 million, which includes $0.5 million and $1.5 million for the amortization of debt issuance costs, during the three and nine months ended September 30, 2023, respectively. The Company recognized interest expense on the 2026 Notes of $1.1 million and $3.3 million, which includes $0.5 million and $1.5 million for the amortization of debt issuance costs, during the three and nine months ended September 30, 2022, respectively. The Company uses the if-converted method for assumed conversion of the 2026 Notes to compute the weighted-average shares of common stock outstanding for diluted earnings per share, if applicable.

The outstanding principal amount and carrying value of the 2026 Notes consists of the following (in thousands):

	September 30, 2023			December 31, 2022
Principal	$	316,250		$	316,250
Unamortized debt issuance costs		(5,799	)		(7,290	)
Net carrying value	$	310,451		$	308,960

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Capped Call Transactions

In connection with the offering of the 2026 Notes, the Company entered into the Capped Call Transactions with certain financial institutions. The Capped Call Transactions are expected generally to reduce the potential dilution and/or offset the cash payments the Company is required to make in excess of the principal amount of the 2026 Notes upon conversion of the 2026 Notes in the event that the market price per share of the Company’s common stock is greater than the strike price of the Capped Call Transactions with such reduction and/or offset subject to a cap. The Capped Call Transactions have an initial cap price of $27.68 per share of the Company’s common stock, which represents a premium of 100% over the last reported sale price of the Company’s common stock on August 5, 2021, and is subject to certain adjustments under the terms of the Capped Call Transactions. Collectively, the Capped Call Transactions cover, initially, the number of shares of the Company’s common stock underlying the 2026 Notes, subject to anti-dilution adjustments substantially similar to those applicable to the 2026 Notes. The cost of the Capped Call Transactions was approximately $39.9 million.

The Capped Call Transactions are separate transactions and are not part of the terms of the 2026 Notes and will not affect any holder’s rights under the notes. Holders of the 2026 Notes will not have any rights with respect to the Capped Call Transactions.

OCEANE Convertible Bonds

On May 31, 2018, EOS issued 4,344,651 OCEANEs denominated in Euros, due May 2023 for aggregate gross proceeds of $34.3 million (€29.5 million). The OCEANEs were unsecured obligations of EOS, ranked equally with all other unsecured and unsubordinated obligations of EOS, and paid interest at a rate equal to 6% per year, payable semiannually in arrears on May 31 and November 30 of each year, beginning November 30, 2018. The OCEANEs matured on May 31, 2023. The outstanding OCEANEs and accrued interest were paid in full on May 31, 2023. As of September 30, 2023, no OCEANEs remained outstanding. Interest expense was $0.3 million for the nine months ended September 30, 2023. Interest expense was $0.2 million and $0.6 million for the three and nine months ended September 30, 2022, respectively.

Other Debt Agreements

In January and April 2021, prior to the acquisition, EOS obtained two loan agreements, denominated in Euros, under French government sponsored COVID-19 relief initiatives (pret garanti par l’etat or “PGE” loans). Each PGE loan contains a 12-month term and 90% of the principal balance of each loan is state guaranteed. The cost of the state guaranty is 0.25% of the loan amounts. The loans carry an interest-free rate from the commercial banks (€3.3 million) and a 1.75% interest rate from the lender (€1.5 million). The loan capital and loan guaranty costs are payable in full at the end of the 12-month term or the loan may be extended up to 5 additional years. If the Company chooses to extend the debt, the election must be made by the Company between months 8 and 11 of the 12-month term. The extension will carry an interest rate at the banks’ refinancing cost, to be applied from year 2 to year 6 and an increased state guaranty cost (50 to 200 bps, as per a scale with company size and extension year).

In February 2022, the Company extended the maturity for each loan agreement to 2027. Each loan has a 12-month period from the applicable extension date where interest only payments will occur (the “Interest Only Period”). Following the Interest Only Period, monthly and quarterly installments of principal and interest under each loan agreement will be due until the original principal amounts and applicable interest is fully repaid in 2027. The outstanding obligation under each loan as of September 30, 2023 was $3.2 million and $1.4 million (€3.0 million and €1.4 million) at weighted average interest rates of 0.98% and 1.25%, respectively, and weighted average costs of the state guaranty of 0.69% and 1.00%, respectively.

Total Indebtedness

Principal payments remaining on the Company's debt are as follows as of September 30, 2023 (in thousands):

Remainder of 2023	$	676
2024		1,466
2025		1,678
2026		317,748
2027		46,629
Thereafter		154,875
Total		523,072
Less: unamortized debt discount and debt issuance costs		(14,693	)
Total		508,379
Less: current portion of long-term debt		(1,766	)
Long-term debt	$	506,613

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9. Commitments and Contingencies

Leases

The Company determines if an arrangement is a lease at inception by assessing whether there is an identified asset and whether the contract conveys the right to control the use of the identified asset in exchange for consideration over a period of time. If both criteria are met, the Company records the associated lease liability and corresponding right-of-use asset (“ROU asset”) upon commencement of the lease using a discount rate based on the incremental borrowing rate of interest that the Company would borrow on a collateralized basis for an amount equal to the lease payments in a similar economic environment. Any short-term leases defined as twelve months or less or month-to-month leases are excluded and are expensed each month. Total costs associated with these short-term leases are immaterial to all periods presented.

The Company leases office and storage facilities and equipment under various operating and financing lease agreements. The initial terms of these leases range from 1 to 10 years and generally provide for periodic rent increases. The Company’s lease agreements do not contain any material variable lease payments, residual value guarantees or material restrictive covenants. The Company aggregates all lease and non-lease components for each class of underlying assets into a single lease component and variable charges for common area maintenance and other variable costs are recognized as expense as incurred. Total variable costs associated with leases for the three and nine months ended September 30, 2023 were immaterial. The Company had an immaterial amount of financing leases as of September 30, 2023, which is included in property and equipment, net, accrued expenses and other current liabilities, and other long-term liabilities, on the condensed consolidated balance sheets.

The Company occupies 121,541 square feet of office space as its headquarters in Carlsbad, California. On December 4, 2019, the Company entered into a 10-year operating lease that commenced on February 1, 2021 and will terminate on January 31, 2031, subject to two sixty-month options to renew which are not reasonably certain to be exercised. Base rent under the building lease increases annually by 3% throughout the remainder of the lease. On May 11, 2022, the Company entered into a lease amendment for the buildout of additional space within the building which resulted in a lease modification increasing the ROU asset and lease liability.

Future minimum annual lease payments for all operating leases of the Company are as follows as of September 30, 2023 (in thousands):

Remainder of 2023	$	1,348
2024		5,455
2025		5,209
2026		5,152
2027		5,144
Thereafter		13,080
Total undiscounted lease payments		35,388
Less: imputed interest		(5,802	)
Operating lease liabilities		29,586
Less: current portion of operating lease liabilities		(5,090	)
Operating lease liabilities, less current portion	$	24,496

The Company’s weighted average remaining lease term and weighted average discount rate as of September 30, 2023 and December 31, 2022 are as follows:

	September 30, 2023			December 31, 2022
Weighted-average remaining lease term (years)		6.8			7.7
Weighted-average discount rate		5.5	%		5.5	%

Information related to the Company’s operating leases is as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Rent expense	$	1,597	$	1,210	$	4,156	$	3,457
Cash paid for amounts included in measurement of lease liabilities	$	1,317	$	1,032	$	3,767	$	3,183

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Purchase Commitments

The Company is obligated to meet certain minimum purchase commitment requirements with a third-party supplier through December 2026. As of September 30, 2023, the remaining minimum purchase commitment required by the Company under the agreement is $14.3 million.

Litigation

The Company is and may become involved in various legal proceedings arising from its business activities. While management is not aware of any litigation matter that in and of itself would have a material adverse impact on the Company’s condensed consolidated results of operations, cash flows or financial position, litigation is inherently unpredictable, and depending on the nature and timing of a proceeding, an unfavorable resolution could materially affect the Company’s future consolidated results of operations, cash flows or financial position in a particular period. The Company assesses contingencies to determine the degree of probability and range of possible loss for potential accrual or disclosure in the Company’s condensed consolidated financial statements. An estimated loss contingency is accrued in the Company’s condensed consolidated financial statements if it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Because litigation is inherently unpredictable and unfavorable resolutions could occur, assessing contingencies is highly subjective and requires judgments about future events. When evaluating contingencies, the Company may be unable to provide a meaningful estimate due to a number of factors, including the procedural status of the matter in question, the presence of complex or novel legal theories, and/or the ongoing discovery and development of information important to the matters. In addition, damage amounts claimed in litigation against the Company may be unsupported, exaggerated or unrelated to reasonably possible outcomes, and as such are not meaningful indicators of the Company’s potential liability.

Indemnifications

In the normal course of business, the Company enters into agreements under which it occasionally indemnifies third-parties for intellectual property infringement claims or claims arising from breaches of representations or warranties. In addition, from time to time, the Company provides indemnity protection to third-parties for claims relating to past performance arising from undisclosed liabilities, product liabilities, environmental obligations, representations and warranties, and other claims. In these agreements, the scope and amount of remedy, or the period in which claims can be made, may be limited. It is not possible to determine the maximum potential amount of future payments, if any, due under these indemnities due to the conditional nature of the obligations and the unique facts and circumstances involved in each agreement.

In October 2017, NuVasive filed a lawsuit in Delaware Chancery Court against Mr. Miles, the Company’s Chairman and CEO, who was a former officer and board member of NuVasive. The Company itself was not initially a named defendant in this lawsuit; however, in June 2018, NuVasive amended its complaint to add the Company as a defendant. In October 2018, the Delaware Court ordered that NuVasive advance legal fees for Mr. Miles’ defense in the lawsuit, as well as Mr. Miles’ legal fees incurred in pursuing advancement of his fees, pursuant to an indemnification agreement between NuVasive and Mr. Miles. As of September 30, 2023, the Company has not recorded any liability on the condensed consolidated balance sheet related to this matter.

Royalties

The Company has entered into various intellectual property agreements requiring the payment of royalties based on the sale of products that utilize such intellectual property. These royalties primarily relate to products sold by Alphatec Spine and are based on fixed fees or calculated either as a percentage of net sales or on a per-unit sold basis. Royalties are included on the accompanying condensed consolidated statements of operations as a component of cost of sales.

22

10. Stock-Benefit Plans and Equity Transactions

Stock-Based Compensation

The Company has stock-based compensation plans under which it grants stock options, restricted stock units ("RSUs"), and performance restricted stock units ("PRSUs") to officers, directors and third parties. Total stock-based compensation for the periods presented are as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Cost of sales	$	2,369	$	735	$	24,601	$	1,440
Research and development		6,790		1,653		9,587		3,987
Sales, general and administrative		10,914		8,689		26,541		25,037
Total	$	20,073	$	11,077	$	60,729	$	30,464

As of September 30, 2023, there was $70.5 million of unrecognized compensation expense for RSUs and PRSUs to be recognized over a weighted average period of 1.69 years.

The Company has entered into Development Service Agreements for the development of a wide variety of potential products and intellectual property. Under these agreements, future royalty payments for product and/or intellectual property rights may be paid in either cash or restricted shares of the Company’s common stock at the election of the developer, depending on the terms of the agreement. Certain of these agreements were amended to remove the cash royalty option and require settlement in restricted shares of the Company’s common stock. During the three and nine months ended September 30, 2023, the vesting conditions of certain of these awards were deemed probable. Stock-based compensation associated with these awards is included in cost of sales and research and development on the condensed consolidated statements of operations.

Restricted Stock Units and Performance Based Restricted Stock Units Awards

The Company issued approximately 789,000 and 5,714,000 shares of common stock, before net share settlement, upon vesting of RSUs and PRSUs during the three and nine months ended September 30, 2023, respectively. The Company issued approximately 563,000 and 3,103,000 shares of common stock, before net share settlement, upon vesting of RSUs and PRSUs during the three and nine months ended September 30, 2022, respectively.

Employee Stock Purchase Plan

Employees are eligible to participate in the Employee Stock Purchase Plan ("ESPP") approved by its shareholders. During the three months ended September 30, 2023, there were no shares issued under the ESPP. During the nine months ended September 30, 2023, there were approximately 247,000 shares issued under the ESPP. During the three months ended September 30, 2022, there were no shares issued under the ESPP. During the nine months ended September 30, 2022, there were approximately 222,000 shares issued under the ESPP.

The Company estimates the fair value of shares issued to employees under the ESPP using the Black-Scholes option-pricing model. The assumptions used to estimate the fair value of stock options granted and stock purchase rights under the ESPP are as follows:

	Three and Nine Months Ended
	September 30,
	2023		2022
Risk-free interest rate	4.54% - 5.41%		0.07% - 1.54%
Expected dividend yield		—		—
Expected term (years)	0.41 - 0.60			0.50
Volatility	40.87% - 62.77%		50.29% - 64.53%

At the Market Offering

On August 11, 2023, the Company completed an at the market offering of 668,484 shares of the Company’s common stock, $0.0001 par value per share, pursuant to the sales agreement between the Company and Cowen and Company, LLC. The net proceeds from the offering were approximately $9.9 million, including the underwriting discounts and commissions and offering expenses paid by the Company.

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Registered Securities Offering

On April 19, 2023, the Company completed a registered securities offering (the “Offering”) of 4,285,715 shares of the Company’s common stock, $0.0001 par value per share, pursuant to the Underwriting Agreement between the Company and Cowen and Company, LLC, at a price of $14.00 per share. The net proceeds from the Offering were approximately $57.5 million, including the underwriting discounts and commissions and offering expenses paid by the Company.

Warrants Outstanding

2018 PIPE Warrants

The 2018 common stock warrants (the “2018 PIPE Warrants”) had a five-year life and were exercisable by cash or cashless exercise. The 2018 PIPE Warrants expired in May 2023, and no 2018 PIPE warrants remained outstanding as of September 30, 2023. During the nine months ended September 30, 2023, there were approximately 6,311,000 2018 PIPE Warrant exercises for total cash proceeds of $0.4 million. During the three months ended September 30, 2022, there were approximately 14,000 2018 PIPE Warrant cashless exercises. During the nine months ended September 30, 2022, there were approximately 140,000 2018 PIPE Warrant exercises for total cash proceeds of $0.4 million.

SafeOp Surgical Merger Warrants

The SafeOp common stock warrants (the “SafeOp Warrants”), had a five-year life and were exercisable by cash or cashless exercise. The SafeOp Warrants expired in May 2023, and no SafeOp warrants remained outstanding as of September 30, 2023. During the nine months ended September 30, 2023, there were 937,000 cashless SafeOp Warrant exercises. During the three months ended September 30, 2022, there were no SafeOp Warrant exercises. During the nine months ended September 30, 2022, there were approximately 257,000 SafeOp Warrant cashless exercises.

Squadron Medical Warrants

In connection with debt financing entered into with Squadron Medical in 2018, and amended in 2019 and 2020, the Company issued common stock warrants to Squadron Medical and a participant lender (the “Squadron Medical Warrants”). The Squadron Medical Warrants expire in May 2027 and are exercisable by cash exercise. No Squadron Medical Warrants have been exercised as of September 30, 2023.

Executive Warrants

The Company issued warrants to Mr. Patrick S. Miles, the Company’s Chairman and Chief Executive Officer (the “Executive Warrants”). The Executive Warrants had a five-year term and are exercisable by cash or cashless exercise. In October 2022, the term was extended to seven years. No Executive Warrants have been exercised as of September 30, 2023.

A summary of all outstanding warrants for common stock as of September 30, 2023, are as follows (in thousands, except for strike price data):

	Number of Warrants		Strike Price		Expiration
2018 Squadron Medical Warrants		845	$	3.15	May 2027
2019 Squadron Medical Warrants		4,839	$	2.17	May 2027
2020 Squadron Medical Warrants		1,076	$	4.88	May 2027
Executive Warrants		1,327	$	5.00	December 2024
Other(1)		139	$	7.41	Various through February 2026
Total		8,226

(1)Weighted-average strike price.

All outstanding warrants were deemed to qualify for equity classification under authoritative accounting guidance.

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11. Business Segment and Geographic Information

The Company operates in one segment based upon the Company’s organizational structure, the way in which the operations and investments are managed and evaluated by the chief operating decision maker (“CODM”) as well as the lack of available discrete financial information at a level lower than the consolidated level. The Company shares common, centralized support functions which report directly to the CODM and decision-making regarding the Company’s overall operating performance and allocation of Company resources is assessed on a consolidated basis.

Net revenue and property and equipment, net, by geographic region are as follows (in thousands):

	Revenue								Property and equipment, net
	Three Months Ended September 30,				Nine Months Ended September 30,				September 30,		December 31,
(in thousands)	2023		2022		2023		2022		2023		2022
United States	$	110,096	$	84,801	$	317,728	$	229,720	$	132,371	$	99,050
International		8,166		5,038		26,564		15,203		1,414		2,902
Total	$	118,262	$	89,839	$	344,292	$	244,923	$	133,785	$	101,952

12. Net Loss Per Share

Basic net loss per share is calculated by dividing the net loss available to common stockholders by the weighted-average number of common shares outstanding for the period. If applicable, diluted net loss per share attributable to common stockholders is calculated by dividing net loss available to common stockholders by the diluted weighted-average number of common shares outstanding for the period, determined using the treasury-stock method and the if-converted method for convertible debt. For purposes of this calculation, common stock subject to repurchase by the Company, common stock issuable upon conversion or exercise of convertible notes, preferred shares, options, and warrants are considered to be common stock equivalents and are only included in the calculation of diluted earnings per share when their effect is dilutive. Due to the Company’s net loss position, the effect of including common stock equivalents in the earnings per share calculation is anti-dilutive, and therefore not included.

The following table presents the computation of basic and diluted net loss per share (in thousands, except per share amounts):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2023			2022			2023			2022
Numerator:
Net loss	$	(42,654	)	$	(36,793	)	$	(137,560	)	$	(116,510	)
Denominator:
Weighted average common shares outstanding		122,468			104,804			117,026			102,561
Net loss per share, basic and diluted:	$	(0.35	)	$	(0.35	)	$	(1.18	)	$	(1.14	)

The following potentially dilutive shares of common stock were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented (in thousands):

	As of September 30,
	2023		2022
Options to purchase common stock and employee stock purchase plan		2,567		3,142
Unvested restricted stock unit awards		7,606		8,744
Warrants to purchase common stock		8,226		17,486
Senior convertible notes		17,246		17,246
Total		35,645		46,618

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13. Income Taxes

To calculate its interim tax provision, at the end of each interim period the Company estimates the annual effective tax rate, adjusted for discrete items arising in that quarter. The computation of the annual estimated effective tax rate at each interim period requires certain estimates and significant judgment including, but not limited to, the estimated annual taxable income or loss for the year and projections of the proportion of income earned and taxed in foreign jurisdictions. The accounting estimates used to compute the provision for income taxes may change as new events occur, additional information is obtained, or the tax environment changes.

The Company’s effective tax rate from operations was a benefit of 0.27% and 0.11% for the three and nine months ended September 30, 2023, respectively. The Company’s effective tax rate from operations was a benefit of 0.21% and 0.16% for the three and nine months ended September 30, 2022, respectively. The Company’s effective tax rate differs from the federal statutory rate of 21% in each period primarily due to the Company’s net loss position and valuation allowance.

14. Related Party Transactions

The Company purchases inventory from an affiliate of Squadron Capital, LLC (the “Squadron Supplier Affiliate”). David Pelizzon, President and Director of Squadron Capital, LLC, currently serves on the Company’s Board of Directors. For the three and nine months ended September 30, 2023, the Company purchased inventory in the amounts of $5.8 million and $14.1 million, respectively, from the Squadron Supplier Affiliate. For the three and nine months ended September 30, 2022, the Company purchased inventory in the amounts of $2.7 million and $7.7 million, respectively, from the Squadron Supplier Affiliate. As of September 30, 2023, and December 31, 2022, the Company had $4.5 million and $2.4 million, respectively, due to the Squadron Supplier Affiliate, for inventory purchases.

15. Subsequent Events

On October 27, 2023, the Company completed an underwritten public offering (the “Public Offering”) of 14,300,000 shares of the Company’s common stock, $0.0001 par value per share, at a price of $10.50 per share. The gross proceeds from the Public Offering, before deducting the underwriting discounts and commissions and other estimated offering expenses payable by the Company, were approximately $150.1 million. In connection with the Public Offering, the Company has granted the underwriters a 30-day option to purchase an additional 2,145,000 shares of common stock in the offering at the public offering price, less underwriting discounts and commissions. The Company expects to use the net proceeds from the Public Offering to fund general corporate purposes, including working capital, capital expenditures, acquisitions, or research and development.

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

You should read the following management's discussion and analysis of our financial condition and results of operations in conjunction with our unaudited condensed consolidated financial statements and the related notes thereto that appear elsewhere in this Quarterly Report on Form 10-Q and the audited consolidated financial statements and notes thereto and under the heading "Management's Discussion and Analysis of Financial Condition and Results of Operations" in our Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”). In addition to historical information, the following management’s discussion and analysis of our financial condition and results of operations includes forward-looking information that involves risks, uncertainties, and assumptions. Our actual results and the timing of events could differ materially from those anticipated by these forward-looking statements as a result of many factors, such as those set forth under “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2022, and any updates to those risk factors filed from time to time in our subsequent periodic and current reports filed with the SEC.

Overview

We are a medical technology company focused on the design, development, and advancement of technology for better surgical treatment of spinal disorders. Through our wholly owned subsidiaries, Alphatec Spine, Inc., SafeOp Surgical, Inc. and EOS imaging S.A.S., our mission is to revolutionize the approach to spine surgery through clinical distinction. We are focused on developing new approaches that integrate seamlessly with our expanding Alpha InformatiX™ product platform to better inform surgery and to achieve the goal of spine surgery more predictably and reproducibly. We have a broad product portfolio designed to address the spine’s various pathologies. Our ultimate vision is to be the standard bearer in spine.

Our ability to leverage our collective spine experience, coupled with a willingness to invest in every component of the advanced spine approaches that we bring to market has fueled market-leading growth in every year since early 2018. We believe our future success will continue to be propelled by the introduction and traction of the distinct procedures and technologies that our procedural investment thesis engenders.

We market and sell our products through a network of independent sales agents and direct sales representatives. To deliver consistent, predictable growth, we have added, and intend to continue to add, clinically astute and exclusive sales team members to reach untapped surgeons, hospitals, and national accounts and better penetrate existing accounts and territories.

Recent Developments

Public Offering

On October 27, 2023, we completed an underwritten public offering (the “Public Offering”) of 14,300,000 shares of our common stock, $0.0001 par value per share, at a price of $10.50 per share. The gross proceeds from the Public Offering, before deducting the underwriting discounts and commissions and other estimated offering expenses payable by us, were approximately $150.1 million. In connection with the Public Offering, we have granted the underwriters a 30-day option to purchase an additional 2,145,000 shares of common stock in the offering at the public offering price, less underwriting discounts and commissions. We expect to use the net proceeds from the Public Offering to fund general corporate purposes, including working capital, capital expenditures, acquisitions, or research and development.

Asset Purchase Agreement

On April 19, 2023, we entered into an Asset Purchase Agreement with Integrity Implants Inc. and Fusion Robotics, LLC (collectively, the “Sellers”), whereby we acquired certain assets, liabilities, employees, and contracts in connection with the Sellers’ navigation-enabled robotics platform (the “Navigation-enabled Robotics Platform”). As consideration for the purchase of the Navigation-enabled Robotics Platform, we paid the Sellers cash consideration of $55.0 million.

Underwritten Offering

On April 19, 2023, we completed a registered securities offering (the “Offering”) of 4,285,715 shares of our common stock, $0.0001 par value per share, at a price of $14.00 per share. The net proceeds from the Offering were approximately $57.5 million, including the underwriting discounts and commissions and offering expenses paid by us. We expect to use the net proceeds from the Offering to fund general corporate purposes, including working capital, capital expenditures, acquisitions, or research and development, as well as costs related to the purchase and post-closing integration of the Navigation-enabled Robotics Platform and research and development activities related to the Navigation-enabled Robotics Platform.

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Term Loan

On January 6, 2023, we entered into a $150.0 million term loan credit facility with Braidwell Transaction Holdings, LLC (the “Braidwell Term Loan”). The Braidwell Term Loan provides for an initial term loan of $100.0 million which was funded on the closing date. On September 28, 2023, we drew an additional $50.0 million (the “delayed draw term loan(s)” or the “DDTL”). The Braidwell Term Loan matures on January 6, 2028.

In conjunction with the issuance of the Braidwell Term Loan, we incurred $3.4 million in debt issuance costs and $1.5 million in commitment fees. Commitment fees paid to the lender were accounted for as a debt discount. The debt issuance costs and debt discount were recorded as a direct reduction of the carrying amount of the loan on the condensed consolidated balance sheets and are being amortized over the life of the loan.

Borrowings under the Braidwell Term Loan bear interest at a rate per annum equal to the Term Secured Overnight Financing Rate for such SOFR business day ("SOFR") subject to a 3% floor, plus 5.75%. The loan agreement includes an undrawn commitment fee, which is calculated as 1% per annum of the average daily undrawn portion of the DDTL. Interest and undrawn commitment fees incurred are due quarterly. We are also required to pay fees on any prepayment of the Braidwell Term Loan, ranging from 3.0% to 1.0% depending on the date of prepayment, and a final payment equal to 3.25% of the principal amount of the loans drawn. Upon the Braidwell Term Loan’s maturity, any outstanding principal balance, unpaid accrued interest, and all other obligations under the Braidwell Term Loan will be due and payable.

The Braidwell Term Loan is secured by substantially all of our assets with the priority interest of the lenders in the Braidwell Term Loan and the Revolving Credit Facility, subject to terms of a customary intercreditor agreement, which provides that the lenders under the Revolving Credit Facility have a priority with respect to our accounts receivable, inventory, medical instruments, and items related to the foregoing, and the lenders under the Braidwell Term Loan have priority with respect to the remainder of our assets. The loan agreement contains customary representations and warranties and affirmative and negative covenants. Under the loan agreement, we are required to maintain a minimum level of liquidity. The loan agreement also includes certain events of default, and upon the occurrence of such events of default, all outstanding loans under the Braidwell Term Loan may be accelerated and/or the lenders’ commitments terminated.

Revenue and Expense Components

The following is a description of the primary components of our revenue and expenses:

Revenue. We derive our revenue primarily from the sale of spinal surgery implants used in the treatment of spine disorders as well as the sale of medical imaging equipment which is used for surgical planning and post-operative assessment. Spinal implant products include pedicle screws and complementary implants, interbody devices, plates, and tissue-based materials. Medical imaging equipment includes our EOS full-body and weight-bearing x-ray imaging devices, and related services. Our revenue is generated by our direct sales force and independent sales agents. Our products are shipped and invoiced to hospitals and surgical centers. Currently, most of our business is conducted with customers within markets in which we have experience and with payment terms that are customary to our business. We may defer revenue until the time of collection if circumstances related to payment terms, regional market risk or customer history indicate that collectability is not certain.

Cost of sales. Cost of sales consists primarily of direct product costs, royalties, service labor hours, and parts. Our product costs consist primarily of raw materials, component parts, direct labor, and overhead. The product costs of certain of our biologics products include the cost of procuring and processing human tissue. We incur royalties related to the technologies that we license from others and the products that are developed in part by surgeons with whom we collaborate in the product development process.

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Research and development expenses. Research and development expenses consist of costs associated with the design, development, testing, and enhancement of our products. Research and development expenses also include salaries and related employee benefits, research-related overhead expenses, and fees paid to external service providers and development consultants in the form of both cash and equity.

Sales, general and administrative expenses. Sales, general and administrative expenses consist primarily of salaries and related employee benefits, sales commissions and other variable costs, depreciation of our surgical instruments, regulatory affairs, quality assurance costs, professional service fees, travel, medical education, trade show and marketing costs, and insurance expenses.

Litigation-related expenses. Litigation-related expenses consist of costs incurred for our ongoing and settled litigation.

Amortization of acquired intangible assets. Amortization of acquired intangible assets consists of intangible assets acquired in business combinations and asset acquisitions.

Transaction-related expenses. Transaction-related expenses consist of certain costs incurred related primarily to the acquisition and integration of the Robotics-enabled Navigation Platform.

Restructuring expenses. Restructuring expenses primarily consist of severance, social plan benefits and related tax costs incurred in connection with cost rationalization efforts, as well as costs associated with the opening or closing of office and warehouse facilities.

Total interest expense and other expense, net. Total interest expense and other expense, net includes interest income, interest expense, gains and losses from foreign currency exchanges and other non-operating gains and losses.

Income tax provision. Income tax provision primarily consists of an estimate of federal, state, and foreign income taxes based on enacted state and foreign tax rates, as adjusted for allowable credits, deductions, uncertain tax positions, changes in the valuation of our deferred tax assets and liabilities, and changes in tax laws.

Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition and results of operations is based upon our unaudited condensed consolidated financial statements, which have been prepared in accordance with generally accepted accounting principles in the United States of America. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses, and related disclosures. On an on-going basis, we evaluate our estimates and assumptions, including those related to revenue recognition, allowances for accounts receivable, inventories, intangible assets, stock-based compensation, and income taxes. We base our estimates on historical experience and on various other assumptions that we believe to be 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 assumption conditions.

Critical accounting policies are those that, in management’s view, are most important in the portrayal of our financial condition and results of operations. Management believes there have been no material changes during the nine months ended September 30, 2023, to the critical accounting policies discussed in the Management’s Discussion and Analysis of Financial Condition and Results of Operations section of our Annual Report on Form 10-K for the year ended December 31, 2022, filed with the SEC.

Results of Operations

Total revenue

	Three Months Ended September 30,				Change					Nine Months Ended September 30,				Change
(in thousands, except %)	2023		2022		$		%			2023		2022		$			%
Revenue:
Revenue from products and services	$	118,262	$	89,839	$	28,423		32	%	$	344,292	$	244,908	$	99,384			41	%
Revenue from international supply agreement		—		—		—		—			—		15		(15	)		(100	)%
Total revenue	$	118,262	$	89,839	$	28,423		32	%	$	344,292	$	244,923	$	99,369			41	%

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Revenue from products and services increased $28.4 million, or 32%, and $99.4 million, or 41%, during the three and nine months ended September 30, 2023, respectively, compared to the same period in 2022. The increase was primarily due to an increase in product volume that was due to the increase in our surgeon user base, continued expansion of our new product portfolio, and increasing adoption of our technology.

Cost of sales

	Three Months Ended September 30,				Change					Nine Months Ended September 30,				Change
(in thousands, except %)	2023		2022		$		%			2023		2022		$		%
Cost of sales	$	38,215	$	30,323	$	7,892		26	%	$	129,279	$	80,715	$	48,564		60	%

Cost of sales increased $7.9 million, or 26%, for the three months ended September 30, 2023, compared to the same period in 2022. The increase was primarily due to an increase in product volume. Cost of sales increased $48.6 million, or 60%, during the nine months ended September 30, 2023, compared to the same period in 2022. The increase was primarily due to an increase in product volume and an increase in stock-based compensation. We have entered into Development Service Agreements for the development of a wide variety of potential products and intellectual property. Under these agreements, future royalty payments for product and/or intellectual property rights may be paid in either cash or restricted shares of our common stock at the election of the developer, depending on the terms of the agreement. Certain of these agreements were amended to remove the cash royalty option and require settlement in restricted shares of our common stock. During the nine months ended September 30, 2023, the vesting conditions of certain of these amended awards were deemed probable, resulting in an increase in stock-based compensation for the period.

Operating expenses

	Three Months Ended September 30,				Change						Nine Months Ended September 30,				Change
(in thousands, except %)	2023		2022		$			%			2023		2022		$			%
Operating expenses:
Research and development	$	20,000	$	12,111	$	7,889			65	%	$	47,831	$	32,429	$	15,402			47	%
Sales, general and administrative		91,411		75,954		15,457			20	%		269,960		218,093		51,867			24	%
Litigation-related expenses		2,715		3,602		(887	)		(25	)%		12,815		16,629		(3,814	)		(23	)%
Amortization of acquired intangible assets		3,873		2,774		1,099			40	%		10,461		7,181		3,280			46	%
Transaction-related expenses		278		—		278			100	%		2,178		120		2,058			1,715	%
Restructuring expenses		129		45		84			187	%		333		1,704		(1,371	)		(80	)%
Total operating expenses	$	118,406	$	94,486	$	23,920			25	%	$	343,578	$	276,156	$	67,422			24	%

Research and development expenses. Research and development expenses increased $7.9 million, or 65%, and $15.4 million, or 47%, for the three and nine months ended September 30, 2023, respectively, compared to the same period in 2022. The increase was primarily due to an increase in personnel to support the expansion of our new product portfolio and an increase in stock-based compensation associated with Development Service Agreements described above.

Sales, general and administrative expenses. Sales, general and administrative expenses increased $15.5 million, or 20%, and $51.9 million, or 24%, during the three and nine months ended September 30, 2023, respectively, compared to the same period in 2022. The increase was primarily due to higher compensation-related costs and variable selling expenses associated with the increase in revenue, and our continued investment in building our strategic distribution channel. Additionally, we continued to increase our investment in our sales and marketing functions by increasing headcount to support the growth of our business, as well as necessary administrative support.

Litigation-related expenses. Litigation expenses decreased $0.9 million, or 25%, and $3.8 million, or 23%, for the three and nine months ended September 30, 2023, respectively, compared to the same period in 2022. The decrease was primarily related to a decrease in legal fees associated with our previously settled litigation matters.

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Amortization of acquired intangible assets. The increase in amortization of acquired intangible assets is primarily due to in-process research and development assets placed in service in addition to amortization of intangible assets acquired during the nine months ended September 30, 2023.

Transaction-related expenses. The increase in transaction-related expenses for the three and nine months ended September 30, 2023, is primarily due to the closing of the Navigation-enabled Robotics Platform acquisition.

Restructuring expenses. The decrease in restructuring expenses for the nine months ended September 30, 2023 is due to cost rationalization efforts that were completed during the nine months ended September 30, 2022.

Total interest expense and other expense, net

	Three Months Ended September 30,						Change						Nine Months Ended September 30,						Change
(in thousands, except %)	2023			2022			$			%			2023			2022			$			%
Interest expense and other expense, net:
Interest expense, net	$	(4,459	)	$	(1,285	)	$	(3,174	)		247	%	$	(12,225	)	$	(4,176	)	$	(8,049	)		193	%
Other income (expense), net		47			(615	)		662			(108	)%		3,077			(578	)		3,655			(632	)%
Total interest expense and other expense, net	$	(4,412	)	$	(1,900	)	$	(2,512	)		132	%	$	(9,148	)	$	(4,754	)	$	(4,394	)		92	%

The increase in interest expense, net for the three and nine months ended September 30, 2023, compared to the same period in 2022, was primarily due to higher interest rates related to our Revolving Credit Facility and Braidwell Term Loan. The change in other expense, net, compared to the same period in 2022, was primarily due to foreign currency exchange.

Income tax provision

	Three Months Ended September 30,						Change						Nine Months Ended September 30,						Change
(in thousands, except %)	2023			2022			$			%			2023			2022			$		%
Income tax benefit	$	(117	)	$	(77	)	$	(40	)		52	%	$	(153	)	$	(192	)	$	39		(20	)%

The change in the income tax provision for the three and nine months ended September 30, 2023, compared to the same period in 2022, was primarily related to the recognition of income taxes in several jurisdictions.

Liquidity and Capital Resources

Our principal sources of liquidity are our existing cash and cash equivalents, our Revolving Credit Facility, our Braidwell Term Loan and cash from operations. Our liquidity and capital structure are evaluated regularly within the context of our annual operating and strategic planning process. We consider the liquidity necessary to fund our operations, which includes working capital needs, investments in research and development, investments in inventory and instrument sets to support our customers, as well as other operating costs. Our future capital requirements will depend on many factors including our rate of revenue growth, the timing and extent of spending to support development efforts, the expansion of sales, marketing and administrative activities, the timing of introductions of new products and enhancements to existing products, and the international expansions of our business.

As current borrowing sources become due, we may be required to access the capital markets for additional funding. If we are required to access the debt markets, we expect to be able to secure reasonable borrowing rates. As part of our liquidity strategy, we will continue to monitor our current level of spending and cash use as well as our ability to secure additional credit facilities, term loans, or other similar arrangements in light of our spending levels and general financial market conditions.

A substantial portion of our operations are in the U.S., and most of our net sales have been made in the U.S. Accordingly, we do not have material exposures to foreign currency rate fluctuations from operations. However, as our business in markets outside of the U.S. continues to increase, we will be exposed to foreign currency exchange risk related to our foreign operations.

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We do not have any material financial exposure to one customer or one country that would significantly hinder our liquidity. We are and may become involved in various legal proceedings arising from our business activities. While we have no material, undisclosed accruals for pending litigation or claims, litigation is inherently unpredictable, and depending on the nature and timing of a proceeding, an unfavorable resolution could materially affect our future consolidated results of operations, cash flows or financial position in a particular period. We assess contingencies to determine the degree of probability and range of possible loss for potential accrual or disclosure in our condensed consolidated financial statements. An estimated loss contingency is accrued in our condensed consolidated financial statements if it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Assessing contingencies is highly subjective and requires judgments about future events because litigation is inherently unpredictable, and unfavorable resolutions could occur. When evaluating contingencies, we may be unable to provide a meaningful estimate due to a number of factors, including the procedural status of the matter in question, the presence of complex or novel legal theories, and/or the ongoing discovery and development of information important to the matters. In addition, damage amounts claimed in litigation against us may be unsupported, exaggerated, or unrelated to reasonably possible outcomes, and as such are not meaningful indicators of our potential liability. We have disclosed all material accruals for pending litigation or investigations in Note 9, Commitments and Contingencies, in the Notes to Condensed Consolidated Financial Statements included in this Quarterly Report on Form 10-Q.

Cash and cash equivalents were $122.5 million and $84.7 million at September 30, 2023, and December 31, 2022, respectively. We believe that our existing funds, cash generated from our operations and our existing sources of and access to financing are adequate to satisfy our needs for working capital, capital expenditure and debt service requirements, and other business initiatives we plan to strategically pursue.

Summary of Cash Flows

	Nine Months Ended September 30,
(in thousands)	2023			2022
Cash (used in) provided by:
Operating activities	$	(53,481	)	$	(66,731	)
Investing activities		(113,762	)		(43,445	)
Financing activities		205,348			30,215
Effect of exchange rate changes on cash		(275	)		(1,175	)
Net increase (decrease) in cash and cash equivalents	$	37,830		$	(81,136	)

Operating Activities

We used cash of $53.5 million from operating activities for the nine months ended September 30, 2023, which is primarily related to inventory purchases to support the commercial launch of new products and the growth of our business, offset by the timing of cash payments and receipts.

Investing Activities

We used cash of $113.8 million in investing activities for the nine months ended September 30, 2023, which is primarily related to the acquisition of the Navigation-enabled Robotics Platform and the purchase of surgical instruments to support the commercial launch of new products and the growth of our business.

Financing Activities

Financing activities provided $205.3 million of cash for the nine months ended September 30, 2023, which is primarily related to proceeds from the Braidwell Term Loan and the Offering described above, offset by payment of outstanding OCEANEs.

Debt and Commitments

As of September 30, 2023, we had $150.0 million outstanding under the Braidwell Term Loan. The outstanding loans under the Braidwell Term Loan bear interest at the sum of Term SOFR plus 5.75% per annum. The Braidwell Term Loan matures on January 6, 2028.

As of September 30, 2023, we had $46.0 million outstanding under the Revolving Credit Facility. The outstanding loans under the Revolving Credit Facility bear interest at the sum of Term SOFR plus 3.5% per annum. The Revolving Credit Facility matures on the earlier of September 29, 2027, or 90 days prior to the final maturity date of any of our 2026 Notes.

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As of September 30, 2023, we had $316.3 million outstanding under the 2026 Notes. The 2026 Notes accrue interest at a rate of 0.75%, payable semi-annually in arrears on February 1 and August 1 of each year. Prior to maturity in August 2026, the holders of the 2026 Notes may, under certain circumstances, choose to convert their notes into shares of our common stock. Based on the terms we have the option to pay or deliver cash, shares of our common stock, or a combination thereof, when a conversion notice is received.

As of September 30, 2023, we had $4.6 million (€4.4 million) in other debts that are due in monthly and quarterly installments through maturity in 2027.

As of September 30, 2023, we have made $56.7 million in Orthotec settlement payments and we have an outstanding balance of $0.8 million in Orthotec settlement payments (including imputed interest) to be paid by us.

We have an inventory purchase commitment agreement with a third-party supplier, where we are obligated to meet certain minimum purchase commitment requirements through December 2026. As of September 30, 2023, the remaining minimum purchase commitment under the agreement was $14.3 million.

Contractual obligations and commercial commitments

As of September 30, 2023, with the exception of the outstanding balance under the Braidwell Term Loan discussed above, there have been no material changes, outside the normal course of business, in our outstanding contractual obligations from those disclosed within the “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

Off-Balance Sheet Arrangements

We do not have any off-balance sheet arrangements.

Recent Accounting Pronouncements

Aside from the changes disclosed in Note 1 to the Notes to Condensed Consolidated Financial Statements (Unaudited) under the heading “Recently Adopted and Issued Accounting Pronouncements,” if any, there have been no new accounting pronouncements or changes to accounting pronouncements during the nine months ended September 30, 2023, as compared to the recent accounting pronouncements described in our Annual Report on Form 10-K for the year ended December 31, 2022, that was filed with the SEC.

Forward Looking Statements

This Quarterly Report on Form 10-Q incorporates a number of forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”) and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), including statements regarding:

•our estimates regarding anticipated operating losses, future revenue, expenses, capital requirements, uses and sources of cash and liquidity, including our anticipated revenue growth and cost savings;

•our ability to achieve profitability, and the potential need to raise additional funding;

•our ability to ensure that we have effective disclosure controls and procedures;

•our ability to meet, and potential liability from not meeting, any outstanding commitments and contractual obligations;

•our ability to maintain compliance with the quality requirements of the U.S. Food and Drug Administration and similar foreign regulatory requirements;

•our ability to market, improve, grow, commercialize and achieve market acceptance of any of our products or any product candidates that we are developing or may develop in the future;

•our ability to continue to enhance our product offerings, and to commercialize and achieve market acceptance of any of our products or product candidates;

•the effect of any existing or future federal, state or international regulations on our ability to effectively conduct our business;

•our business strategy and our underlying assumptions about market data, demographic trends, reimbursement trends and pricing trends;

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•our ability to maintain an adequate global sales network for our products, including to attract and retain independent sales agents and direct sales representatives;

•our ability to increase the use and promotion of our products by training and educating spine surgeons and our global sales network;

•our ability to attract and retain a qualified management team, as well as other qualified personnel and advisors;

•our ability to enter into licensing and business combination agreements with third parties and to successfully integrate the acquired technology and/or businesses;

•the impact of global economic and political conditions and public health crises on our business and industry; and

•other factors discussed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022 or any document incorporated by reference herein or therein.

Any or all of our forward-looking statements in this Quarterly Report on Form 10-Q may turn out to be wrong. They can be affected by inaccurate assumptions and/or by known or unknown risks and uncertainties. Many factors mentioned in our discussion in this Quarterly Report on Form 10-Q will be important in determining future results. Consequently, no forward-looking statement can be guaranteed. Actual future results may vary materially from expected results.

We also provide a cautionary discussion of risks and uncertainties under “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2022, and any updates to those risk factors filed from time to time in our subsequent periodic and current reports filed with the SEC. These are factors that we think could cause our actual results to differ materially from expected results. Other factors besides those listed there could also adversely affect us.

Without limiting the foregoing, the words “believe,” “anticipate,” “plan,” “expect,” “estimate,” “may,” “will,” “should,” “could,” “would,” “seek,” “intend,” “continue,” “project,” and similar expressions are intended to identify forward-looking statements. There are a number of factors and uncertainties that could cause actual events or results to differ materially from those indicated by such forward-looking statements, many of which are beyond our control, including the factors set forth under “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2022 and any updates to those risk factors filed from time to time in our subsequent periodic and current reports filed with the SEC. In addition, the forward-looking statements contained herein represent our estimate only as of the date of this filing and should not be relied upon as representing our estimate as of any subsequent date. While we may elect to update these forward-looking statements at some point in the future, we specifically disclaim any obligation to do so to reflect actual results, changes in assumptions or changes in other factors affecting such forward-looking statements.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We have evaluated the information required under this item that was disclosed under Item 7A in our Annual Report on Form 10-K for the year ended December 31, 2022, and there have been no significant changes to this information.

Item 4. Controls and Procedures

Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our reports under the Securities Exchange Act of 1934, as amended, or the Exchange Act, is recorded, processed, summarized and reported within the time lines specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can only provide reasonable assurance of achieving the desired control objectives, and in reaching a reasonable level of assurance, management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Under the supervision and with the participation of our management, including our Chief Executive Officer and our Chief Financial Officer, we carried out an evaluation of the effectiveness of our disclosure controls and procedures (as defined in SEC Rules 13a - 15(e) and 15d - 15(e)) as of September 30, 2023. Based on such evaluation, our management has concluded that as of September 30, 2023, our disclosure controls and procedures are effective.

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Changes in Internal Control over Financial Reporting

We are in the process of implementing a new enterprise resource planning (“ERP”) system that affects many of our financial processes and is expected to improve the efficiency and effectiveness of certain financial and business transaction processes, as well as the underlying systems environment. There have been no changes to our internal control over financial reporting during the three months ended September 30, 2023, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

Item 1. Legal Proceedings

For a description of our material legal proceedings, refer to Note 9 of our Notes to Condensed Consolidated Financial Statements included in this Quarterly Report on Form 10-Q, which is incorporated herein by reference.

Item 1A. Risk Factors

There have been no material changes to the risk factors described under Item 1A of our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, filed with the SEC, except for those noted below.

We may fail to realize the anticipated benefits of the Navigation-enabled Robotics Transaction, as defined below.

The success of the acquisition of the Navigation-enabled Robotics Platform (the "Navigation-enabled Robotics Transaction") will depend on, among other things, our ability to incorporate the Navigation-enabled Robotics Platform into our business in a manner that enhances our value proposition to clients and facilitates other growth opportunities. We must successfully include the Navigation-enabled Robotics Platform within our business in a manner that permits these growth opportunities to be realized. In addition, we must achieve the growth opportunities without adversely affecting current revenues and investments in other future growth. If we are unable to successfully achieve these objectives, the anticipated benefits of the Navigation-enabled Robotics Transaction may not be realized fully, if at all, or may take longer to realize than expected. Additionally, management may face challenges in incorporating certain elements and functions of the Navigation-enabled Robotics Platform with our business, and this process may result in additional and unforeseen expenses. The Navigation-enabled Robotics Transaction may also disrupt our ongoing business or cause inconsistencies in standards, controls, procedures and policies that adversely affect our relationships with third party partners, employees, suppliers, customers and others with whom we or the business related to the Navigation-enabled Robotics Platform have business or other dealings or limit our ability to achieve the anticipated benefits of the Navigation-enabled Robotics Transaction. If we are unable to successfully add the Navigation-enabled Robotics Platform to our existing business in an efficient, effective and timely manner, anticipated benefits, including the opportunities for growth it expects from the Navigation-enabled Robotics Transaction, may not be realized fully, if at all, or may take longer to realize than expected, and our cash flow and financial condition may be negatively affected.

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

None.

Item 5. Other Information

A written plan entered into by Evan Bakst, a Director of the Company, on May 23, 2023 for the sale of an aggregate 8,700 shares of common stock terminated in accordance with the plan term on September 15, 2023. The plan was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.

On September 14, 2023, David P. Sponsel, the Company's Executive Vice President, Sales, entered into a written plan for the sale of up to 104,680 shares of common stock. The number of shares of common stock to potentially be sold pursuant to this written plan will depend on the terms of current unvested equity compensation awards granted to Mr. Sponsel and the Company’s achievement relative to applicable performance measures for such current unvested equity compensation awards. In addition, the actual number of shares that will be released to Mr. Sponsel in connection with these awards and sold under Rule 10b5-1(c) will be net of the number of shares withheld to satisfy tax withholding obligations arising from the vesting of such shares and is not yet determinable. The plan is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act, and is scheduled to terminate no later than November 29, 2024.

On September 11, 2023, Craig E. Hunsaker, the Company's Executive Vice President, People and Culture, entered into a written plan for the sale of shares of common stock. The number of shares of common stock to potentially be sold pursuant to this written plan is intended to satisfy tax withholding obligations arising from the vesting of such shares and is not yet determinable. The plan is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act, and is scheduled to terminate no later than March 28, 2024.

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On August 10, 2023, Scott Lish, the Company's Senior Vice President, Research & Development, modified a written plan for the sale of up to 97,585 shares of common stock. The number of shares of common stock to potentially be sold pursuant to this written plan will depend on the terms of current unvested equity compensation awards granted to Mr. Lish and the Company’s achievement relative to applicable performance measures for such current unvested equity compensation awards. In addition, the actual number of shares that will be released to Mr. Lish in connection with these awards and sold under Rule 10b5-1(c) will be net of the number of shares withheld to satisfy tax withholding obligations arising from the vesting of such shares and is not yet determinable. The plan is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act, and is scheduled to terminate no later than March 7, 2025.

On August 10, 2023, Beth Altman, a Director of the Company, terminated a written plan for the sale of an aggregate 12,742 shares of common stock. The plan was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.

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Item 6. Exhibits

Exhibit	Number Exhibit Description
31.1	Certification of Principal Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Principal Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32	Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101	The following materials from the Alphatec Holdings, Inc. Quarterly Report on Form 10-Q for the three and nine months ended September 30, 2023, formatted in iXBRL (Inline eXtensible Business Reporting Language): (i) Condensed Consolidated Balance Sheets (Unaudited) as of September 30, 2023 and December 31, 2022, (ii) Condensed Consolidated Statements of Operations (Unaudited) for the Three and Nine Months Ended September 30, 2023 and 2022, (iii) Condensed Consolidated Statements of Comprehensive Loss (Unaudited) for the Three and Nine Months Ended September 30, 2023 and 2022, (iv) Condensed Consolidated Statements of Stockholders’ (Deficit) Equity (Unaudited) for the Three and Nine Months Ended September 30, 2023 and 2022, (v) Condensed Consolidated Statements of Cash Flows (Unaudited) for the Nine Months Ended September 30, 2023 and 2022, and (vi) Notes to Condensed Consolidated Financial Statements (Unaudited).
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101.INS)

38

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.

ALPHATEC HOLDINGS, INC.
By:	/s/ Patrick S. Miles
	Patrick S. Miles
	Chairman and Chief Executive Officer
	(principal executive officer)
By:	/s/ J. Todd Koning
	J. Todd Koning
	Executive Vice President and Chief Financial Officer
	(principal financial officer and principal accounting officer)

Date: November 6, 2023

39

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

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

I, Patrick S. Miles, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Alphatec Holdings, Inc.;

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

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

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

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

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

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

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

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

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

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

By:	/s/ Patrick S. Miles
	Patrick S. Miles
	Chairman and Chief Executive Officer
	(principal executive officer)
	November 6, 2023

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

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

I, J. Todd Koning, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Alphatec Holdings, Inc.;

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

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

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

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

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

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

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

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

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

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

By:	/s/ J. Todd Koning
	J. Todd Koning
	Executive Vice President and Chief Financial Officer
	(principal financial and accounting officer)
	November 6, 2023

EX-32

Exhibit 32

CERTIFICATION UNDER

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Alphatec Holdings, Inc. (the “Company”) on Form 10-Q for the quarterly period ended September 30, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Patrick S. Miles, Chairman and Chief Executive Officer, certify, to my knowledge, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

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

Dated:	November 6, 2023	/s/ Patrick S. Miles
		Patrick S. Miles
		Chairman and Chief Executive Officer
		(principal executive officer of the Company)

In connection with the Quarterly Report of Alphatec Holdings, Inc. (the “Company”) on Form 10-Q for the quarterly period ended September 30, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, J. Todd Koning, Chief Financial Officer, certify, to my knowledge, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

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

Dated:	November 6, 2023	/s/ J. Todd Koning
		J. Todd Koning
		Executive Vice President and Chief Financial Officer
		(principal financial and accounting officer of the Company)

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Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2023	Oct. 27, 2023
Cover [Abstract]
Entity Registrant Name	ALPHATEC HOLDINGS, INC.
Entity Central Index Key	0001350653
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Trading Symbol	ATEC
Document Period End Date	Sep. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	Q3
Entity Current Reporting Status	Yes
Amendment Flag	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		136,300,664
Entity Shell Company	false
Entity File Number	000-52024
Entity Tax Identification Number	20-2463898
Entity Address, Address Line One	1950 Camino Vida Roble
Entity Address, City or Town	Carlsbad
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92008
City Area Code	760
Local Phone Number	431-9286
Document Quarterly Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	DE
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common stock, par value $.0001 per share
Security Exchange Name	NASDAQ

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 122,526	$ 84,696
Accounts receivable, net of allowances of $850 and $679, respectively	64,519	60,060
Inventories	130,672	101,521
Prepaid expenses and other current assets	15,841	9,357
Total current assets	333,558	255,634
Property and equipment, net	133,785	101,952
Right-of-use assets	27,086	28,360
Goodwill	71,555	47,367
Intangible assets, net	102,196	82,781
Other assets	2,041	4,874
Total assets	670,221	520,968
Current liabilities:
Accounts payable	50,104	34,742
Accrued expenses and other current liabilities	77,251	72,382
Contract liabilities	13,833	11,956
Short-term debt	1,766	14,948
Current portion of operating lease liabilities	5,090	4,842
Total current liabilities	148,044	138,870
Long-term debt	506,613	349,511
Operating lease liabilities, less current portion	24,496	26,562
Other long-term liabilities	11,626	17,089
Commitments and contingencies (Note 9)
Redeemable preferred stock, $0.0001 par value; 20,000 shares authorized at September 30, 2023 and December 31, 2022; 3,319 shares issued and outstanding at September 30, 2023 and December 31, 2022	23,603	23,603
Stockholders' Deficit:
Common stock, $0.0001 par value; 200,000 authorized; 123,324 shares issued and 123,311 shares outstanding at September 30, 2023; and 106,673 shares issued and 106,640 shares outstanding at December 31, 2022	12	11
Treasury stock, 1,808 shares, at cost	(25,097)	(25,097)
Additional paid-in capital	1,062,919	933,537
Accumulated other comprehensive loss	(12,111)	(10,794)
Accumulated deficit	(1,069,884)	(932,324)
Total stockholders' deficit	(44,161)	(34,667)
Total liabilities and stockholders' deficit	$ 670,221	$ 520,968

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Accounts receivable, net of allowances	$ 850	$ 679
Redeemable preferred stock, shares authorized	20,000,000	20,000,000
Redeemable preferred stock, par value (dollars per share)	$ 0.0001	$ 0.0001
Redeemable preferred stock, shares issued	3,319,000	3,319,000
Redeemable preferred stock, shares outstanding	3,319,000	3,319,000
Common stock, par value (dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	123,324,000	106,673,000
Common stock, shares outstanding	123,311,000	106,640,000
Treasury stock, shares	1,808,000	1,808,000

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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue:
Revenue	$ 118,262	$ 89,839	$ 344,292	$ 244,923
Cost of sales	38,215	30,323	129,279	80,715
Gross profit	80,047	59,516	215,013	164,208
Operating expenses:
Research and development	20,000	12,111	47,831	32,429
Sales, general and administrative	91,411	75,954	269,960	218,093
Litigation-related expenses	2,715	3,602	12,815	16,629
Amortization of acquired intangible assets	3,873	2,774	10,461	7,181
Transaction-related expenses	278		2,178	120
Restructuring expenses	129	45	333	1,704
Total operating expenses	118,406	94,486	343,578	276,156
Operating loss	(38,359)	(34,970)	(128,565)	(111,948)
Interest expense and other expense, net:
Interest expense, net	(4,459)	(1,285)	(12,225)	(4,176)
Other income (expense), net	47	(615)	3,077	(578)
Total interest expense and other expense, net	(4,412)	(1,900)	(9,148)	(4,754)
Net loss before taxes	(42,771)	(36,870)	(137,713)	(116,702)
Income tax benefit	(117)	(77)	(153)	(192)
Net loss	$ (42,654)	$ (36,793)	$ (137,560)	$ (116,510)
Net loss per share, basic	$ (0.35)	$ (0.35)	$ (1.18)	$ (1.14)
Net loss per share, diluted	$ (0.35)	$ (0.35)	$ (1.18)	$ (1.14)
Weighted average shares outstanding, basic	122,468	104,804	117,026	102,561
Weighted average shares outstanding, diluted	122,468	104,804	117,026	102,561
Products and Services
Revenue:
Revenue	$ 118,262	$ 89,839	$ 344,292	$ 244,908
International Supply Agreement
Revenue:
Revenue				$ 15

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (42,654)	$ (51,377)	$ (43,529)	$ (36,793)	$ (37,101)	$ (42,616)	$ (137,560)	$ (116,510)
Foreign currency translation adjustments	(2,600)	$ 178	$ 1,105	(4,958)	$ (5,388)	$ (1,204)	(1,317)	(11,550)
Comprehensive loss	$ (45,254)			$ (41,751)			$ (138,877)	$ (128,060)

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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional paid-in capital	Treasury stock	Accumulated other comprehensive loss	Accumulated deficit	Public Offering
Balance at Dec. 31, 2021	$ 80,674	$ 10	$ 892,828	$ (25,097)	$ (6,036)	$ (781,031)
Balance, shares at Dec. 31, 2021		99,537
Stock-based compensation	7,730		7,730
Sales agent equity incentives	2,178		2,178
Sales agent equity incentives, shares		199
Common stock issued for warrant exercises	1,289		1,289
Common stock issued for warrant exercises, shares		551
Common stock issued for stock option exercises	140		140
Common stock issued for stock option exercises, shares		39
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability	(4,751)		(4,751)
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares		852
Foreign currency translation adjustments	(1,204)				(1,204)
Net loss	(42,616)					(42,616)
Balance at Mar. 31, 2022	43,440	$ 10	899,414	(25,097)	(7,240)	(823,647)
Balance, shares at Mar. 31, 2022		101,178
Balance at Dec. 31, 2021	80,674	$ 10	892,828	(25,097)	(6,036)	(781,031)
Balance, shares at Dec. 31, 2021		99,537
Foreign currency translation adjustments	(11,550)
Net loss	(116,510)
Balance at Sep. 30, 2022	(20,894)	$ 11	919,319	(25,097)	(17,586)	(897,541)
Balance, shares at Sep. 30, 2022		104,984
Balance at Mar. 31, 2022	43,440	$ 10	899,414	(25,097)	(7,240)	(823,647)
Balance, shares at Mar. 31, 2022		101,178
Stock-based compensation	10,109		10,109
Sales agent equity incentives	361		361
Sales agent equity incentives, shares		20
Common stock issued for conversion of Series A preferred stock		29
Common stock issued for warrant exercises	2,675	$ 1	2,674
Common stock issued for warrant exercises, shares		1,914
Common stock issued for employee stock purchase plan and stock option exercises, shares		535
Common stock issued for employee stock purchase plan and stock option exercises	2,331		2,331
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability	(4,562)		(4,562)
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares		819
Common stock issued for asset acquisition	250		250
Common stock issued for asset acquisition, shares		23
Foreign currency translation adjustments	(5,388)				(5,388)
Net loss	(37,101)					(37,101)
Balance at Jun. 30, 2022	12,115	$ 11	910,577	(25,097)	(12,628)	(860,748)
Balance, shares at Jun. 30, 2022		104,518
Stock-based compensation	10,011		10,011
Sales agent equity incentives	178		178
Common stock issued for warrant exercises	196		196
Common stock issued for warrant exercises, shares		49
Common stock issued for employee stock purchase plan and stock option exercises, shares		11
Common stock issued for employee stock purchase plan and stock option exercises	47		47
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability	(1,690)		(1,690)
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares		406
Foreign currency translation adjustments	(4,958)				(4,958)
Net loss	(36,793)					(36,793)
Balance at Sep. 30, 2022	(20,894)	$ 11	919,319	(25,097)	(17,586)	(897,541)
Balance, shares at Sep. 30, 2022		104,984
Balance at Dec. 31, 2022	(34,667)	$ 11	933,537	(25,097)	(10,794)	(932,324)
Balance, shares at Dec. 31, 2022		106,640
Stock-based compensation	16,462		16,462
Common stock issued for warrant exercises	457	$ 1	456
Common stock issued for warrant exercises, shares		4,443
Common stock issued for stock option exercises	768		768
Common stock issued for stock option exercises, shares		349
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability	(2,331)		(2,331)
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares		2,027
Reclassification of equity-based liability	3,373		3,373
Foreign currency translation adjustments	1,105				1,105
Net loss	(43,529)					(43,529)
Balance at Mar. 31, 2023	(58,362)	$ 12	952,265	(25,097)	(9,689)	(975,853)
Balance, shares at Mar. 31, 2023		113,459
Balance at Dec. 31, 2022	(34,667)	$ 11	933,537	(25,097)	(10,794)	(932,324)
Balance, shares at Dec. 31, 2022		106,640
Foreign currency translation adjustments	(1,317)
Net loss	(137,560)
Balance at Sep. 30, 2023	(44,161)	$ 12	1,062,919	(25,097)	(12,111)	(1,069,884)
Balance, shares at Sep. 30, 2023		123,311
Balance at Mar. 31, 2023	(58,362)	$ 12	952,265	(25,097)	(9,689)	(975,853)
Balance, shares at Mar. 31, 2023		113,459
Stock-based compensation	24,194		24,194
Common stock issued for warrant exercises	172		$ 172
Common stock issued for warrant exercises, shares		1,121
Common stock issued for employee stock purchase plan and stock option exercises, shares		274	2,277
Common stock issued for employee stock purchase plan and stock option exercises	$ 2,277
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares	(2,934)	2,711	(2,934)
Common stock offering, net of offering costs			$ 57,511				$ 57,511
Common stock offering, net of offering costs, shares		4,286
Reclassification of equity-based liability	$ 188		188
Foreign currency translation adjustments	178				178
Net loss	(51,377)					(51,377)
Balance at Jun. 30, 2023	(28,153)	$ 12	1,033,673	(25,097)	(9,511)	(1,027,230)
Balance, shares at Jun. 30, 2023		121,851
Stock-based compensation	20,073		20,073
Common stock issued for stock option exercises	38		38
Common stock issued for stock option exercises, shares		8
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability	(782)		(782)
Common stock issued for vesting of restricted stock units, net of shares withheld for tax liability, shares		784
Common stock offering, net of offering costs	9,917		9,917
Common stock offering, net of offering costs, shares		668
Foreign currency translation adjustments	(2,600)				(2,600)
Net loss	(42,654)					(42,654)
Balance at Sep. 30, 2023	$ (44,161)	$ 12	$ 1,062,919	$ (25,097)	$ (12,111)	$ (1,069,884)
Balance, shares at Sep. 30, 2023		123,311

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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Jun. 30, 2023
Common stock, offering costs	$ 307	$ 2,489

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating activities:
Net loss	$ (137,560)	$ (116,510)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	40,120	29,819
Stock-based compensation	60,729	30,464
Amortization of debt discount and debt issuance costs	2,586	1,470
Amortization of right-of-use assets	2,598	1,927
Write-down for excess and obsolete inventories	9,188	7,023
Loss on disposal of assets	2,209	1,739
Other	1,717	573
Changes in operating assets and liabilities:
Accounts receivable	(4,938)	(10,133)
Inventories	(36,087)	(20,131)
Prepaid expenses and other current assets	(6,499)	19
Other assets	(52)	(840)
Accounts payable	10,290	7,437
Accrued expenses	7,984	4,144
Lease liabilities	(2,677)	(1,905)
Contract liabilities	1,906	(1,133)
Other long-term liabilities	(4,995)	(694)
Net cash used in operating activities	(53,481)	(66,731)
Investing activities:
Purchase of property and equipment	(54,791)	(35,984)
Purchase of intangible assets	(3,971)	(7,461)
Acquisition of business	(55,000)
Net cash used in investing activities	(113,762)	(43,445)
Financing activities:
Proceeds from term loan, net of debt discount	148,473
Payment of debt issuance costs	(3,321)	(968)
Proceeds from common stock offering, net of offering costs	67,428
Net cash paid for common stock exercises	(2,334)	(4,179)
Proceeds from revolving credit facility	92,000	35,000
Repayment of OCEANEs	(13,315)
Repayment of revolving credit facility	(82,500)
Proceeds from financed insurance	1,328	1,801
Other	(2,411)	(1,439)
Net cash provided by financing activities	205,348	30,215
Effect of exchange rate changes on cash	(275)	(1,175)
Net increase (decrease) in cash and cash equivalents	37,830	(81,136)
Cash and cash equivalents at beginning of period	84,696	187,248
Cash and cash equivalents at end of period	122,526	106,112
Supplemental disclosure of cash flow information:
Cash paid for interest	11,202	2,723
Cash paid for income taxes	247	272
Supplemental disclosure of noncash activities:
Financed insurance	1,328	1,801
Debt issuance costs		347
Purchases of property and equipment in accounts payable and accrued expenses	7,156	2,019
Purchase of intangible assets	171	750
Recognition of lease liability	$ 424	180
Modification of lease liability for lease amendment		4,288
Common stock issued for asset acquisition		$ 250

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Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ (42,654)	$ (51,377)	$ (43,529)	$ (36,793)	$ (37,101)	$ (42,616)	$ (137,560)	$ (116,510)

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Insider Trading Arrangements

9 Months Ended

Sep. 30, 2023

shares

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

A written plan entered into by Evan Bakst, a Director of the Company, on May 23, 2023 for the sale of an aggregate 8,700 shares of common stock terminated in accordance with the plan term on September 15, 2023. The plan was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.

On September 14, 2023, David P. Sponsel, the Company's Executive Vice President, Sales, entered into a written plan for the sale of up to 104,680 shares of common stock. The number of shares of common stock to potentially be sold pursuant to this written plan will depend on the terms of current unvested equity compensation awards granted to Mr. Sponsel and the Company’s achievement relative to applicable performance measures for such current unvested equity compensation awards. In addition, the actual number of shares that will be released to Mr. Sponsel in connection with these awards and sold under Rule 10b5-1(c) will be net of the number of shares withheld to satisfy tax withholding obligations arising from the vesting of such shares and is not yet determinable. The plan is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act, and is scheduled to terminate no later than November 29, 2024.

On September 11, 2023, Craig E. Hunsaker, the Company's Executive Vice President, People and Culture, entered into a written plan for the sale of shares of common stock. The number of shares of common stock to potentially be sold pursuant to this written plan is intended to satisfy tax withholding obligations arising from the vesting of such shares and is not yet determinable. The plan is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act, and is scheduled to terminate no later than March 28, 2024.

On August 10, 2023, Scott Lish, the Company's Senior Vice President, Research & Development, modified a written plan for the sale of up to 97,585 shares of common stock. The number of shares of common stock to potentially be sold pursuant to this written plan will depend on the terms of current unvested equity compensation awards granted to Mr. Lish and the Company’s achievement relative to applicable performance measures for such current unvested equity compensation awards. In addition, the actual number of shares that will be released to Mr. Lish in connection with these awards and sold under Rule 10b5-1(c) will be net of the number of shares withheld to satisfy tax withholding obligations arising from the vesting of such shares and is not yet determinable. The plan is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act, and is scheduled to terminate no later than March 7, 2025.

On August 10, 2023, Beth Altman, a Director of the Company, terminated a written plan for the sale of an aggregate 12,742 shares of common stock. The plan was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.

Evan Bakst

Trading Arrangements, by Individual

Name

Evan Bakst

Title

Director

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

May 23, 2023

Termination Date

September 15, 2023

Aggregate Available

8,700

David P. Sponsel

Trading Arrangements, by Individual

Name

David P. Sponsel

Title

Executive Vice President

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

September 14, 2023

Termination Date

November 29, 2024

Aggregate Available

104,680

Craig E. Hunsaker

Trading Arrangements, by Individual

Name

Craig E. Hunsaker

Title

Executive Vice President

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

September 11, 2023

Termination Date

March 28, 2024

Scott Lish

Trading Arrangements, by Individual

Name

Scott Lish

Title

Senior Vice President

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

August 10, 2023

Termination Date

March 7, 2025

Aggregate Available

97,585

Beth Altman

Trading Arrangements, by Individual

Name

Beth Altman

Title

Director

Rule 10b5-1 Arrangement Adopted

true

Termination Date

August 10, 2023

Aggregate Available

12,742

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Organization and Significant Accounting Policies

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Organization and Significant Accounting Policies

1. Organization and Significant Accounting Policies

The Company

Alphatec Holdings, Inc. (the “Company”), through its wholly owned subsidiaries, Alphatec Spine, Inc. (“Alphatec Spine”), SafeOp Surgical, Inc. (“SafeOp”), and EOS imaging S.A.S. (“EOS”), is a medical technology company that designs, develops, and markets technology for the treatment of spinal disorders associated with disease and degeneration, congenital deformities, and trauma. The Company markets its products in the United States of America and internationally via a network of independent sales agents and direct sales representatives.

Basis of Presentation and Principles of Consolidation

The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. The Company translates the financial statements of its foreign subsidiaries using end-of-period exchange rates for assets and liabilities and average exchange rates during each reporting period for results of operations. All intercompany balances and transactions have been eliminated during consolidation.

The accompanying condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Pursuant to these rules and regulations, the Company has condensed or omitted certain information and footnotes it normally includes in its annual consolidated financial statements prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). The unaudited interim condensed consolidated financial statements reflect all adjustments, including normal recurring adjustments which, in the opinion of management, are necessary for a fair statement of the financial position and results of operations for the periods presented. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2022, which are included in the Company’s Annual Report on Form 10-K that was filed with the SEC. Operating results for the nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023, or any other future periods.

Prior-period Adjustment

Subsequent to the issuance of the Company’s consolidated financial statements as of and for the year ended December 31, 2022, the Company identified that a deferred tax liability and additional goodwill related to the acquisition of EOS should have been recorded at the time of the acquisition. The Company corrected the errors in the accompanying condensed consolidated financial statements as of the earliest period presented and has concluded that the correction of these errors is not material to the previously issued financial statements.

The correction to the accompanying unaudited condensed consolidated balance sheets, condensed consolidated statements of operations, condensed consolidated statements of comprehensive loss, condensed consolidated statements of stockholders' equity, and condensed consolidated statements of cash flows are as follows (in thousands):

	At December 31, 2021
Condensed Consolidated Statements of Stockholders' Equity	As Reported			Adjustment			As Corrected
Accumulated other comprehensive loss	$	(5,994	)		(42	)	$	(6,036	)
Accumulated deficit	$	(782,325	)		1,294		$	(781,031	)
Total stockholders' equity	$	79,422			1,252		$	80,674
	At December 31, 2022
Condensed Consolidated Balance Sheets	As Reported			Adjustment			As Corrected
Goodwill	$	39,775			7,592		$	47,367
Total assets	$	513,376			7,592		$	520,968
Other long-term liabilities	$	11,543			5,546		$	17,089
Accumulated other comprehensive loss	$	(10,690	)		(104	)	$	(10,794	)
Accumulated deficit	$	(934,474	)		2,150		$	(932,324	)
Total stockholders' deficit	$	(36,713	)		2,046		$	(34,667	)
Total liabilities and stockholders' deficit	$	513,376			7,592		$	520,968

										Three Months Ended September 30, 2022									Nine Months Ended September 30, 2022
Condensed Consolidated Statements of Operations										As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected
Income tax provision (benefit)										$	129			(206	)	$	(77	)	$	461			(653	)	$	(192	)
Net loss										$	(36,999	)		206		$	(36,793	)	$	(117,163	)		653		$	(116,510	)
										Three Months Ended September 30, 2022									Nine Months Ended September 30, 2022
Condensed Consolidated Statements of Comprehensive Loss										As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected
Net loss										$	(36,999	)		206		$	(36,793	)	$	(117,163	)		653		$	(116,510	)
Foreign currency translation adjustments										$	(4,851	)		(107	)	$	(4,958	)	$	(11,320	)		(230	)	$	(11,550	)
Comprehensive loss										$	(41,850	)		99		$	(41,751	)	$	(128,483	)		423		$	(128,060	)
	Three Months Ended March 31, 2022									Three Months Ended June 30, 2022									Three Months Ended September 30, 2022
Condensed Consolidated Statements of Stockholders' Equity (Deficit)	As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected
Foreign currency translation adjustments	$	(1,180	)		(24	)	$	(1,204	)	$	(5,289	)		(99	)	$	(5,388	)	$	(4,851	)		(107	)	$	(4,958	)
Net loss	$	(42,844	)		228		$	(42,616	)	$	(37,320	)		219		$	(37,101	)	$	(36,999	)		206		$	(36,793	)
Accumulated other comprehensive loss	$	(7,174	)		(66	)	$	(7,240	)	$	(12,463	)		(165	)	$	(12,628	)	$	(17,314	)		(272	)	$	(17,586	)
Accumulated deficit	$	(825,169	)		1,522		$	(823,647	)	$	(862,489	)		1,741		$	(860,748	)	$	(899,488	)		1,947		$	(897,541	)
Total stockholders' equity (deficit)	$	41,984			1,456		$	43,440		$	10,539			1,576		$	12,115		$	(22,569	)		1,675		$	(20,894	)

	Nine Months Ended September 30, 2022
Condensed Consolidated Statements of Cash Flows	As Reported			Adjustment			As Corrected
Net loss	$	(117,163	)		653		$	(116,510	)
Other long-term liabilities	$	(50	)		(644	)	$	(694	)
Net cash used for operating activities	$	(66,740	)		9		$	(66,731	)
Effect of exchange rate changes on cash	$	(1,166	)		(9	)	$	(1,175	)

Reclassification

Certain financial statement line items in the condensed consolidated financial statements for the nine months ended September 30, 2022 have been aggregated to conform to the current year’s presentation.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts of revenues and expenses. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include the useful lives of property and equipment, goodwill, intangible assets, allowances for doubtful accounts, deferred tax assets, inventory, stock-based compensation, revenues, income tax uncertainties, and other contingencies.

Fair Value Measurements

The carrying amount of financial instruments consisting of cash and cash equivalents, accounts receivable, prepaid expenses and other current assets, accounts payable, accrued expenses, and short-term debt included in the Company’s condensed consolidated financial statements are reasonable estimates of fair value due to their short maturities.

Authoritative guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

Level 1: Quoted prices in active markets for identical assets or liabilities.

Level 2: Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active; or other inputs that can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Excess and Obsolete Inventory

Most of the Company’s inventory is comprised of finished goods, which is primarily produced by third-party suppliers. Specialized implants, fixation products, biologics, and disposables are determined by utilizing a standard cost method that includes capitalized variances which approximates the weighted average cost. Imaging equipment and related parts are valued at weighted average cost. Inventories are stated at the lower of cost or net realizable value. The Company reviews the components of its inventory on a periodic basis for excess and obsolescence and adjusts inventory to its net realizable value as necessary.

The Company records a lower of cost or net realizable value (“LCNRV”) inventory reserve for estimated excess and obsolete inventory based upon its expected use of inventory on hand. The Company’s inventory, which consists primarily of specialized implants, fixation products, biologics, and disposables is at risk of obsolescence due to the need to maintain substantial levels of inventory. In order to market its products effectively and meet the demands of interoperative product placement, the Company maintains and provides surgeons and hospitals with a variety of inventory products and sizes. For each surgery, fewer than all components will be consumed. The need to maintain and provide a wide variety of inventory causes inventory to be held that is not likely to be used.

The Company’s estimates and assumptions for excess and obsolete inventory are reviewed and updated on a quarterly basis. The estimates and assumptions are determined primarily based on current usage of inventory and the age of inventory quantities on hand. Additionally, the Company considers recent sales experience to develop assumptions about future demand for its products, while considering product life cycles and new product launches. Increases in the LCNRV reserve for excess and obsolete inventory result in a corresponding charge to cost of sales.

Revenue Recognition

The Company recognizes revenue from product sales in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Revenue from Contracts with Customers (“Topic 606”). This standard applies to all contracts with customers, except for contracts that are within the scope of other standards, such as leases, insurance, collaboration arrangements, and financial instruments. Under Topic 606, an entity recognizes revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration that the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of Topic 606, the entity performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer.

Sales are derived primarily from the sale of spinal implant products, imaging equipment, and related services to hospitals and medical centers through direct sales representatives and independent sales agents. Revenue is recognized when obligations under the terms of a contract with customers are satisfied, which occurs with the transfer of control of products to customers, either upon shipment of the product or delivery of the product to the customer depending on the shipping terms, or when the products are used in a surgical procedure (implanted in a patient). Revenue from the sale of imaging equipment is recognized as each distinct performance obligation is fulfilled and control transfers to the customer, beginning with shipment or delivery, depending on the terms. Revenue from other distinct performance obligations, such as maintenance on imaging equipment and other imaging-related services, is recognized in the period the service is performed, and makes up less than 10% of the Company’s total revenue. Revenue is measured based on the amount of consideration expected to be received in exchange for the transfer of the goods or services specified in the contract with each customer. In certain cases, the Company does offer the ability for customers to lease its imaging equipment primarily on a non-sales type basis, but such arrangements are immaterial to total revenue in the periods presented. The Company generally does not allow returns of products that have been delivered. Costs incurred by the Company associated with sales contracts with customers are deferred over the performance obligation period and recognized in the same period as the related revenue, except for contracts that complete within one year or less, in which case the associated costs are expensed as incurred. Payment terms for sales to customers may vary but are commensurate with the general business practices in the country of sale.

To the extent that the transaction price includes variable consideration, such as discounts, rebates, and customer payment penalties, the Company estimates the amount of variable consideration that should be included in the transaction price utilizing either the expected value method or the most likely amount method depending on the nature of the variable consideration. Variable consideration is included in the transaction price if, in the Company's judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. Estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of the Company’s anticipated performance and all information that is reasonably available, including historical, current, and forecasted information.

The Company records a contract asset when one or more performance obligations have been completed by the Company and revenue has been recognized, but the customer's payment is contingent on the satisfaction of additional performance obligations. The Company records a contract liability, or deferred revenue, when it has an obligation to provide a product or service to the customer and payment is received in advance of its performance. When the Company sells a product or service with a future performance obligation, revenue is deferred on the unfulfilled performance obligation and recognized over the related performance period. Generally, the Company does not have observable evidence of the standalone selling price related to its future service obligations; therefore, the Company estimates the selling price using an expected cost plus a margin approach. The transaction price is allocated using the relative standalone selling price method. The use of alternative estimates could result in a different amount of revenue deferral.

Recently Adopted and Issued Accounting Pronouncements

In August 2021, the FASB issued Accounting Standards Update ("ASU") No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. The guidance requires application of Topic 606, Revenue from Contracts with Customers to recognize and measure contract assets and contract liabilities acquired in a business combination. ASU No. 2021-08 adds an exception to the general recognition and measurement principle in Topic 805 where assets acquired and liabilities assumed in a business combination, including contract assets and contract liabilities arising from contracts with customers, are measured at fair value on the acquisition date. Under the new guidance, the acquirer will recognize acquired contract assets and contract liabilities as if the acquirer had originated the contract. The standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022, with early adoption permitted. The Company adopted ASU No. 2021-08 as of January 1, 2023, on a prospective basis. The adoption of ASU No. 2021-08 did not have a material impact on the Company's condensed consolidated financial statements and related disclosures.

In October 2023, the FASB issued ASU No. 2023-06, Disclosure Improvements - Codification Amendments in Response to the SEC’s Disclosure Update and Simplification Initiative. The guidance amends the ASC to incorporate certain disclosure requirements from SEC Release No. 33-10532 Disclosure Update and Simplification issued in 2018. The effective date for each amendment will be the date on which the SEC’s removal of that related disclosure from Regulation S-X or Regulation S-K becomes effective, with early adoption prohibited. ASU No. 2023-06 is not expected to have a material impact on the Company's financial statements.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

2. Fair Value Measurements

Assets and liabilities measured at fair value on a recurring basis include the following as of September 30, 2023, and December 31, 2022 (in thousands):

	September 30, 2023
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	62,949		—		—	$	62,949
Total cash equivalents	$	62,949		—		—	$	62,949
	December 31, 2022
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	62,956		—		—	$	62,956
Total cash equivalents	$	62,956		—		—	$	62,956

The Company did not have any transfers of assets and liabilities between the levels of the fair value measurement hierarchy during the periods presented.

Fair Value of Long-term Debt

The fair value, based on a quoted market price (Level 1), of the Company’s outstanding Senior Convertible Notes due 2026 (the "2026 Notes") was approximately $304.6 million at September 30, 2023 and approximately $288.8 million at December 31, 2022.

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Business Combination

9 Months Ended

Sep. 30, 2023

Business Combinations [Abstract]

Business Combination

3. Business Combination

The Company recognizes assets acquired, liabilities assumed, and any noncontrolling interest at fair value at the date of acquisition.

On April 19, 2023, the Company entered into an Asset Purchase Agreement with Integrity Implants Inc. and Fusion Robotics, LLC (collectively, the “Sellers”), whereby the Company acquired certain assets, liabilities, employees, and contracts in connection with the Sellers’ navigation-enabled robotics platform (the “Navigation-enabled Robotics Platform”). The Company paid the Sellers cash consideration of $55.0 million at closing, which represented the total purchase consideration. The acquisition was accounted for as a business combination in accordance with ASC 805 and the Company did not acquire any material assets or assume any material liabilities in connection with the acquisition, excluding intangible assets and goodwill. The acquisition is treated as an asset purchase for income tax purposes; therefore the goodwill recorded is considered deductible for income tax purposes. Refer to Note 6 for further details on intangible assets and goodwill acquired.

The Company is in the process of finalizing the purchase price allocation. While the Company does not expect material changes in the valuation outcome, certain assumptions and findings that were in place at the date of acquisition could result in changes in the purchase price allocation.

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Inventories

9 Months Ended

Sep. 30, 2023

Inventory Disclosure [Abstract]

Inventories

4. Inventories

Inventories reported at the lower of cost or net realizable value consist of the following (in thousands):

	September 30, 2023		December 31, 2022
Raw materials	$	21,449	$	13,928
Work-in-process		4,680		3,032
Finished goods		104,543		84,561
Inventories	$	130,672	$	101,521

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Property and Equipment, net

9 Months Ended

Sep. 30, 2023

Property, Plant and Equipment [Abstract]

Property and Equipment, net

5. Property and Equipment, net

Property and equipment, net consist of the following (in thousands, except as indicated):

	Useful lives (in years)	September 30, 2023			December 31, 2022
Surgical instruments	4	$	206,748		$	158,906
Machinery and equipment	7		11,421			9,502
Computer equipment	3		5,388			4,753
Office furniture and equipment	5		5,547			4,760
Leasehold improvements	various		3,797			2,965
Construction in progress	n/a		20,280			15,360
			253,181			196,246
Less: accumulated depreciation    and amortization			(119,396	)		(94,294	)
Property and equipment, net		$	133,785		$	101,952

Total depreciation expense was $10.7 million and $29.0 million for the three and nine months ended September 30, 2023, respectively. Total depreciation expense was $8.0 million and $22.6 million for the three and nine months ended September 30, 2022, respectively. Construction in progress includes costs associated with internal-use software. Construction in progress is not depreciated until placed in service. Property and equipment includes assets under financing leases and the related amortization of assets under financing leases is included in depreciation expense.

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Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

6. Goodwill and Intangible Assets

Goodwill

The change in the carrying amount of goodwill during the period ended September 30, 2023 includes the following (in thousands):

December 31, 2022	$	47,367
Additions		24,582
Foreign currency fluctuation		(394	)
September 30, 2023	$	71,555

Intangible assets, net

Intangible assets, net consist of the following (in thousands, except as indicated):

	Remaining Avg. Useful lives	Gross		Accumulated			Intangible
September 30, 2023:	(in years)	Amount		Amortization			Assets, net
Developed product technology	6	$	102,211	$	(22,512	)	$	79,699
Trademarks and trade names	7		5,359		(1,370	)		3,989
Customer relationships	3		14,141		(8,150	)		5,991
Distribution network	1		2,413		(2,192	)		221
Total amortized intangible assets			124,124		(34,224	)		89,900
Software in development	n/a		5,659					5,659
In-process research and development	n/a		6,637					6,637
Total intangible assets		$	136,420	$	(34,224	)	$	102,196
		.
	Remaining Avg. Useful lives	Gross		Accumulated			Intangible
December 31, 2022:	(in years)	Amount		Amortization			Assets, net
Developed product technology	7	$	75,896	$	(13,420	)	$	62,476
Trademarks and trade names	8		5,421		(987	)		4,434
Customer relationships	4		14,240		(6,906	)		7,334
Distribution network	2		2,413		(2,041	)		372
Total amortized intangible assets			97,970		(23,354	)		74,616
Software in development	n/a		2,503					2,503
In-process research and development	n/a		5,662					5,662
Total intangible assets		$	106,135	$	(23,354	)	$	82,781

During the nine months ended September 30, 2023, in connection with the Company's acquisition of the Robotic-enabled Navigation Platform, as further described in Note 3, the Company recorded additions to definite-lived intangible assets and goodwill in the amount of $26.9 million and $24.6 million, respectively. The intangible asset acquired will be amortized on a straight-line basis over a useful life of seven years.

Total amortization expense attributed to intangible assets was $4.1 million and $11.1 million for the three and nine months ended September 30, 2023, respectively. Total amortization expense attributed to intangible assets was $2.8 million and $7.2 million for the three and nine months ended September 30, 2022, respectively. Software in development is amortized when the projects are completed and the assets are ready for their intended use. In-process research and development assets begin amortizing when the relevant products reach full commercial launch.

Future amortization expense related to intangible assets is as follows (in thousands):

Remainder of 2023	$	5,691
2024		16,064
2025		14,575
2026		14,575
2027		12,703
Thereafter		26,292
	$	89,900

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Contract Assets and Contract Liabilities

9 Months Ended

Sep. 30, 2023

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]

Contract Assets and Contract Liabilities

7. Contract Assets and Contract Liabilities

Contract assets are included within prepaid expenses and other current assets in the condensed consolidated balance sheets. Contract assets relate to contracts with customers for which one or more performance obligations have been completed and revenue has been recognized, but the customer's payment is contingent on the satisfaction of additional performance obligations. The opening and closing balances of the Company's contract assets are as follows (in thousands):

	September 30, 2023		December 31, 2022
Contract assets	$	1,868	$	—

The Company's current and non-current contract liabilities are $13.8 million and $3.5 million, respectively, as of September 30, 2023. The Company's current and non-current contract liabilities were $12.0 million and $3.0 million, respectively, as of December 31, 2022. The non-current contract liabilities balance is included in other long-term liabilities on the condensed consolidated balance sheets. Contract liabilities relates to contracts with customers for which partial or complete payment of the transaction price has been received from the customer and the related obligations must be completed before revenue can be recognized. These amounts primarily relate to undelivered equipment, services, or maintenance agreements. The Company recognized $5.9 million and $17.0 million of revenue from its contract liabilities during the three and nine months ended September 30, 2023, respectively, of which $2.4 million and $9.3 million was recognized from the opening contract liabilities balance, respectively. The Company recognized $6.4 million and $16.5 million of revenue from its contract liabilities during the three and nine months ended September 30, 2022, respectively, of which $3.4 million and $10.3 million was recognized from the opening contract liabilities balance, respectively. The opening and closing balances of the Company’s contract liabilities are as follows (in thousands):

Balance at December 31, 2022	$	15,003
Payments received		19,367
Revenue recognized		(16,998	)
Foreign currency fluctuation		(67	)
Balance at September 30, 2023	$	17,305

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Debt

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Debt

8. Debt

Term Loan

On January 6, 2023, the Company entered into a $150.0 million term loan credit facility with Braidwell Transaction Holdings, LLC (the “Braidwell Term Loan”). The Braidwell Term Loan provides for an initial term loan of $100.0 million which was funded on the closing date. On September 28, 2023, the Company drew an additional $50.0 million (the “delayed draw term loan(s)” or the “DDTL”). The Braidwell Term Loan matures on January 6, 2028. As of September 30, 2023, the outstanding balance under the Braidwell Term Loan was $150.0 million.

In conjunction with the issuance of the Braidwell Term Loan, the Company incurred $3.4 million in debt issuance costs and $1.5 million in commitment fees. Commitment fees paid to the lender were accounted for as a debt discount. The debt issuance costs and debt discount were recorded as a direct reduction of the carrying amount of the loan on the condensed consolidated balance sheets and are being amortized over the life of the loan. As of September 30, 2023, debt issuance costs and debt discount, net of accumulated amortization, associated with the Braidwell Term Loan were $3.1 million and $1.4 million, respectively.

Borrowings under the Braidwell Term Loan bear interest at a rate per annum equal to the Term Secured Overnight Financing Rate for such SOFR business day ("SOFR") subject to a 3% floor, plus 5.75%. The applicable interest rate as of September 30, 2023 was 11.2%. The loan agreement includes an undrawn commitment fee, which is calculated as 1% per annum of the average daily undrawn portion of the DDTL. Interest and undrawn commitment fees incurred are due quarterly. The Company is also required to pay fees on any prepayment of the Braidwell Term Loan, ranging from 3.0% to 1.0% depending on the date of prepayment, and a final payment fee equal to 3.25% of the principal amount of the loans drawn. The effective interest rate as of September 30, 2023 was 12.2%. During the three months ended September 30, 2023, the Company recognized interest expense on the Braidwell Term Loan of $3.1 million, which includes $0.1 million for the amortization of debt issuance costs and $0.1 million for the debt discount. During the nine months ended September 30, 2023, the Company recognized interest expense on the Braidwell Term Loan of $8.8 million, which includes $0.3 million for the amortization of debt issuance costs and $0.2 million for the debt discount. Upon the Braidwell Term Loan’s maturity, any outstanding principal balance, unpaid accrued interest, and all other obligations under the Braidwell Term Loan will be due and payable.

The Braidwell Term Loan is secured by substantially all of the Company’s assets with the priority interest of the lenders in the Braidwell Term Loan and the Revolving Credit Facility, as defined below, subject to terms of a customary intercreditor agreement, which provides that the lenders under the Revolving Credit Facility have a priority with respect to the Company's accounts receivable, inventory, medical instruments, and items related to the foregoing, and the lenders under the Braidwell Term Loan have priority with respect to the remainder of the Company's assets. The loan agreement contains customary representations and warranties and affirmative and negative covenants. Under the loan agreement, the Company is required to maintain a minimum level of liquidity. The loan agreement also includes certain events of default, and upon the occurrence of such events of default, all outstanding loans under the Braidwell Term Loan may be accelerated and/or the lenders’ commitments terminated. The Company is in compliance with all required financial covenants as of September 30, 2023.

Revolving Credit Facility

In September 2022, the Company entered into a revolving credit facility (the “Revolving Credit Facility”) with entities affiliated with MidCap Financial Trust (“MidCap”). The Revolving Credit Facility provides up to $50.0 million in borrowing capacity to the Company based on a borrowing base. The borrowing base is calculated based on certain accounts receivable and inventory assets. The Company may request a $25.0 million increase in the Revolving Credit Facility for a total commitment of up to $75.0 million. The Revolving Credit Facility matures on the earlier of September 29, 2027, or 90 days prior to the final maturity date of the Company’s 2026 Notes. As of September 30, 2023, the outstanding balance under the Revolving Credit Facility was $46.0 million.

In conjunction with obtaining the Revolving Credit Facility, the Company incurred $1.4 million in debt issuance costs. These costs were capitalized to other assets on the condensed consolidated balance sheets and are being amortized over the life of the Revolving Credit Facility. As of September 30, 2023, debt issuance costs, net of accumulated amortization, associated with the Revolving Credit Facility were $1.1 million.

The outstanding loans under the Revolving Credit Facility bear interest at the sum of Term SOFR plus 3.5% per annum. The applicable interest rate as of September 30, 2023 was 8.9%. The loan agreements include an unused line fee, which is calculated as 0.5% per annum of either the unused Revolving Credit Facility or a minimum balance. Interest and unused line fees incurred are due and capitalized to the outstanding principal balance monthly. The Company recognized interest expense on the Revolving Credit Facility of $0.6 million and $1.5 million, which includes approximately $0.1 million and $0.2 million for the amortization of debt issuance costs, during the three and nine months ended September 30, 2023, respectively. Upon the Revolving Credit Facility’s maturity, any outstanding principal balance, unpaid accrued interest, and all other obligations under the Revolving Credit Facility will be due and payable.

The Revolving Credit Facility contains a lockbox arrangement clause requiring the Company to maintain a lockbox bank account. If the revolving loan availability is less than 30% of the revolving loan limit for five consecutive business days, or the Company is in default, MidCap will apply funds collected from the Company's lockbox account to reduce the outstanding balance of the Revolving Credit Facility. As of September 30, 2023, the Company's loan availability level has not activated lockbox deductions, nor is it expected to for the next 12 months; therefore, the Company has determined that the outstanding balance under the Revolving Credit Facility is long-term debt on the condensed consolidated balance sheets.

The Revolving Credit Facility is secured by substantially all of the Company’s assets with the priority interest of the lenders subject to terms of a customary intercreditor agreement in connection with the Braidwell Term Loan, as described above. The loan agreements and other ancillary documents contain customary representations and warranties and affirmative and negative covenants. Under the loan agreements, the Company is required to maintain a minimum level of liquidity. The loan agreements also include certain events of default, and upon the occurrence of such events of default, all outstanding loans under the Revolving Credit Facility may be accelerated and/or the lenders’ commitments terminated. The Company is in compliance with all required financial covenants as of September 30, 2023.

0.75% Convertible Senior Notes due 2026

In August 2021, the Company issued $316.3 million aggregate principal amount of unsecured 2026 Notes with a stated interest rate of 0.75% and a maturity date of August 1, 2026. Interest on the 2026 Notes is payable semi-annually in arrears on February 1 and August 1 of each year, beginning on February 1, 2022. The net proceeds from the sale of the 2026 Notes were approximately $306.2 million after deducting the initial purchasers’ offering expenses and before cash used for the privately negotiated capped call transactions (the “Capped Call Transactions”), as described below, the repurchase of stock, and the repayment of the outstanding term loan with Squadron Medical Finance Solutions, LLC, and outstanding obligations under an inventory financing agreement. The 2026 Notes do not contain any financial covenants.

The 2026 Notes are convertible into shares of the Company’s common stock based upon an initial conversion rate of 54.5316 shares of the Company’s common stock per $1,000 principal amount of 2026 Notes (equivalent to an initial conversion price of approximately $18.34 per share). The conversion rate will be subject to adjustment upon the occurrence of certain specified events, including certain distributions and dividends to all or substantially all of the holders of the Company’s common stock. Based on the terms of the 2026 Notes, when a conversion notice is received, the Company has the option to pay or deliver cash, shares of the Company’s common stock, or a combination thereof.

Holders of the 2026 Notes have the right to convert their notes in certain circumstances and during specified periods. Prior to the close of business on the business day immediately preceding February 2, 2026, holders may convert all or a portion of their 2026 Notes only under the following circumstances: (1) during any calendar quarter (and only during such calendar quarter) if the last reported sale price of the Company’s 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 calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the 5 consecutive business days immediately after any 10 consecutive trading day period (the “measurement period”) in which the trading price per $1,000 principal amount of 2026 Notes for each trading day of the measurement period 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 trading day; or (3) upon the occurrence of specified corporate events. From and after February 2, 2026, holders of the 2026 Notes may convert their notes at any time at their election until the close of business on the second scheduled trading day immediately before the maturity date. As of September 30, 2023, none of the conditions permitting the holders of the 2026 Notes to convert have been met. The 2026 Notes are classified as long-term debt on the condensed consolidated balances sheet as of September 30, 2023.

The 2026 Notes are redeemable, in whole or in part, at the Company’s option at any time, and from time to time, on or after August 6, 2024 and on or before the 40th scheduled trading day immediately before the maturity date, at a cash redemption price equal to the principal amount of the 2026 Notes to be redeemed, plus accrued and unpaid interest, if any, but only if the last reported sale price per share of the Company’s common stock exceeds 130% of the conversion price for a specified period of time. In addition, calling any of the 2026 Notes for redemption will constitute a “make-whole fundamental change” with respect to the redeemable note, in which case the conversion rate applicable to the conversion of the redeemed note will be increased in certain circumstances if such note is converted after it is called for redemption.

If a fundamental change occurs prior to the maturity date, holders may require the Company to repurchase all or a portion of their 2026 Notes for cash at a price equal to 100% of the principal amount of the 2026 Notes plus accrued and unpaid interest. No principal payments are otherwise due on the 2026 Notes prior to maturity.

The Company recorded the full principal amount of the 2026 Notes as a long-term liability net of deferred issuance costs. The annual effective interest rate for the 2026 Notes is 1.4%. The Company recognized interest expense on the 2026 Notes of $1.1 million and $3.3 million, which includes $0.5 million and $1.5 million for the amortization of debt issuance costs, during the three and nine months ended September 30, 2023, respectively. The Company recognized interest expense on the 2026 Notes of $1.1 million and $3.3 million, which includes $0.5 million and $1.5 million for the amortization of debt issuance costs, during the three and nine months ended September 30, 2022, respectively. The Company uses the if-converted method for assumed conversion of the 2026 Notes to compute the weighted-average shares of common stock outstanding for diluted earnings per share, if applicable.

The outstanding principal amount and carrying value of the 2026 Notes consists of the following (in thousands):

	September 30, 2023			December 31, 2022
Principal	$	316,250		$	316,250
Unamortized debt issuance costs		(5,799	)		(7,290	)
Net carrying value	$	310,451		$	308,960

Capped Call Transactions

In connection with the offering of the 2026 Notes, the Company entered into the Capped Call Transactions with certain financial institutions. The Capped Call Transactions are expected generally to reduce the potential dilution and/or offset the cash payments the Company is required to make in excess of the principal amount of the 2026 Notes upon conversion of the 2026 Notes in the event that the market price per share of the Company’s common stock is greater than the strike price of the Capped Call Transactions with such reduction and/or offset subject to a cap. The Capped Call Transactions have an initial cap price of $27.68 per share of the Company’s common stock, which represents a premium of 100% over the last reported sale price of the Company’s common stock on August 5, 2021, and is subject to certain adjustments under the terms of the Capped Call Transactions. Collectively, the Capped Call Transactions cover, initially, the number of shares of the Company’s common stock underlying the 2026 Notes, subject to anti-dilution adjustments substantially similar to those applicable to the 2026 Notes. The cost of the Capped Call Transactions was approximately $39.9 million.

The Capped Call Transactions are separate transactions and are not part of the terms of the 2026 Notes and will not affect any holder’s rights under the notes. Holders of the 2026 Notes will not have any rights with respect to the Capped Call Transactions.

OCEANE Convertible Bonds

On May 31, 2018, EOS issued 4,344,651 OCEANEs denominated in Euros, due May 2023 for aggregate gross proceeds of $34.3 million (€29.5 million). The OCEANEs were unsecured obligations of EOS, ranked equally with all other unsecured and unsubordinated obligations of EOS, and paid interest at a rate equal to 6% per year, payable semiannually in arrears on May 31 and November 30 of each year, beginning November 30, 2018. The OCEANEs matured on May 31, 2023. The outstanding OCEANEs and accrued interest were paid in full on May 31, 2023. As of September 30, 2023, no OCEANEs remained outstanding. Interest expense was $0.3 million for the nine months ended September 30, 2023. Interest expense was $0.2 million and $0.6 million for the three and nine months ended September 30, 2022, respectively.

Other Debt Agreements

In January and April 2021, prior to the acquisition, EOS obtained two loan agreements, denominated in Euros, under French government sponsored COVID-19 relief initiatives (pret garanti par l’etat or “PGE” loans). Each PGE loan contains a 12-month term and 90% of the principal balance of each loan is state guaranteed. The cost of the state guaranty is 0.25% of the loan amounts. The loans carry an interest-free rate from the commercial banks (€3.3 million) and a 1.75% interest rate from the lender (€1.5 million). The loan capital and loan guaranty costs are payable in full at the end of the 12-month term or the loan may be extended up to 5 additional years. If the Company chooses to extend the debt, the election must be made by the Company between months 8 and 11 of the 12-month term. The extension will carry an interest rate at the banks’ refinancing cost, to be applied from year 2 to year 6 and an increased state guaranty cost (50 to 200 bps, as per a scale with company size and extension year).

In February 2022, the Company extended the maturity for each loan agreement to 2027. Each loan has a 12-month period from the applicable extension date where interest only payments will occur (the “Interest Only Period”). Following the Interest Only Period, monthly and quarterly installments of principal and interest under each loan agreement will be due until the original principal amounts and applicable interest is fully repaid in 2027. The outstanding obligation under each loan as of September 30, 2023 was $3.2 million and $1.4 million (€3.0 million and €1.4 million) at weighted average interest rates of 0.98% and 1.25%, respectively, and weighted average costs of the state guaranty of 0.69% and 1.00%, respectively.

Total Indebtedness

Principal payments remaining on the Company's debt are as follows as of September 30, 2023 (in thousands):

Remainder of 2023	$	676
2024		1,466
2025		1,678
2026		317,748
2027		46,629
Thereafter		154,875
Total		523,072
Less: unamortized debt discount and debt issuance costs		(14,693	)
Total		508,379
Less: current portion of long-term debt		(1,766	)
Long-term debt	$	506,613

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

9. Commitments and Contingencies

Leases

The Company determines if an arrangement is a lease at inception by assessing whether there is an identified asset and whether the contract conveys the right to control the use of the identified asset in exchange for consideration over a period of time. If both criteria are met, the Company records the associated lease liability and corresponding right-of-use asset (“ROU asset”) upon commencement of the lease using a discount rate based on the incremental borrowing rate of interest that the Company would borrow on a collateralized basis for an amount equal to the lease payments in a similar economic environment. Any short-term leases defined as twelve months or less or month-to-month leases are excluded and are expensed each month. Total costs associated with these short-term leases are immaterial to all periods presented.

The Company leases office and storage facilities and equipment under various operating and financing lease agreements. The initial terms of these leases range from 1 to 10 years and generally provide for periodic rent increases. The Company’s lease agreements do not contain any material variable lease payments, residual value guarantees or material restrictive covenants. The Company aggregates all lease and non-lease components for each class of underlying assets into a single lease component and variable charges for common area maintenance and other variable costs are recognized as expense as incurred. Total variable costs associated with leases for the three and nine months ended September 30, 2023 were immaterial. The Company had an immaterial amount of financing leases as of September 30, 2023, which is included in property and equipment, net, accrued expenses and other current liabilities, and other long-term liabilities, on the condensed consolidated balance sheets.

The Company occupies 121,541 square feet of office space as its headquarters in Carlsbad, California. On December 4, 2019, the Company entered into a 10-year operating lease that commenced on February 1, 2021 and will terminate on January 31, 2031, subject to two sixty-month options to renew which are not reasonably certain to be exercised. Base rent under the building lease increases annually by 3% throughout the remainder of the lease. On May 11, 2022, the Company entered into a lease amendment for the buildout of additional space within the building which resulted in a lease modification increasing the ROU asset and lease liability.

Future minimum annual lease payments for all operating leases of the Company are as follows as of September 30, 2023 (in thousands):

Remainder of 2023	$	1,348
2024		5,455
2025		5,209
2026		5,152
2027		5,144
Thereafter		13,080
Total undiscounted lease payments		35,388
Less: imputed interest		(5,802	)
Operating lease liabilities		29,586
Less: current portion of operating lease liabilities		(5,090	)
Operating lease liabilities, less current portion	$	24,496

The Company’s weighted average remaining lease term and weighted average discount rate as of September 30, 2023 and December 31, 2022 are as follows:

	September 30, 2023			December 31, 2022
Weighted-average remaining lease term (years)		6.8			7.7
Weighted-average discount rate		5.5	%		5.5	%

Information related to the Company’s operating leases is as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Rent expense	$	1,597	$	1,210	$	4,156	$	3,457
Cash paid for amounts included in measurement of lease liabilities	$	1,317	$	1,032	$	3,767	$	3,183

Purchase Commitments

The Company is obligated to meet certain minimum purchase commitment requirements with a third-party supplier through December 2026. As of September 30, 2023, the remaining minimum purchase commitment required by the Company under the agreement is $14.3 million.

Litigation

The Company is and may become involved in various legal proceedings arising from its business activities. While management is not aware of any litigation matter that in and of itself would have a material adverse impact on the Company’s condensed consolidated results of operations, cash flows or financial position, litigation is inherently unpredictable, and depending on the nature and timing of a proceeding, an unfavorable resolution could materially affect the Company’s future consolidated results of operations, cash flows or financial position in a particular period. The Company assesses contingencies to determine the degree of probability and range of possible loss for potential accrual or disclosure in the Company’s condensed consolidated financial statements. An estimated loss contingency is accrued in the Company’s condensed consolidated financial statements if it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Because litigation is inherently unpredictable and unfavorable resolutions could occur, assessing contingencies is highly subjective and requires judgments about future events. When evaluating contingencies, the Company may be unable to provide a meaningful estimate due to a number of factors, including the procedural status of the matter in question, the presence of complex or novel legal theories, and/or the ongoing discovery and development of information important to the matters. In addition, damage amounts claimed in litigation against the Company may be unsupported, exaggerated or unrelated to reasonably possible outcomes, and as such are not meaningful indicators of the Company’s potential liability.

Indemnifications

In the normal course of business, the Company enters into agreements under which it occasionally indemnifies third-parties for intellectual property infringement claims or claims arising from breaches of representations or warranties. In addition, from time to time, the Company provides indemnity protection to third-parties for claims relating to past performance arising from undisclosed liabilities, product liabilities, environmental obligations, representations and warranties, and other claims. In these agreements, the scope and amount of remedy, or the period in which claims can be made, may be limited. It is not possible to determine the maximum potential amount of future payments, if any, due under these indemnities due to the conditional nature of the obligations and the unique facts and circumstances involved in each agreement.

In October 2017, NuVasive filed a lawsuit in Delaware Chancery Court against Mr. Miles, the Company’s Chairman and CEO, who was a former officer and board member of NuVasive. The Company itself was not initially a named defendant in this lawsuit; however, in June 2018, NuVasive amended its complaint to add the Company as a defendant. In October 2018, the Delaware Court ordered that NuVasive advance legal fees for Mr. Miles’ defense in the lawsuit, as well as Mr. Miles’ legal fees incurred in pursuing advancement of his fees, pursuant to an indemnification agreement between NuVasive and Mr. Miles. As of September 30, 2023, the Company has not recorded any liability on the condensed consolidated balance sheet related to this matter.

Royalties

The Company has entered into various intellectual property agreements requiring the payment of royalties based on the sale of products that utilize such intellectual property. These royalties primarily relate to products sold by Alphatec Spine and are based on fixed fees or calculated either as a percentage of net sales or on a per-unit sold basis. Royalties are included on the accompanying condensed consolidated statements of operations as a component of cost of sales.

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Stock-Benefit Plans and Equity Transactions

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Stock-Benefit Plans and Equity Transactions

10. Stock-Benefit Plans and Equity Transactions

Stock-Based Compensation

The Company has stock-based compensation plans under which it grants stock options, restricted stock units ("RSUs"), and performance restricted stock units ("PRSUs") to officers, directors and third parties. Total stock-based compensation for the periods presented are as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Cost of sales	$	2,369	$	735	$	24,601	$	1,440
Research and development		6,790		1,653		9,587		3,987
Sales, general and administrative		10,914		8,689		26,541		25,037
Total	$	20,073	$	11,077	$	60,729	$	30,464

As of September 30, 2023, there was $70.5 million of unrecognized compensation expense for RSUs and PRSUs to be recognized over a weighted average period of 1.69 years.

The Company has entered into Development Service Agreements for the development of a wide variety of potential products and intellectual property. Under these agreements, future royalty payments for product and/or intellectual property rights may be paid in either cash or restricted shares of the Company’s common stock at the election of the developer, depending on the terms of the agreement. Certain of these agreements were amended to remove the cash royalty option and require settlement in restricted shares of the Company’s common stock. During the three and nine months ended September 30, 2023, the vesting conditions of certain of these awards were deemed probable. Stock-based compensation associated with these awards is included in cost of sales and research and development on the condensed consolidated statements of operations.

Restricted Stock Units and Performance Based Restricted Stock Units Awards

The Company issued approximately 789,000 and 5,714,000 shares of common stock, before net share settlement, upon vesting of RSUs and PRSUs during the three and nine months ended September 30, 2023, respectively. The Company issued approximately 563,000 and 3,103,000 shares of common stock, before net share settlement, upon vesting of RSUs and PRSUs during the three and nine months ended September 30, 2022, respectively.

Employee Stock Purchase Plan

Employees are eligible to participate in the Employee Stock Purchase Plan ("ESPP") approved by its shareholders. During the three months ended September 30, 2023, there were no shares issued under the ESPP. During the nine months ended September 30, 2023, there were approximately 247,000 shares issued under the ESPP. During the three months ended September 30, 2022, there were no shares issued under the ESPP. During the nine months ended September 30, 2022, there were approximately 222,000 shares issued under the ESPP.

The Company estimates the fair value of shares issued to employees under the ESPP using the Black-Scholes option-pricing model. The assumptions used to estimate the fair value of stock options granted and stock purchase rights under the ESPP are as follows:

	Three and Nine Months Ended
	September 30,
	2023		2022
Risk-free interest rate	4.54% - 5.41%		0.07% - 1.54%
Expected dividend yield		—		—
Expected term (years)	0.41 - 0.60			0.50
Volatility	40.87% - 62.77%		50.29% - 64.53%

At the Market Offering

On August 11, 2023, the Company completed an at the market offering of 668,484 shares of the Company’s common stock, $0.0001 par value per share, pursuant to the sales agreement between the Company and Cowen and Company, LLC. The net proceeds from the offering were approximately $9.9 million, including the underwriting discounts and commissions and offering expenses paid by the Company.

Registered Securities Offering

On April 19, 2023, the Company completed a registered securities offering (the “Offering”) of 4,285,715 shares of the Company’s common stock, $0.0001 par value per share, pursuant to the Underwriting Agreement between the Company and Cowen and Company, LLC, at a price of $14.00 per share. The net proceeds from the Offering were approximately $57.5 million, including the underwriting discounts and commissions and offering expenses paid by the Company.

Warrants Outstanding

2018 PIPE Warrants

The 2018 common stock warrants (the “2018 PIPE Warrants”) had a five-year life and were exercisable by cash or cashless exercise. The 2018 PIPE Warrants expired in May 2023, and no 2018 PIPE warrants remained outstanding as of September 30, 2023. During the nine months ended September 30, 2023, there were approximately 6,311,000 2018 PIPE Warrant exercises for total cash proceeds of $0.4 million. During the three months ended September 30, 2022, there were approximately 14,000 2018 PIPE Warrant cashless exercises. During the nine months ended September 30, 2022, there were approximately 140,000 2018 PIPE Warrant exercises for total cash proceeds of $0.4 million.

SafeOp Surgical Merger Warrants

The SafeOp common stock warrants (the “SafeOp Warrants”), had a five-year life and were exercisable by cash or cashless exercise. The SafeOp Warrants expired in May 2023, and no SafeOp warrants remained outstanding as of September 30, 2023. During the nine months ended September 30, 2023, there were 937,000 cashless SafeOp Warrant exercises. During the three months ended September 30, 2022, there were no SafeOp Warrant exercises. During the nine months ended September 30, 2022, there were approximately 257,000 SafeOp Warrant cashless exercises.

Squadron Medical Warrants

In connection with debt financing entered into with Squadron Medical in 2018, and amended in 2019 and 2020, the Company issued common stock warrants to Squadron Medical and a participant lender (the “Squadron Medical Warrants”). The Squadron Medical Warrants expire in May 2027 and are exercisable by cash exercise. No Squadron Medical Warrants have been exercised as of September 30, 2023.

Executive Warrants

The Company issued warrants to Mr. Patrick S. Miles, the Company’s Chairman and Chief Executive Officer (the “Executive Warrants”). The Executive Warrants had a five-year term and are exercisable by cash or cashless exercise. In October 2022, the term was extended to seven years. No Executive Warrants have been exercised as of September 30, 2023.

A summary of all outstanding warrants for common stock as of September 30, 2023, are as follows (in thousands, except for strike price data):

	Number of Warrants		Strike Price		Expiration
2018 Squadron Medical Warrants		845	$	3.15	May 2027
2019 Squadron Medical Warrants		4,839	$	2.17	May 2027
2020 Squadron Medical Warrants		1,076	$	4.88	May 2027
Executive Warrants		1,327	$	5.00	December 2024
Other(1)		139	$	7.41	Various through February 2026
Total		8,226

(1)Weighted-average strike price.

All outstanding warrants were deemed to qualify for equity classification under authoritative accounting guidance.

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Business Segment and Geographic Information

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Business Segment and Geographic Information

11. Business Segment and Geographic Information

The Company operates in one segment based upon the Company’s organizational structure, the way in which the operations and investments are managed and evaluated by the chief operating decision maker (“CODM”) as well as the lack of available discrete financial information at a level lower than the consolidated level. The Company shares common, centralized support functions which report directly to the CODM and decision-making regarding the Company’s overall operating performance and allocation of Company resources is assessed on a consolidated basis.

Net revenue and property and equipment, net, by geographic region are as follows (in thousands):

	Revenue								Property and equipment, net
	Three Months Ended September 30,				Nine Months Ended September 30,				September 30,		December 31,
(in thousands)	2023		2022		2023		2022		2023		2022
United States	$	110,096	$	84,801	$	317,728	$	229,720	$	132,371	$	99,050
International		8,166		5,038		26,564		15,203		1,414		2,902
Total	$	118,262	$	89,839	$	344,292	$	244,923	$	133,785	$	101,952

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Net Loss Per Share

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Net Loss Per Share

12. Net Loss Per Share

Basic net loss per share is calculated by dividing the net loss available to common stockholders by the weighted-average number of common shares outstanding for the period. If applicable, diluted net loss per share attributable to common stockholders is calculated by dividing net loss available to common stockholders by the diluted weighted-average number of common shares outstanding for the period, determined using the treasury-stock method and the if-converted method for convertible debt. For purposes of this calculation, common stock subject to repurchase by the Company, common stock issuable upon conversion or exercise of convertible notes, preferred shares, options, and warrants are considered to be common stock equivalents and are only included in the calculation of diluted earnings per share when their effect is dilutive. Due to the Company’s net loss position, the effect of including common stock equivalents in the earnings per share calculation is anti-dilutive, and therefore not included.

The following table presents the computation of basic and diluted net loss per share (in thousands, except per share amounts):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2023			2022			2023			2022
Numerator:
Net loss	$	(42,654	)	$	(36,793	)	$	(137,560	)	$	(116,510	)
Denominator:
Weighted average common shares outstanding		122,468			104,804			117,026			102,561
Net loss per share, basic and diluted:	$	(0.35	)	$	(0.35	)	$	(1.18	)	$	(1.14	)

The following potentially dilutive shares of common stock were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented (in thousands):

	As of September 30,
	2023		2022
Options to purchase common stock and employee stock purchase plan		2,567		3,142
Unvested restricted stock unit awards		7,606		8,744
Warrants to purchase common stock		8,226		17,486
Senior convertible notes		17,246		17,246
Total		35,645		46,618

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Income Taxes

9 Months Ended

Sep. 30, 2023

Income Tax Disclosure [Abstract]

Income Taxes

13. Income Taxes

To calculate its interim tax provision, at the end of each interim period the Company estimates the annual effective tax rate, adjusted for discrete items arising in that quarter. The computation of the annual estimated effective tax rate at each interim period requires certain estimates and significant judgment including, but not limited to, the estimated annual taxable income or loss for the year and projections of the proportion of income earned and taxed in foreign jurisdictions. The accounting estimates used to compute the provision for income taxes may change as new events occur, additional information is obtained, or the tax environment changes.

The Company’s effective tax rate from operations was a benefit of 0.27% and 0.11% for the three and nine months ended September 30, 2023, respectively. The Company’s effective tax rate from operations was a benefit of 0.21% and 0.16% for the three and nine months ended September 30, 2022, respectively. The Company’s effective tax rate differs from the federal statutory rate of 21% in each period primarily due to the Company’s net loss position and valuation allowance.

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Related Party Transactions

9 Months Ended

Sep. 30, 2023

Related Party Transactions [Abstract]

Related Party Transactions

14. Related Party Transactions

The Company purchases inventory from an affiliate of Squadron Capital, LLC (the “Squadron Supplier Affiliate”). David Pelizzon, President and Director of Squadron Capital, LLC, currently serves on the Company’s Board of Directors. For the three and nine months ended September 30, 2023, the Company purchased inventory in the amounts of $5.8 million and $14.1 million, respectively, from the Squadron Supplier Affiliate. For the three and nine months ended September 30, 2022, the Company purchased inventory in the amounts of $2.7 million and $7.7 million, respectively, from the Squadron Supplier Affiliate. As of September 30, 2023, and December 31, 2022, the Company had $4.5 million and $2.4 million, respectively, due to the Squadron Supplier Affiliate, for inventory purchases.

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Subsequent Events

9 Months Ended

Sep. 30, 2023

Subsequent Events [Abstract]

Subsequent Events

15. Subsequent Events

On October 27, 2023, the Company completed an underwritten public offering (the “Public Offering”) of 14,300,000 shares of the Company’s common stock, $0.0001 par value per share, at a price of $10.50 per share. The gross proceeds from the Public Offering, before deducting the underwriting discounts and commissions and other estimated offering expenses payable by the Company, were approximately $150.1 million. In connection with the Public Offering, the Company has granted the underwriters a 30-day option to purchase an additional 2,145,000 shares of common stock in the offering at the public offering price, less underwriting discounts and commissions. The Company expects to use the net proceeds from the Public Offering to fund general corporate purposes, including working capital, capital expenditures, acquisitions, or research and development.

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Organization and Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

The Company

The Company

Alphatec Holdings, Inc. (the “Company”), through its wholly owned subsidiaries, Alphatec Spine, Inc. (“Alphatec Spine”), SafeOp Surgical, Inc. (“SafeOp”), and EOS imaging S.A.S. (“EOS”), is a medical technology company that designs, develops, and markets technology for the treatment of spinal disorders associated with disease and degeneration, congenital deformities, and trauma. The Company markets its products in the United States of America and internationally via a network of independent sales agents and direct sales representatives.

Basis of Presentation and Principles of Consolidation

Basis of Presentation and Principles of Consolidation

The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. The Company translates the financial statements of its foreign subsidiaries using end-of-period exchange rates for assets and liabilities and average exchange rates during each reporting period for results of operations. All intercompany balances and transactions have been eliminated during consolidation.

The accompanying condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Pursuant to these rules and regulations, the Company has condensed or omitted certain information and footnotes it normally includes in its annual consolidated financial statements prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). The unaudited interim condensed consolidated financial statements reflect all adjustments, including normal recurring adjustments which, in the opinion of management, are necessary for a fair statement of the financial position and results of operations for the periods presented. These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2022, which are included in the Company’s Annual Report on Form 10-K that was filed with the SEC. Operating results for the nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023, or any other future periods.

Prior-period Adjustment

Prior-period Adjustment

Subsequent to the issuance of the Company’s consolidated financial statements as of and for the year ended December 31, 2022, the Company identified that a deferred tax liability and additional goodwill related to the acquisition of EOS should have been recorded at the time of the acquisition. The Company corrected the errors in the accompanying condensed consolidated financial statements as of the earliest period presented and has concluded that the correction of these errors is not material to the previously issued financial statements.

The correction to the accompanying unaudited condensed consolidated balance sheets, condensed consolidated statements of operations, condensed consolidated statements of comprehensive loss, condensed consolidated statements of stockholders' equity, and condensed consolidated statements of cash flows are as follows (in thousands):

	At December 31, 2021
Condensed Consolidated Statements of Stockholders' Equity	As Reported			Adjustment			As Corrected
Accumulated other comprehensive loss	$	(5,994	)		(42	)	$	(6,036	)
Accumulated deficit	$	(782,325	)		1,294		$	(781,031	)
Total stockholders' equity	$	79,422			1,252		$	80,674
	At December 31, 2022
Condensed Consolidated Balance Sheets	As Reported			Adjustment			As Corrected
Goodwill	$	39,775			7,592		$	47,367
Total assets	$	513,376			7,592		$	520,968
Other long-term liabilities	$	11,543			5,546		$	17,089
Accumulated other comprehensive loss	$	(10,690	)		(104	)	$	(10,794	)
Accumulated deficit	$	(934,474	)		2,150		$	(932,324	)
Total stockholders' deficit	$	(36,713	)		2,046		$	(34,667	)
Total liabilities and stockholders' deficit	$	513,376			7,592		$	520,968

										Three Months Ended September 30, 2022									Nine Months Ended September 30, 2022
Condensed Consolidated Statements of Operations										As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected
Income tax provision (benefit)										$	129			(206	)	$	(77	)	$	461			(653	)	$	(192	)
Net loss										$	(36,999	)		206		$	(36,793	)	$	(117,163	)		653		$	(116,510	)
										Three Months Ended September 30, 2022									Nine Months Ended September 30, 2022
Condensed Consolidated Statements of Comprehensive Loss										As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected
Net loss										$	(36,999	)		206		$	(36,793	)	$	(117,163	)		653		$	(116,510	)
Foreign currency translation adjustments										$	(4,851	)		(107	)	$	(4,958	)	$	(11,320	)		(230	)	$	(11,550	)
Comprehensive loss										$	(41,850	)		99		$	(41,751	)	$	(128,483	)		423		$	(128,060	)
	Three Months Ended March 31, 2022									Three Months Ended June 30, 2022									Three Months Ended September 30, 2022
Condensed Consolidated Statements of Stockholders' Equity (Deficit)	As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected
Foreign currency translation adjustments	$	(1,180	)		(24	)	$	(1,204	)	$	(5,289	)		(99	)	$	(5,388	)	$	(4,851	)		(107	)	$	(4,958	)
Net loss	$	(42,844	)		228		$	(42,616	)	$	(37,320	)		219		$	(37,101	)	$	(36,999	)		206		$	(36,793	)
Accumulated other comprehensive loss	$	(7,174	)		(66	)	$	(7,240	)	$	(12,463	)		(165	)	$	(12,628	)	$	(17,314	)		(272	)	$	(17,586	)
Accumulated deficit	$	(825,169	)		1,522		$	(823,647	)	$	(862,489	)		1,741		$	(860,748	)	$	(899,488	)		1,947		$	(897,541	)
Total stockholders' equity (deficit)	$	41,984			1,456		$	43,440		$	10,539			1,576		$	12,115		$	(22,569	)		1,675		$	(20,894	)

	Nine Months Ended September 30, 2022
Condensed Consolidated Statements of Cash Flows	As Reported			Adjustment			As Corrected
Net loss	$	(117,163	)		653		$	(116,510	)
Other long-term liabilities	$	(50	)		(644	)	$	(694	)
Net cash used for operating activities	$	(66,740	)		9		$	(66,731	)
Effect of exchange rate changes on cash	$	(1,166	)		(9	)	$	(1,175	)

Reclassification

Reclassification

Certain financial statement line items in the condensed consolidated financial statements for the nine months ended September 30, 2022 have been aggregated to conform to the current year’s presentation.

Use of Estimates

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts of revenues and expenses. Actual results could differ from those estimates. Significant items subject to such estimates and assumptions include the useful lives of property and equipment, goodwill, intangible assets, allowances for doubtful accounts, deferred tax assets, inventory, stock-based compensation, revenues, income tax uncertainties, and other contingencies.

Fair Value Measurements

Fair Value Measurements

The carrying amount of financial instruments consisting of cash and cash equivalents, accounts receivable, prepaid expenses and other current assets, accounts payable, accrued expenses, and short-term debt included in the Company’s condensed consolidated financial statements are reasonable estimates of fair value due to their short maturities.

Authoritative guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

Level 1: Quoted prices in active markets for identical assets or liabilities.

Level 2: Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active; or other inputs that can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Excess and Obsolete Inventory

Excess and Obsolete Inventory

Most of the Company’s inventory is comprised of finished goods, which is primarily produced by third-party suppliers. Specialized implants, fixation products, biologics, and disposables are determined by utilizing a standard cost method that includes capitalized variances which approximates the weighted average cost. Imaging equipment and related parts are valued at weighted average cost. Inventories are stated at the lower of cost or net realizable value. The Company reviews the components of its inventory on a periodic basis for excess and obsolescence and adjusts inventory to its net realizable value as necessary.

The Company records a lower of cost or net realizable value (“LCNRV”) inventory reserve for estimated excess and obsolete inventory based upon its expected use of inventory on hand. The Company’s inventory, which consists primarily of specialized implants, fixation products, biologics, and disposables is at risk of obsolescence due to the need to maintain substantial levels of inventory. In order to market its products effectively and meet the demands of interoperative product placement, the Company maintains and provides surgeons and hospitals with a variety of inventory products and sizes. For each surgery, fewer than all components will be consumed. The need to maintain and provide a wide variety of inventory causes inventory to be held that is not likely to be used.

The Company’s estimates and assumptions for excess and obsolete inventory are reviewed and updated on a quarterly basis. The estimates and assumptions are determined primarily based on current usage of inventory and the age of inventory quantities on hand. Additionally, the Company considers recent sales experience to develop assumptions about future demand for its products, while considering product life cycles and new product launches. Increases in the LCNRV reserve for excess and obsolete inventory result in a corresponding charge to cost of sales.

Revenue Recognition

Revenue Recognition

The Company recognizes revenue from product sales in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Revenue from Contracts with Customers (“Topic 606”). This standard applies to all contracts with customers, except for contracts that are within the scope of other standards, such as leases, insurance, collaboration arrangements, and financial instruments. Under Topic 606, an entity recognizes revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration that the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of Topic 606, the entity performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer.

Sales are derived primarily from the sale of spinal implant products, imaging equipment, and related services to hospitals and medical centers through direct sales representatives and independent sales agents. Revenue is recognized when obligations under the terms of a contract with customers are satisfied, which occurs with the transfer of control of products to customers, either upon shipment of the product or delivery of the product to the customer depending on the shipping terms, or when the products are used in a surgical procedure (implanted in a patient). Revenue from the sale of imaging equipment is recognized as each distinct performance obligation is fulfilled and control transfers to the customer, beginning with shipment or delivery, depending on the terms. Revenue from other distinct performance obligations, such as maintenance on imaging equipment and other imaging-related services, is recognized in the period the service is performed, and makes up less than 10% of the Company’s total revenue. Revenue is measured based on the amount of consideration expected to be received in exchange for the transfer of the goods or services specified in the contract with each customer. In certain cases, the Company does offer the ability for customers to lease its imaging equipment primarily on a non-sales type basis, but such arrangements are immaterial to total revenue in the periods presented. The Company generally does not allow returns of products that have been delivered. Costs incurred by the Company associated with sales contracts with customers are deferred over the performance obligation period and recognized in the same period as the related revenue, except for contracts that complete within one year or less, in which case the associated costs are expensed as incurred. Payment terms for sales to customers may vary but are commensurate with the general business practices in the country of sale.

To the extent that the transaction price includes variable consideration, such as discounts, rebates, and customer payment penalties, the Company estimates the amount of variable consideration that should be included in the transaction price utilizing either the expected value method or the most likely amount method depending on the nature of the variable consideration. Variable consideration is included in the transaction price if, in the Company's judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. Estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of the Company’s anticipated performance and all information that is reasonably available, including historical, current, and forecasted information.

The Company records a contract asset when one or more performance obligations have been completed by the Company and revenue has been recognized, but the customer's payment is contingent on the satisfaction of additional performance obligations. The Company records a contract liability, or deferred revenue, when it has an obligation to provide a product or service to the customer and payment is received in advance of its performance. When the Company sells a product or service with a future performance obligation, revenue is deferred on the unfulfilled performance obligation and recognized over the related performance period. Generally, the Company does not have observable evidence of the standalone selling price related to its future service obligations; therefore, the Company estimates the selling price using an expected cost plus a margin approach. The transaction price is allocated using the relative standalone selling price method. The use of alternative estimates could result in a different amount of revenue deferral.

Recently Adopted and Issued Accounting Pronouncements

Recently Adopted and Issued Accounting Pronouncements

In August 2021, the FASB issued Accounting Standards Update ("ASU") No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. The guidance requires application of Topic 606, Revenue from Contracts with Customers to recognize and measure contract assets and contract liabilities acquired in a business combination. ASU No. 2021-08 adds an exception to the general recognition and measurement principle in Topic 805 where assets acquired and liabilities assumed in a business combination, including contract assets and contract liabilities arising from contracts with customers, are measured at fair value on the acquisition date. Under the new guidance, the acquirer will recognize acquired contract assets and contract liabilities as if the acquirer had originated the contract. The standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022, with early adoption permitted. The Company adopted ASU No. 2021-08 as of January 1, 2023, on a prospective basis. The adoption of ASU No. 2021-08 did not have a material impact on the Company's condensed consolidated financial statements and related disclosures.

In October 2023, the FASB issued ASU No. 2023-06, Disclosure Improvements - Codification Amendments in Response to the SEC’s Disclosure Update and Simplification Initiative. The guidance amends the ASC to incorporate certain disclosure requirements from SEC Release No. 33-10532 Disclosure Update and Simplification issued in 2018. The effective date for each amendment will be the date on which the SEC’s removal of that related disclosure from Regulation S-X or Regulation S-K becomes effective, with early adoption prohibited. ASU No. 2023-06 is not expected to have a material impact on the Company's financial statements.

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Organization and Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Schedule of Prior-period Adjustment

The correction to the accompanying unaudited condensed consolidated balance sheets, condensed consolidated statements of operations, condensed consolidated statements of comprehensive loss, condensed consolidated statements of stockholders' equity, and condensed consolidated statements of cash flows are as follows (in thousands):

	At December 31, 2021
Condensed Consolidated Statements of Stockholders' Equity	As Reported			Adjustment			As Corrected
Accumulated other comprehensive loss	$	(5,994	)		(42	)	$	(6,036	)
Accumulated deficit	$	(782,325	)		1,294		$	(781,031	)
Total stockholders' equity	$	79,422			1,252		$	80,674
	At December 31, 2022
Condensed Consolidated Balance Sheets	As Reported			Adjustment			As Corrected
Goodwill	$	39,775			7,592		$	47,367
Total assets	$	513,376			7,592		$	520,968
Other long-term liabilities	$	11,543			5,546		$	17,089
Accumulated other comprehensive loss	$	(10,690	)		(104	)	$	(10,794	)
Accumulated deficit	$	(934,474	)		2,150		$	(932,324	)
Total stockholders' deficit	$	(36,713	)		2,046		$	(34,667	)
Total liabilities and stockholders' deficit	$	513,376			7,592		$	520,968

										Three Months Ended September 30, 2022									Nine Months Ended September 30, 2022
Condensed Consolidated Statements of Operations										As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected
Income tax provision (benefit)										$	129			(206	)	$	(77	)	$	461			(653	)	$	(192	)
Net loss										$	(36,999	)		206		$	(36,793	)	$	(117,163	)		653		$	(116,510	)
										Three Months Ended September 30, 2022									Nine Months Ended September 30, 2022
Condensed Consolidated Statements of Comprehensive Loss										As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected
Net loss										$	(36,999	)		206		$	(36,793	)	$	(117,163	)		653		$	(116,510	)
Foreign currency translation adjustments										$	(4,851	)		(107	)	$	(4,958	)	$	(11,320	)		(230	)	$	(11,550	)
Comprehensive loss										$	(41,850	)		99		$	(41,751	)	$	(128,483	)		423		$	(128,060	)
	Three Months Ended March 31, 2022									Three Months Ended June 30, 2022									Three Months Ended September 30, 2022
Condensed Consolidated Statements of Stockholders' Equity (Deficit)	As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected			As Reported			Adjustment			As Corrected
Foreign currency translation adjustments	$	(1,180	)		(24	)	$	(1,204	)	$	(5,289	)		(99	)	$	(5,388	)	$	(4,851	)		(107	)	$	(4,958	)
Net loss	$	(42,844	)		228		$	(42,616	)	$	(37,320	)		219		$	(37,101	)	$	(36,999	)		206		$	(36,793	)
Accumulated other comprehensive loss	$	(7,174	)		(66	)	$	(7,240	)	$	(12,463	)		(165	)	$	(12,628	)	$	(17,314	)		(272	)	$	(17,586	)
Accumulated deficit	$	(825,169	)		1,522		$	(823,647	)	$	(862,489	)		1,741		$	(860,748	)	$	(899,488	)		1,947		$	(897,541	)
Total stockholders' equity (deficit)	$	41,984			1,456		$	43,440		$	10,539			1,576		$	12,115		$	(22,569	)		1,675		$	(20,894	)

	Nine Months Ended September 30, 2022
Condensed Consolidated Statements of Cash Flows	As Reported			Adjustment			As Corrected
Net loss	$	(117,163	)		653		$	(116,510	)
Other long-term liabilities	$	(50	)		(644	)	$	(694	)
Net cash used for operating activities	$	(66,740	)		9		$	(66,731	)
Effect of exchange rate changes on cash	$	(1,166	)		(9	)	$	(1,175	)

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis include the following as of September 30, 2023, and December 31, 2022 (in thousands):

	September 30, 2023
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	62,949		—		—	$	62,949
Total cash equivalents	$	62,949		—		—	$	62,949
	December 31, 2022
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	62,956		—		—	$	62,956
Total cash equivalents	$	62,956		—		—	$	62,956

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Inventories (Tables)

9 Months Ended

Sep. 30, 2023

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories reported at the lower of cost or net realizable value consist of the following (in thousands):

	September 30, 2023		December 31, 2022
Raw materials	$	21,449	$	13,928
Work-in-process		4,680		3,032
Finished goods		104,543		84,561
Inventories	$	130,672	$	101,521

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Property and Equipment, net (Tables)

9 Months Ended

Sep. 30, 2023

Property, Plant and Equipment [Abstract]

Property and equipment, net

Property and equipment, net consist of the following (in thousands, except as indicated):

	Useful lives (in years)	September 30, 2023			December 31, 2022
Surgical instruments	4	$	206,748		$	158,906
Machinery and equipment	7		11,421			9,502
Computer equipment	3		5,388			4,753
Office furniture and equipment	5		5,547			4,760
Leasehold improvements	various		3,797			2,965
Construction in progress	n/a		20,280			15,360
			253,181			196,246
Less: accumulated depreciation    and amortization			(119,396	)		(94,294	)
Property and equipment, net		$	133,785		$	101,952

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Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The change in the carrying amount of goodwill during the period ended September 30, 2023 includes the following (in thousands):

December 31, 2022	$	47,367
Additions		24,582
Foreign currency fluctuation		(394	)
September 30, 2023	$	71,555

Intangible Assets, Net

Intangible assets, net consist of the following (in thousands, except as indicated):

	Remaining Avg. Useful lives	Gross		Accumulated			Intangible
September 30, 2023:	(in years)	Amount		Amortization			Assets, net
Developed product technology	6	$	102,211	$	(22,512	)	$	79,699
Trademarks and trade names	7		5,359		(1,370	)		3,989
Customer relationships	3		14,141		(8,150	)		5,991
Distribution network	1		2,413		(2,192	)		221
Total amortized intangible assets			124,124		(34,224	)		89,900
Software in development	n/a		5,659					5,659
In-process research and development	n/a		6,637					6,637
Total intangible assets		$	136,420	$	(34,224	)	$	102,196
		.
	Remaining Avg. Useful lives	Gross		Accumulated			Intangible
December 31, 2022:	(in years)	Amount		Amortization			Assets, net
Developed product technology	7	$	75,896	$	(13,420	)	$	62,476
Trademarks and trade names	8		5,421		(987	)		4,434
Customer relationships	4		14,240		(6,906	)		7,334
Distribution network	2		2,413		(2,041	)		372
Total amortized intangible assets			97,970		(23,354	)		74,616
Software in development	n/a		2,503					2,503
In-process research and development	n/a		5,662					5,662
Total intangible assets		$	106,135	$	(23,354	)	$	82,781

Schedule of Intangible Assets, Future Expected Amortization Expense

Future amortization expense related to intangible assets is as follows (in thousands):

Remainder of 2023	$	5,691
2024		16,064
2025		14,575
2026		14,575
2027		12,703
Thereafter		26,292
	$	89,900

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Contract Assets and Contract Liabilities (Tables)

9 Months Ended

Sep. 30, 2023

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]

Opening and Closing Balances of Company's Contract Assets and Liabilities

The opening and closing balances of the Company's contract assets are as follows (in thousands):

	September 30, 2023		December 31, 2022
Contract assets	$	1,868	$	—

The opening and closing balances of the Company’s contract liabilities are as follows (in thousands):

Balance at December 31, 2022	$	15,003
Payments received		19,367
Revenue recognized		(16,998	)
Foreign currency fluctuation		(67	)
Balance at September 30, 2023	$	17,305

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Debt (Tables)

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Outstanding Principal Amount and Carrying Value of Notes

The outstanding principal amount and carrying value of the 2026 Notes consists of the following (in thousands):

	September 30, 2023			December 31, 2022
Principal	$	316,250		$	316,250
Unamortized debt issuance costs		(5,799	)		(7,290	)
Net carrying value	$	310,451		$	308,960

Principal Payments Remaining on Debt

Principal payments remaining on the Company's debt are as follows as of September 30, 2023 (in thousands):

Remainder of 2023	$	676
2024		1,466
2025		1,678
2026		317,748
2027		46,629
Thereafter		154,875
Total		523,072
Less: unamortized debt discount and debt issuance costs		(14,693	)
Total		508,379
Less: current portion of long-term debt		(1,766	)
Long-term debt	$	506,613

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2023

Commitments and Contingencies Disclosure [Abstract]

Future minimum annual lease payments

Future minimum annual lease payments for all operating leases of the Company are as follows as of September 30, 2023 (in thousands):

Remainder of 2023	$	1,348
2024		5,455
2025		5,209
2026		5,152
2027		5,144
Thereafter		13,080
Total undiscounted lease payments		35,388
Less: imputed interest		(5,802	)
Operating lease liabilities		29,586
Less: current portion of operating lease liabilities		(5,090	)
Operating lease liabilities, less current portion	$	24,496

Summary of Weighted-Average Remaining Lease Term and Discount Rate

The Company’s weighted average remaining lease term and weighted average discount rate as of September 30, 2023 and December 31, 2022 are as follows:

	September 30, 2023			December 31, 2022
Weighted-average remaining lease term (years)		6.8			7.7
Weighted-average discount rate		5.5	%		5.5	%

Summary of Operating Leases

Information related to the Company’s operating leases is as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Rent expense	$	1,597	$	1,210	$	4,156	$	3,457
Cash paid for amounts included in measurement of lease liabilities	$	1,317	$	1,032	$	3,767	$	3,183

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Stock-Benefit Plans and Equity Transactions (Tables)

9 Months Ended

Sep. 30, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Total Stock Based Compensation

The Company has stock-based compensation plans under which it grants stock options, restricted stock units ("RSUs"), and performance restricted stock units ("PRSUs") to officers, directors and third parties. Total stock-based compensation for the periods presented are as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Cost of sales	$	2,369	$	735	$	24,601	$	1,440
Research and development		6,790		1,653		9,587		3,987
Sales, general and administrative		10,914		8,689		26,541		25,037
Total	$	20,073	$	11,077	$	60,729	$	30,464

Schedule of Assumptions used to Estimate Fair Value of Stock Options Granted and Stock Purchase Rights under ESPP

The Company estimates the fair value of shares issued to employees under the ESPP using the Black-Scholes option-pricing model. The assumptions used to estimate the fair value of stock options granted and stock purchase rights under the ESPP are as follows:

	Three and Nine Months Ended
	September 30,
	2023		2022
Risk-free interest rate	4.54% - 5.41%		0.07% - 1.54%
Expected dividend yield		—		—
Expected term (years)	0.41 - 0.60			0.50
Volatility	40.87% - 62.77%		50.29% - 64.53%

Summary of All Outstanding Warrants for Common Stock

A summary of all outstanding warrants for common stock as of September 30, 2023, are as follows (in thousands, except for strike price data):

	Number of Warrants		Strike Price		Expiration
2018 Squadron Medical Warrants		845	$	3.15	May 2027
2019 Squadron Medical Warrants		4,839	$	2.17	May 2027
2020 Squadron Medical Warrants		1,076	$	4.88	May 2027
Executive Warrants		1,327	$	5.00	December 2024
Other(1)		139	$	7.41	Various through February 2026
Total		8,226

(1)Weighted-average strike price.

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Business Segment and Geographic Information (Tables)

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Schedule of Net Revenue and Property, and Equipment, Net, by Geographic Region

Net revenue and property and equipment, net, by geographic region are as follows (in thousands):

	Revenue								Property and equipment, net
	Three Months Ended September 30,				Nine Months Ended September 30,				September 30,		December 31,
(in thousands)	2023		2022		2023		2022		2023		2022
United States	$	110,096	$	84,801	$	317,728	$	229,720	$	132,371	$	99,050
International		8,166		5,038		26,564		15,203		1,414		2,902
Total	$	118,262	$	89,839	$	344,292	$	244,923	$	133,785	$	101,952

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Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Loss Per Share

The following table presents the computation of basic and diluted net loss per share (in thousands, except per share amounts):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2023			2022			2023			2022
Numerator:
Net loss	$	(42,654	)	$	(36,793	)	$	(137,560	)	$	(116,510	)
Denominator:
Weighted average common shares outstanding		122,468			104,804			117,026			102,561
Net loss per share, basic and diluted:	$	(0.35	)	$	(0.35	)	$	(1.18	)	$	(1.14	)

Anti-Dilutive Securities of Common Stock Excluded from Calculation of Diluted Net Loss Per Share

The following potentially dilutive shares of common stock were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented (in thousands):

	As of September 30,
	2023		2022
Options to purchase common stock and employee stock purchase plan		2,567		3,142
Unvested restricted stock unit awards		7,606		8,744
Warrants to purchase common stock		8,226		17,486
Senior convertible notes		17,246		17,246
Total		35,645		46,618

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Organization and Significant Accounting Policies - Additional Information (Details)	9 Months Ended
	Sep. 30, 2023
Maximum
Significant Accounting Policies [Line Items]
Percentage of revenue from other distinct performance obligations of total revenue	10.00%

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Organization and Significant Accounting Policies - Schedule of Prior-period Adjustment - Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill	$ 71,555			$ 47,367
Total Assets	670,221			520,968
Other long-term liabilities	11,626			17,089
Accumulated other comprehensive loss	(12,111)			(10,794)	$ (17,586)	$ (12,628)	$ (7,240)	$ (6,036)
Accumulated deficit	(1,069,884)			(932,324)	(897,541)	(860,748)	(823,647)	(781,031)
Total stockholder's deficit	(44,161)	$ (28,153)	$ (58,362)	(34,667)	(20,894)	12,115	43,440	80,674
Total liabilities and stockholders' deficit	$ 670,221			520,968
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill				39,775
Total Assets				513,376
Other long-term liabilities				11,543
Accumulated other comprehensive loss				(10,690)	(17,314)	(12,463)	(7,174)	(5,994)
Accumulated deficit				(934,474)	(899,488)	(862,489)	(825,169)	(782,325)
Total stockholder's deficit				(36,713)	(22,569)	10,539	41,984	79,422
Total liabilities and stockholders' deficit				513,376
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill				7,592
Total Assets				7,592
Other long-term liabilities				5,546
Accumulated other comprehensive loss				(104)	(272)	(165)	(66)	(42)
Accumulated deficit				2,150	1,947	1,741	1,522	1,294
Total stockholder's deficit				2,046	$ 1,675	$ 1,576	$ 1,456	$ 1,252
Total liabilities and stockholders' deficit				$ 7,592

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Organization and Significant Accounting Policies - Schedule of Prior-period Adjustment - Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax provision (benefit)	$ (117)			$ (77)			$ (153)	$ (192)
Net loss	$ (42,654)	$ (51,377)	$ (43,529)	(36,793)	$ (37,101)	$ (42,616)	$ (137,560)	(116,510)
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax provision (benefit)				129				461
Net loss				(36,999)	(37,320)	(42,844)		(117,163)
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax provision (benefit)				(206)				(653)
Net loss				$ 206	$ 219	$ 228		$ 653

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Organization and Significant Accounting Policies - Schedule of Prior-period Adjustment - Condensed Consolidated Statements of Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	$ (42,654)	$ (51,377)	$ (43,529)	$ (36,793)	$ (37,101)	$ (42,616)	$ (137,560)	$ (116,510)
Foreign currency translation adjustments	(2,600)	$ 178	$ 1,105	(4,958)	(5,388)	(1,204)	(1,317)	(11,550)
Comprehensive loss	$ (45,254)			(41,751)			$ (138,877)	(128,060)
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss				(36,999)	(37,320)	(42,844)		(117,163)
Foreign currency translation adjustments				(4,851)	(5,289)	(1,180)		(11,320)
Comprehensive loss				(41,850)				(128,483)
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss				206	219	228		653
Foreign currency translation adjustments				(107)	$ (99)	$ (24)		(230)
Comprehensive loss				$ 99				$ 423

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Organization and Significant Accounting Policies - Schedule of Prior-period Adjustment - Condensed Consolidated Statements of Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Foreign currency translation adjustments	$ (2,600)	$ 178	$ 1,105	$ (4,958)	$ (5,388)	$ (1,204)	$ (1,317)	$ (11,550)
Net loss	(42,654)	(51,377)	(43,529)	(36,793)	(37,101)	(42,616)	(137,560)	(116,510)
Accumulated other comprehensive loss	(12,111)			(17,586)	(12,628)	(7,240)	(12,111)	(17,586)	$ (10,794)	$ (6,036)
Accumulated deficit	(1,069,884)			(897,541)	(860,748)	(823,647)	(1,069,884)	(897,541)	(932,324)	(781,031)
Total stockholders' equity (deficit)	$ (44,161)	$ (28,153)	$ (58,362)	(20,894)	12,115	43,440	$ (44,161)	(20,894)	(34,667)	80,674
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Foreign currency translation adjustments				(4,851)	(5,289)	(1,180)		(11,320)
Net loss				(36,999)	(37,320)	(42,844)		(117,163)
Accumulated other comprehensive loss				(17,314)	(12,463)	(7,174)		(17,314)	(10,690)	(5,994)
Accumulated deficit				(899,488)	(862,489)	(825,169)		(899,488)	(934,474)	(782,325)
Total stockholders' equity (deficit)				(22,569)	10,539	41,984		(22,569)	(36,713)	79,422
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Foreign currency translation adjustments				(107)	(99)	(24)		(230)
Net loss				206	219	228		653
Accumulated other comprehensive loss				(272)	(165)	(66)		(272)	(104)	(42)
Accumulated deficit				1,947	1,741	1,522		1,947	2,150	1,294
Total stockholders' equity (deficit)				$ 1,675	$ 1,576	$ 1,456		$ 1,675	$ 2,046	$ 1,252

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Organization and Significant Accounting Policies - Schedule of Prior-period Adjustment - Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	$ (42,654)	$ (51,377)	$ (43,529)	$ (36,793)	$ (37,101)	$ (42,616)	$ (137,560)	$ (116,510)
Other long-term liabilities							(4,995)	(694)
Net cash used for operating activities							(53,481)	(66,731)
Effect of exchange rate changes on cash							$ (275)	(1,175)
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss				(36,999)	(37,320)	(42,844)		(117,163)
Other long-term liabilities								(50)
Net cash used for operating activities								(66,740)
Effect of exchange rate changes on cash								(1,166)
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss				$ 206	$ 219	$ 228		653
Other long-term liabilities								(644)
Net cash used for operating activities								9
Effect of exchange rate changes on cash								$ (9)

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value on a recurring basis	$ 62,949	$ 62,956
Money Market Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value on a recurring basis	62,949	62,956
Fair Value, Inputs, Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value on a recurring basis	62,949	62,956
Fair Value, Inputs, Level 1 | Money Market Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value on a recurring basis	$ 62,949	$ 62,956

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Fair Value Measurements - Additional Information (Details) - Fair Value, Inputs, Level 1 - 2026 Notes - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value of long-term debt	$ 304.6	$ 288.8
Debt maturity year	2026

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Business Combination - Additional Information (Details) - USD ($) $ in Thousands		9 Months Ended
	Apr. 19, 2023	Sep. 30, 2023
Business Acquisition [Line Items]
Purchase price in cash		$ 55,000
Navigation-enabled Robotics Platform | Asset Purchase Agreement
Business Acquisition [Line Items]
Purchase price in cash	$ 55,000

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Inventories - Schedule of Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Inventory Disclosure [Abstract]
Raw materials	$ 21,449	$ 13,928
Work-in-process	4,680	3,032
Finished goods	104,543	84,561
Inventories	$ 130,672	$ 101,521

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Property and Equipment, net - Property and Equipment, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 253,181	$ 196,246
Less: accumulated depreciation and amortization	(119,396)	(94,294)
Property and equipment, net	$ 133,785	101,952
Surgical instruments
Property Plant And Equipment [Line Items]
Useful life (in years)	4 years
Property and equipment, gross	$ 206,748	158,906
Machinery and equipment
Property Plant And Equipment [Line Items]
Useful life (in years)	7 years
Property and equipment, gross	$ 11,421	9,502
Computer equipment
Property Plant And Equipment [Line Items]
Useful life (in years)	3 years
Property and equipment, gross	$ 5,388	4,753
Office furniture and equipment
Property Plant And Equipment [Line Items]
Useful life (in years)	5 years
Property and equipment, gross	$ 5,547	4,760
Leasehold improvements
Property Plant And Equipment [Line Items]
Useful lives	various
Property and equipment, gross	$ 3,797	2,965
Construction in progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 20,280	$ 15,360

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Property and Equipment, net - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Abstract]
Depreciation	$ 10.7	$ 8.0	$ 29.0	$ 22.6

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Goodwill and Intangible Assets - Schedule of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
December 31, 2022	$ 47,367
Additions	24,582
Foreign currency fluctuation	(394)
September 30, 2023	$ 71,555

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Goodwill and Intangible Assets - Intangible Assets, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Intangible Assets [Line Items]
Total amortized intangible assets, Gross Amount	$ 124,124	$ 97,970
Total amortized intangible assets, Accumulated Amortization	(34,224)	(23,354)
Total amortized intangible assets, net	89,900	74,616
Total Intangible assets, Gross Amount	136,420	106,135
Total intangible assets, net	$ 102,196	$ 82,781
Developed product technology
Intangible Assets [Line Items]
Intangible assets acquired amortized on a straight-line basis over useful lives	6 years	7 years
Total amortized intangible assets, Gross Amount	$ 102,211	$ 75,896
Total amortized intangible assets, Accumulated Amortization	(22,512)	(13,420)
Total amortized intangible assets, net	$ 79,699	$ 62,476
Trademarks and trade names
Intangible Assets [Line Items]
Intangible assets acquired amortized on a straight-line basis over useful lives	7 years	8 years
Total amortized intangible assets, Gross Amount	$ 5,359	$ 5,421
Total amortized intangible assets, Accumulated Amortization	(1,370)	(987)
Total amortized intangible assets, net	$ 3,989	$ 4,434
Customer Relationships
Intangible Assets [Line Items]
Intangible assets acquired amortized on a straight-line basis over useful lives	3 years	4 years
Total amortized intangible assets, Gross Amount	$ 14,141	$ 14,240
Total amortized intangible assets, Accumulated Amortization	(8,150)	(6,906)
Total amortized intangible assets, net	$ 5,991	$ 7,334
Distribution network
Intangible Assets [Line Items]
Intangible assets acquired amortized on a straight-line basis over useful lives	1 year	2 years
Total amortized intangible assets, Gross Amount	$ 2,413	$ 2,413
Total amortized intangible assets, Accumulated Amortization	(2,192)	(2,041)
Total amortized intangible assets, net	221	372
Software in development
Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets, Gross Amount	5,659	2,503
Indefinite-Lived Intangible Assets, net	5,659	2,503
In process research and development
Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets, Gross Amount	6,637	5,662
Indefinite-Lived Intangible Assets, net	$ 6,637	$ 5,662

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Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Additions to definite-lived intangible assets			$ 26,900
Additions to goodwill			$ 24,582
Additions to definite-lived intangible assets, useful life			7 years
Amortization of intangible assets	$ 4,100	$ 2,800	$ 11,100	$ 7,200

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Goodwill and Intangible Assets - Schedule of Intangible Assets, Future Expected Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2023	$ 5,691
2024	16,064
2025	14,575
2026	14,575
2027	12,703
Thereafter	26,292
Total amortized intangible assets, net	$ 89,900	$ 74,616

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Contract Assets and Contract Liabilities - Opening and Closing Balances of Company's Contract Assets (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Contract assets	$ 1,868

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Contract Assets and Contract Liabilities - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Contract liabilities	$ 13,833		$ 13,833		$ 11,956
Contract liabilities, non-current	3,500		3,500		$ 3,000
Revenue from contract liabilities	2,400	$ 3,400	9,300	$ 10,300
Revenue recognized from contract liabilities	$ 5,900	$ 6,400	$ 16,998	$ 16,500

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Contract Assets and Contract Liabilities - Opening and Closing Balances of Company's Contract Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Balance at December 31, 2022			$ 15,003
Payments received			19,367
Revenue recognized	$ (5,900)	$ (6,400)	(16,998)	$ (16,500)
Foreign currency fluctuation			67
Balance at September 30, 2023	$ 17,305		$ 17,305

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Debt - Term Loan (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Jan. 06, 2023	Sep. 30, 2023	Sep. 30, 2023	Sep. 28, 2023
Debt Instrument [Line Items]
Initial term loan facility		$ 508,379	$ 508,379
Braidwell Term Loan | Braidwell Transaction Holdings, LLC
Debt Instrument [Line Items]
Long term debt	$ 150,000
Initial term loan facility	$ 100,000
Debt instrument drew				$ 50,000
Credit facility outstanding balance		$ 150,000	$ 150,000
Effective interest rate		12.20%	12.20%
Debt instrument, maturity date	Jan. 06, 2028
Interest rate		11.20%	11.20%
Interest expenses		$ 3,100	$ 8,800
Amortization of debt issuance costs		100	300
Amortization of debt discount		100	200
Debt discount		1,400	1,400
Debt issuance costs incurred	$ 3,400	$ 3,100	$ 3,100
Commitment fees incurred	$ 1,500
Undrawn commitment fee	1.00%
Final payment fee percentage	3.25%
Interest rate terms	Borrowings under the Braidwell Term Loan bear interest at a rate per annum equal to the Term Secured Overnight Financing Rate for such SOFR business day ("SOFR") subject to a 3% floor, plus 5.75%.
Braidwell Term Loan | Braidwell Transaction Holdings, LLC | Minimum
Debt Instrument [Line Items]
Fee amount percentage	3.00%
Braidwell Term Loan | Braidwell Transaction Holdings, LLC | Maximum
Debt Instrument [Line Items]
Fee amount percentage	1.00%
Braidwell Term Loan | Braidwell Transaction Holdings, LLC | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate per annum	5.75%
Braidwell Term Loan | Braidwell Transaction Holdings, LLC | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate per annum	3.00%

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Debt - Revolving Credit Facility (Details) - Revolving Credit Facility - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2023	Dec. 31, 2022
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 50,000,000
Increase in borrowing capacity	25,000,000
Maximum commitment amount	$ 75,000,000
Credit facility matures date	Sep. 29, 2027
Credit facility, matures period prior to final maturity date of 2026 notes	90 days
Interest expenses		$ 600,000	$ 1,500,000
Amortization of debt issuance costs		100,000	200,000
Credit facility outstanding balance		46,000,000	46,000,000
Debt issuance costs incurred				$ 1,400,000
Debt issuance costs, net of accumulated amortization		$ 1,100,000	$ 1,100,000
Interest rate		8.90%	8.90%
Unused line fee percentage per annum				0.50%
Lockbox arrangement, percentage of revolving loan limit maximum availability				30.00%
Lockbox arrangement, revolving loan limit number of consecutive business day				5 days
Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Interest rate per annum				3.50%

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Debt - 0.75% Senior Convertible Notes due 2026 (Details) - 0.75% Senior Convertible Notes due 2026	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2021 USD ($) $ / shares shares	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) Days	Sep. 30, 2022 USD ($)
Line Of Credit Facility [Line Items]
Aggregate principal amount of debt	$ 316,300,000
Interest rate	0.75%
Debt instrument, maturity date	Aug. 01, 2026
Debt instrument, frequency of periodic payment	semi-annually
Debt instrument, Date of first payment	Feb. 01, 2022
Net proceeds	$ 306,200,000
Payment terms				Interest on the 2026 Notes is payable semi-annually in arrears on February 1 and August 1 of each year, beginning on February 1, 2022.
Debt instrument covenant description				The 2026 Notes do not contain any financial covenants.
Initial conversion rate | shares	54.5316
Debt instrument converted principal amount	$ 1,000
Conversion price per share | $ / shares	$ 18.34
Consecutive trading days | Days				30
Threshold percentage of par value trigger	130.00%			98.00%
Number of conversion price, consecutive business days | Days				5
Number of conversion price, consecutive trading days | Days				10
Debt instrument converted principal amount				$ 1,000,000
Debt conversion start date				Feb. 02, 2026
Convertible notes redemption start date	Aug. 06, 2024
Convertible notes, redemption price percentage	100.00%
Principal payments due	$ 0
Effective interest rate		1.40%		1.40%
Interest expenses		$ 1,100,000	$ 1,100,000	$ 3,300,000	$ 3,300,000
Amortization of debt issuance costs		$ 500,000	$ 500,000	$ 1,500,000	$ 1,500,000
Minimum [Member]
Line Of Credit Facility [Line Items]
Threshold trading days | Days				20
Maximum
Line Of Credit Facility [Line Items]
Threshold percentage of par value trigger				130.00%

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Debt - Outstanding Principal Amount and Carrying Value of Notes (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Principal	$ 523,072
Net carrying value	508,379
2026 Notes
Debt Instrument [Line Items]
Principal	316,250	$ 316,250
Unamortized debt issuance costs	(5,799)	(7,290)
Net carrying value	$ 310,451	$ 308,960

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Debt - Capped Call Transactions (Details) - 0.75% Senior Convertible Notes due 2026 - Capped Call Transactions $ in Millions	Aug. 05, 2021 USD ($) $ / shares
Debt Instrument [Line Items]
Initial cap price | $ / shares	27.68
Percentage of premium over last reported sale price of common stock	100.00%
Cost of capped call transactions | $	$ 39.9

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Debt - OCEANE Convertible Bonds (Details) € in Millions			3 Months Ended	9 Months Ended
	May 31, 2018 USD ($) ConvertibleBond	May 31, 2018 EUR (€) ConvertibleBond	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Debt Instrument [Line Items]
OCEANEs remained outstanding				$ 508,379,000
OCEANE Convertible Bonds | EOS Imaging S.A.
Debt Instrument [Line Items]
Number of OCEANE convertible bonds issued | ConvertibleBond	4,344,651	4,344,651
Aggregate gross proceeds	$ 34,300,000	€ 29.5
Interest rate	6.00%	6.00%
Payment terms				The OCEANEs were unsecured obligations of EOS, ranked equally with all other unsecured and unsubordinated obligations of EOS, and paid interest at a rate equal to 6% per year, payable semiannually in arrears on May 31 and November 30 of each year, beginning November 30, 2018
Debt instrument, frequency of periodic payment	semiannually	semiannually
Debt instrument, Date of first payment	Nov. 30, 2018	Nov. 30, 2018
Debt instrument, maturity date	May 31, 2023	May 31, 2023
Interest expense			$ 200,000	$ 300,000	$ 600,000
OCEANEs remained outstanding				$ 0

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Debt - Other Debt Agreements (Details) - EOS Imaging S.A. $ in Millions	1 Months Ended	4 Months Ended	9 Months Ended
	Feb. 28, 2022	Apr. 30, 2021 EUR (€) Agreement	Sep. 30, 2023 EUR (€)	Sep. 30, 2023 USD ($)
Line Of Credit Facility [Line Items]
Number of loan agreements | Agreement		2
Debt instrument term	12 months	12 months
Percentage of principal state guaranteed		90.00%
Percentage of cost of state guaranty		0.25%
Debt instrument interest-free rate amount		€ 3,300,000
Effective interest rate		1.75%
Debt instrument interest rate amount		€ 1,500,000
Line of credit facility description			The loan capital and loan guaranty costs are payable in full at the end of the 12-month term or the loan may be extended up to 5 additional years. If the Company chooses to extend the debt, the election must be made by the Company between months 8 and 11 of the 12-month term.
Line of credit facility extension description			The extension will carry an interest rate at the banks’ refinancing cost, to be applied from year 2 to year 6 and an increased state guaranty cost (50 to 200 bps, as per a scale with company size and extension year).
Debt instrument, extended maturity year	2027
Loan One
Line Of Credit Facility [Line Items]
Outstanding loan obligation			€ 3,000,000.0	$ 3.2
Weighted average interest rate on loan			0.98%	0.98%
Percentage of weighted average cost of state guaranty			0.69%
Loan Two
Line Of Credit Facility [Line Items]
Outstanding loan obligation			€ 1,400,000	$ 1.4
Weighted average interest rate on loan			1.25%	1.25%
Percentage of weighted average cost of state guaranty			1.00%
Maximum
Line Of Credit Facility [Line Items]
Debt instrument loan extended additional period		5 years

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Debt - Principal Payments Remaining on Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Disclosure [Abstract]
Remainder of 2023	$ 676
2024	1,466
2025	1,678
2026	317,748
2027	46,629
Thereafter	154,875
Total	523,072
Less: unamortized debt discount and debt issuance costs	(14,693)
Net carrying value	508,379
Less: current portion of long-term debt	(1,766)
Long-term debt	$ 506,613	$ 349,511

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Commitments and Contingencies - Additional Information (Details) $ in Millions		9 Months Ended
	Dec. 04, 2019 ft²	Sep. 30, 2023 USD ($)
Loss Contingencies [Line Items]
Lessee operating lease, description		Any short-term leases defined as twelve months or less or month-to-month leases are excluded and are expensed each month. Total costs associated with these short-term leases are immaterial to all periods presented.
Remaining minimum purchase commitment required | $		$ 14.3
Building Lease
Loss Contingencies [Line Items]
Operating lease term	10 years
Area for facility of office, engineering and research and development space | ft²	121,541
Lease agreement commencement date	Feb. 01, 2021
Lease agreement expiry date	Jan. 31, 2031
Lease renewal term	260 months
Annual increase in base rent	3.00%
Minimum
Loss Contingencies [Line Items]
Operating lease term		1 year
Maximum
Loss Contingencies [Line Items]
Operating lease term		10 years

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Commitments and Contingencies - Future Minimum Annual Lease Payments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Remainder of 2023	$ 1,348
2024	5,455
2025	5,209
2026	5,152
2027	5,144
Thereafter	13,080
Total undiscounted lease payments	35,388
Less: imputed interest	(5,802)
Operating lease liabilities	29,586
Less: current portion of operating lease liabilities	(5,090)	$ (4,842)
Operating lease liabilities, less current portion	$ 24,496	$ 26,562

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Commitments and Contingencies - Summary of Weighted-Average Remaining Lease Term and Discount Rate (Details)	Sep. 30, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Weighted-average remaining lease term (years)	6 years 9 months 18 days	7 years 8 months 12 days
Weighted-average discount rate	5.50%	5.50%

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Commitments and Contingencies - Summary of Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 1,597	$ 1,210	$ 4,156	$ 3,457
Cash paid for amounts included in measurement of lease liabilities	$ 1,317	$ 1,032	$ 3,767	$ 3,183

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Stock-Benefit Plans and Equity Transactions - Summary of Total Stock Based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	$ 20,073	$ 11,077	$ 60,729	$ 30,464
Cost of Sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	2,369	735	24,601	1,440
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	6,790	1,653	9,587	3,987
Sales, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	$ 10,914	$ 8,689	$ 26,541	$ 25,037

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Stock-Benefit Plans and Equity Transactions - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		9 Months Ended
	Aug. 11, 2023	Apr. 19, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants outstanding			8,226,000		8,226,000
Common stock, par value			$ 0.0001		$ 0.0001		$ 0.0001
Proceeds from common stock offering					$ 67,428
At the Market Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued in transaction	668,484
Common stock, par value	$ 0.0001
Proceeds from common stock offering	$ 9,900
Registered Securities Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, par value		$ 0.0001
Proceeds from common stock offering		$ 57,500
Registered Securities Offering | Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued in transaction		4,285,715
Shares offering price per share		$ 14.00
Mr. Miles
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant expiration period					5 years
Warrant extended term					7 years
Number of warrants exercised					0
Safe Op Surgical Inc
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant expiration period					5 years
Number of warrants exercised				0	937,000	257,000
Warrants outstanding			0		0
2018 Common Stock Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant expiration period					5 years
Proceeds from exercise of warrant					$ 400	$ 400
Number of warrants exercised				14,000,000	6,311,000,000	140,000,000
Warrants outstanding			0		0
Squadron Medical | Participant Lender
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of warrants exercised					0
RSU's and PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized compensation expense			$ 70,500		$ 70,500
Unamortized compensation expense to be recognized over weighted average period					1 year 8 months 8 days
Shares of common stock issued before net settlement			789,000	563,000	5,714,000	3,103,000
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under ESPP			0	0	247,000,000	222,000,000

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Stock-Benefit Plans and Equity Transactions - Schedule of Assumptions used to Estimate Fair Value of Stock Options Granted and Stock Purchase Rights under ESPP (Details) - ESPP	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate, minimum	4.54%	0.07%	4.54%	0.07%
Risk-free interest rate, maximum	5.41%	1.54%	5.41%	1.54%
Expected term (years)		6 months		6 months
Volatility, minimum	40.87%	50.29%	40.87%	50.29%
Volatility, maximum	62.77%	64.53%	62.77%	64.53%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	4 months 28 days		4 months 28 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	7 months 6 days		7 months 6 days

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Stock-Benefit Plans and Equity Transactions - Summary of All Outstanding Warrants for Common Stock (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Class Of Warrant Or Right [Line Items]
Number of Warrants	8,226
2018 Squadron Medical Warrants
Class Of Warrant Or Right [Line Items]
Number of Warrants	845
Strike Price | $ / shares	$ 3.15
Expiration	May 2027
2019 Squadron Medical Warrants
Class Of Warrant Or Right [Line Items]
Number of Warrants	4,839
Strike Price | $ / shares	$ 2.17
Expiration	May 2027
2020 Squadron Medical Warrants
Class Of Warrant Or Right [Line Items]
Number of Warrants	1,076
Strike Price | $ / shares	$ 4.88
Expiration	May 2027
Executive Warrants
Class Of Warrant Or Right [Line Items]
Number of Warrants	1,327
Strike Price | $ / shares	$ 5
Expiration	December 2024
Other Warrants
Class Of Warrant Or Right [Line Items]
Number of Warrants	139	[1]
Strike Price | $ / shares	$ 7.41	[1]
Expiration	Various through February 2026	[1]

[1] Weighted-average strike price.

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Business Segment and Geographic Information - Additional Information (Details)	9 Months Ended
	Sep. 30, 2023 Segment
Segment Reporting [Abstract]
Number of operating segments	1

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Business Segment and Geographic Information - Schedule of Net Revenue and Property, and Equipment, Net, by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	$ 118,262	$ 89,839	$ 344,292	$ 244,923
Property and equipment, net	133,785		133,785		$ 101,952
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	110,096	84,801	317,728	229,720
Property and equipment, net	132,371		132,371		99,050
International
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue	8,166	$ 5,038	26,564	$ 15,203
Property and equipment, net	$ 1,414		$ 1,414		$ 2,902

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Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net loss	$ (42,654)	$ (36,793)	$ (137,560)	$ (116,510)
Denominator:
Weighted average shares outstanding, basic	122,468	104,804	117,026	102,561
Weighted average shares outstanding, diluted	122,468	104,804	117,026	102,561
Net loss per share, basic:	$ (0.35)	$ (0.35)	$ (1.18)	$ (1.14)
Net loss per share, diluted:	$ (0.35)	$ (0.35)	$ (1.18)	$ (1.14)

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Net Loss Per Share - Anti-Dilutive Securities of Common Stock Excluded from Calculation of Diluted Net Loss Per Share (Details) - shares shares in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities not included in diluted net loss per share (in shares)	35,645	46,618
Options to purchase common stock and employee stock purchase plan
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities not included in diluted net loss per share (in shares)	2,567	3,142
Unvested restricted stock unit awards
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities not included in diluted net loss per share (in shares)	7,606	8,744
Warrants to purchase common stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities not included in diluted net loss per share (in shares)	8,226	17,486
Senior Convertible Notes
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities not included in diluted net loss per share (in shares)	17,246	17,246

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Income Taxes - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Effective income tax rate from operations	0.27%	0.21%	0.11%	0.16%
Federal statutory income tax rate			21.00%	21.00%

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Related Party Transactions - Additional Information (Details) - Squadron Supplier Affiliate - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Related Party Transaction [Line Items]
Purchased inventory from related party	$ 5.8	$ 2.7	$ 14.1	$ 7.7
Due to Affiliate	$ 4.5		$ 4.5		$ 2.4

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Subsequent Events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Oct. 27, 2023	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2023	Dec. 31, 2022
Subsequent Event [Line Items]
Common stock, par value		$ 0.0001		$ 0.0001	$ 0.0001
Proceeds from common stock offering				$ 67,428
Common Stock
Subsequent Event [Line Items]
Common stock shares issued		668,000	4,286,000
Subsequent Event | Underwritten Public Offering
Subsequent Event [Line Items]
Common stock, par value	$ 0.0001
Additional common stock shares granted to purchase, optional	2,145,000
Additional common stock shares purchase period	30 days
Subsequent Event | Underwritten Public Offering | Common Stock
Subsequent Event [Line Items]
Common stock shares issued	14,300,000
Shares offering price per share	$ 10.5
Subsequent Event | Public Offering
Subsequent Event [Line Items]
Proceeds from common stock offering	$ 150,100