Surgalign (SRGAQ) 10-Q 5 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 26, 2019
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	RTIX
Entity Registrant Name	RTI Surgical Holdings, Inc.
Entity Central Index Key	0001760173
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		73,897,965
Entity File Number	001-38832
Entity Tax Identification Number	832540607
Entity Address, Address Line One	520 Lake Cook Road
Entity Address, Address Line Two	Suite 315
Entity Address, City or Town	Deerfield
Entity Address, State or Province	Illinois
Entity Address, Postal Zip Code	60015
City Area Code	877
Local Phone Number	343-6832
Entity Information, Former Legal or Registered Name	RTI Surgical, Inc.
Former Address [Member]
Entity Information [Line Items]
Entity Address, Address Line One	11621 Research Circle
Entity Address, City or Town	Alachua
Entity Address, State or Province	Florida
Entity Address, Postal Zip Code	32615

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 4,518	$ 10,949
Accounts receivable - less allowances of $3,103 at June 30, 2019 and $2,380 at December 31, 2018	56,163	48,351
Inventories - net	127,906	107,471
Prepaid and other current assets	8,733	8,791
Total current assets	197,320	175,562
Non-current inventories - net	20,445
Property, plant and equipment - net	79,691	77,954
Deferred tax assets - net	19,715	17,510
Goodwill	271,429	59,798
Other intangible assets - net	25,269	26,359
Other assets - net	7,542	4,003
Total assets	621,411	361,186
Current Liabilities:
Accounts payable	20,766	26,309
Accrued expenses	24,668	24,683
Current portion of deferred revenue	4,744	4,908
Total current liabilities	50,178	55,900
Long-term obligations	165,081	49,073
Acquisition contingencies	98,372	4,986
Other long-term liabilities	2,562	633
Deferred revenue	325	744
Total liabilities	316,518	111,336
Commitments and contingencies (Note 22)
Preferred stock Series A, $.001 par value: 5,000,000 shares authorized; 50,000 shares issued and outstanding	66,318	66,226
Stockholders' equity:
Common stock, $.001 par value: 150,000,000 shares authorized; 75,159,262 and 63,469,185 shares issued and outstanding, respectively	75	64
Additional paid-in capital	496,596	433,143
Accumulated other comprehensive loss	(7,268)	(7,270)
Accumulated deficit	(245,787)	(237,444)
Less treasury stock, 1,257,949 and 1,221,180 shares, respectively, at cost	(5,041)	(4,869)
Total stockholders' equity	238,575	183,624
Total liabilities and stockholders' equity	$ 621,411	$ 361,186

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Accounts receivable, allowances	$ 3,103	$ 2,380
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	50,000	50,000
Preferred stock, shares outstanding	50,000	50,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	75,159,262	63,469,185
Common stock, shares outstanding	75,159,262	63,469,185
Treasury stock, shares	1,257,949	1,221,180

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Gain (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenues	$ 82,307	$ 70,685	$ 152,048	$ 140,575
Costs of processing and distribution	37,562	40,645	69,299	76,853
Gross profit	44,745	30,040	82,749	63,722
Expenses:
Marketing, general and administrative	38,993	29,266	70,876	57,655
Research and development	3,868	3,270	8,204	6,691
Severance and restructuring costs				884
Gain on acquisition contingency	(1,590)		(1,590)
Asset impairment and abandonments		4,515	15	4,644
Acquisition and integration expenses	1,953		10,910	800
Total operating expenses	43,224	37,051	88,415	70,674
Operating income (loss)	1,521	(7,011)	(5,666)	(6,952)
Other (expense) income:
Interest expense	(3,635)	(777)	(5,239)	(1,612)
Interest income	26	6	157	17
Loss on extinguishment of debt		(309)		(309)
Foreign exchange loss	(19)	(71)	(50)	(22)
Total other expense - net	(3,628)	(1,151)	(5,132)	(1,926)
Income (loss) before income tax benefit	(2,107)	(8,162)	(10,798)	(8,878)
Income tax benefit	2,851	2,702	2,455	2,453
Net income (loss)	744	(5,460)	(8,343)	(6,425)
Convertible preferred dividend		(981)		(1,947)
Net income (loss) applicable to common shares	744	(6,441)	(8,343)	(8,372)
Other comprehensive gain (loss):
Unrealized foreign currency translation gain (loss)	395	(914)	2	(521)
Comprehensive gain (loss)	$ 1,139	$ (7,355)	$ (8,341)	$ (8,893)
Net income (loss) per common share - basic	$ 0.01	$ (0.10)	$ (0.12)	$ (0.13)
Net income (loss) per common share - diluted	$ 0.01	$ (0.10)	$ (0.12)	$ (0.13)
Weighted average shares outstanding - basic	75,144,488	63,405,708	70,409,839	63,400,737
Weighted average shares outstanding - diluted	91,120,956	63,405,708	70,409,839	63,400,737

Condensed Consolidated Statem_2

Condensed Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Series A Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]Series A Preferred Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 31, 2017	$ 181,737		$ 63	$ 429,459		$ (6,329)	$ (237,066)	$ (4,390)
Accumulated effect of adoption of the revenue recognition standard	872						872
Net (loss) income	(965)						(965)
Foreign currency translation adjustment	393					393
Exercise of common stock options	287			287
Stock-based compensation	1,280			1,280
Purchase of treasury stock	(363)							(363)
Amortization of preferred stock series A issuance costs		$ (46)			$ (46)
Preferred stock Series A dividend		(966)			(966)
Ending Balance at Mar. 31, 2018	182,229		63	430,014		(5,936)	(237,159)	(4,753)
Beginning Balance at Dec. 31, 2017	181,737		63	429,459		(6,329)	(237,066)	(4,390)
Net (loss) income	(6,425)
Foreign currency translation adjustment	(521)
Ending Balance at Jun. 30, 2018	176,075		63	430,311		(6,850)	(242,619)	(4,830)
Beginning Balance at Mar. 31, 2018	182,229		63	430,014		(5,936)	(237,159)	(4,753)
Net (loss) income	(5,460)						(5,460)
Foreign currency translation adjustment	(914)					(914)
Exercise of common stock options	33			33
Stock-based compensation	1,290			1,290
Purchase of treasury stock	(77)							(77)
Amortization of preferred stock series A issuance costs		(45)			(45)
Preferred stock Series A dividend		(981)			(981)
Ending Balance at Jun. 30, 2018	176,075		63	430,311		(6,850)	(242,619)	(4,830)
Beginning Balance at Dec. 31, 2018	183,624		64	433,143		(7,270)	(237,444)	(4,869)
Net (loss) income	(9,087)						(9,087)
Foreign currency translation adjustment	(393)					(393)
Exercise of common stock options	284			284
Equity instruments issued in connection with Paradigm Spine acquistion - net of fees	60,730		11	60,719
Stock-based compensation	1,163			1,163
Purchase of treasury stock	(130)							(130)
Amortization of preferred stock series A issuance costs		(46)			(46)
Ending Balance at Mar. 31, 2019	236,145		75	495,263		(7,663)	(246,531)	(4,999)
Beginning Balance at Dec. 31, 2018	183,624		64	433,143		(7,270)	(237,444)	(4,869)
Net (loss) income	(8,343)
Foreign currency translation adjustment	2
Ending Balance at Jun. 30, 2019	238,575		75	496,596		(7,268)	(245,787)	(5,041)
Beginning Balance at Mar. 31, 2019	236,145		75	495,263		(7,663)	(246,531)	(4,999)
Net (loss) income	744						744
Foreign currency translation adjustment	395					395
Exercise of common stock options	111			111
Stock-based compensation	1,267			1,267
Purchase of treasury stock	(42)							(42)
Amortization of preferred stock series A issuance costs		$ (45)			$ (45)
Ending Balance at Jun. 30, 2019	$ 238,575		$ 75	$ 496,596		$ (7,268)	$ (245,787)	$ (5,041)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net loss	$ (8,343)	$ (6,425)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization expense	7,491	7,068
Provision for bad debts and product returns	899	494
Provision for inventory write-downs	3,274	10,865
Amortization of deferred revenue	(2,585)	(2,435)
Deferred income tax benefit	(2,703)	(2,671)
Stock-based compensation	2,430	2,570
Asset impairment and abandonments	15	4,644
Gain on acquisition contingency	(1,590)
Paid in kind interest expense	1,473
Other	877	610
Change in assets and liabilities:
Accounts receivable	(3,509)	(7,640)
Inventories	(1,078)	(411)
Accounts payable	(9,675)	(3,803)
Accrued expenses	(2,217)	(2,592)
Deferred revenue	2,000	2,000
Other operating assets and liabilities	145	7,104
Net cash (used in) provided by operating activities	(13,111)	9,378
Cash flows from investing activities:
Purchases of property, plant and equipment	(6,912)	(3,856)
Patent and acquired intangible asset costs	(1,126)	(728)
Net cash used in investing activities	(107,959)	(25,584)
Cash flows from financing activities:
Proceeds from exercise of common stock options	395	1,429
Proceeds from long-term obligations	115,000	74,425
Payments of debt issuance costs	(729)
Payments on long-term obligations		(66,750)
Other financing activities		(1,026)
Net cash provided by financing activities	114,666	8,078
Effect of exchange rate changes on cash and cash equivalents	(27)	(7)
Net decrease in cash and cash equivalents	(6,431)	(8,135)
Cash and cash equivalents, beginning of period	10,949	22,381
Cash and cash equivalents, end of period	4,518	14,246
Supplemental cash flow disclosure:
Cash paid for interest	2,732	1,974
Income tax refunds, net of payments	1,982	6,698
Non-cash acquisition of property, plant and equipment	456	676
Increase in accrual for dividend payable		1,947
Non-cash common stock issuance	60,730
Zyga Technology Inc [Member]
Cash flows from investing activities:
Payments to acquire businesses		$ (21,000)
Paradigm Spine [Member]
Cash flows from investing activities:
Payments to acquire businesses	(99,921)
Supplemental cash flow disclosure:
Non-cash acquisition of Paradigm	$ 60,730

Operations and Organization

Operations and Organization	6 Months Ended
	Jun. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Operations and Organization	1. Operations and Organization RTI Surgical Holdings, Inc. and Subsidiaries (defined as the “Company” for matters occurring after March 8, 2019)

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	2. Basis of Presentation The accompanying unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring accruals, which the Company considers necessary for a fair presentation of the results of operations for the periods shown. The condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X, and, therefore, do not include all information and footnotes necessary for a fair presentation of consolidated financial position, results of operations, comprehensive loss and cash flows in conformity with accounting principles generally accepted in the United States of America (“GAAP”). All intercompany balances and transactions have been eliminated in consolidation. The condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries, RTI Surgical, Inc. (defined as “Legacy RTI” for matters occurring after March 8, 2019, and as the “Company” for matters occurring before March 8, 2019), Paradigm Spine, LLC (“Paradigm”), Pioneer Surgical Technology, Inc. (“Pioneer Surgical”), Tutogen Medical, Inc. (“TMI”), and Zyga Technology, Inc. (“Zyga”). The condensed consolidated financial statements also include the accounts of RTI Donor Services, Inc. (“RTIDS”), which is a controlled entity. Prior to the completion of the acquisition of Paradigm, the financial statements were that of RTI Surgical Inc. and subsidiaries. Subsequently, RTI Surgical Holdings, Inc. and Subsidiaries is the successor reporting company. See Note 6 for further discussion.

Recently Issued and Adopted Acc

Recently Issued and Adopted Accounting Standards	6 Months Ended
	Jun. 30, 2019
Accounting Changes And Error Corrections [Abstract]
Recently Issued and Adopted Accounting Standards	3. Recently Issued and Adopted Accounting Standards In February 2016, the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASU”) Leases (Topic 842) “Leases (Topic 840).” Effective January 1, 2019, the Company adopted the new lease accounting standard using the optional transition method which allowed us to continue to apply the guidance under the lease standard in effect at the time in the comparative periods presented. In addition, the Company elected the package of practical expedients, which allowed us to not reassess whether any existing contracts contain a lease, to not reassess historical lease classification as operating or finance leases, and to not reassess initial direct costs. The Company has not elected the practical expedient to use hindsight to determine the lease term for its leases at transition. The Company has also elected the practical expedient allowing us to not separate the lease and non-lease components for all classes of underlying assets. Adoption of this standard resulted in the recording of operating lease ROU assets and corresponding operating lease liabilities of $3,164 and $3,155, respectively, as of January 1, 2019 with no impact on accumulated deficit. Financial position for reporting periods beginning on or after January 1, 2019, are presented under the new guidance, while prior period amounts are not adjusted and continue to be reported in accordance with previous guidance. Note disclosures required in Topic 842 are reported in Note 4, Leases.

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	4 . Leases The Company’s leases are classified as operating leases and includes office space, automobiles, and copiers. The Company does not have any finance leases and the Company’s operating leases do not have any residual value guarantees, restrictions or covenants. The Company does not have any leases that have not yet commenced as of June 30, 2019. The majority of our leases have remaining lease terms of 1 to 14 years, some of which include options to extend or terminate the leases. The option to extend is only included in the lease term if the Company is reasonably certain of exercising that option. Operating lease ROU assets are presented within other assets-net on the Condensed Consolidated Balance Sheet. The current portion of operating lease liabilities are presented within accrued expenses, and the non-current portion of operating lease liabilities are presented within other long-term liabilities on the Condensed Consolidated Balance Sheet. A subset of the Company’s automobile and copier leases contain variable payments. The variable lease payments for such automobile leases are based on actual mileage incurred at the standard contractual rate. The variable lease payments for such copier leases are based on actual copies incurred at the standard contractual rate. The components of operating lease expense were as follows: For the Three Months Ended For the Six Months Ended June 30, 2019 June 30, 2019 Operating lease cost $ 440 $ 784 Short-term operating lease cost — 36 Total operating lease cost $ 440 $ 820 The Company does not have any variable lease costs. Supplemental cash flow information related to operating leases was as follows: For the Three Months Ended For the Six Months Ended June 30, 2019 June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities $ 397 $ 691 ROU assets obtained in exchange for lease obligations — 34 Supplemental balance sheet information related to operating leases was as follows: Balance Sheet Classification June 30, 2019 Assets: Right-of-use assets Other assets - net $ 3,546 Liabilities: Current Accrued expenses $ 1,505 Noncurrent Other long-term liabilities 2,117 Total operating lease liabilities $ 3,622 As of June 30, 2019, the weighted-average remaining lease term was 4.6 years. The Company’s lease agreements do not provide a readily determinable implicit rate nor is it available to the Company from its lessors. Instead, the Company estimates its incremental borrowing rate based on information available at lease commencement in order to discount lease payments to present value. The weighted-average discount rate of the Company’s operating leases was 4.7%, as of June 30, 2019. As of June 30, 2019, maturities of operating lease liabilities were as follows: Maturity of Operating Lease Liabilities June 30, 2019 2019 (remaining) $ 879 2020 1,368 2021 565 2022 224 2023 160 2024 and beyond 875 Total future minimum lease payments 4,071 Less imputed interest (449 ) Total $ 3,622 As previously disclosed in our 2018 Annual Report on Form 10-K, which followed the lease accounting prior to adoption of ASC 842, future commitments relating to operating leases for the five years and period thereafter as of December 31, 2018 were as follows: Maturity of Operating Lease Liabilities December 31, 2018 2019 $ 1,374 2020 806 2021 276 2022 162 2023 166 2024 and beyond 882 Total future minimum lease payments $ 3,666

Revenue from Contracts with Cus

Revenue from Contracts with Customers	6 Months Ended
	Jun. 30, 2019
Revenue From Contract With Customer [Abstract]
Revenue from Contracts with Customers	5. Revenue from Contracts with Customers The Company operates in one reportable segment composed of four lines of business. The reporting of the Company’s lines of business are composed primarily of four franchises: spine; sports; o riginal equipment manufacturer (“OEM”) For the Three Months Ended For the Six Months Ended June 30, June 30, 2019 2018 2019 2018 Revenues: Spine $ 26,671 $ 18,934 $ 46,676 $ 38,197 Sports 14,024 14,190 27,803 27,625 OEM 32,483 31,170 61,474 61,290 International 9,129 6,391 16,095 13,463 Total revenues from contracts with customers $ 82,307 $ 70,685 $ 152,048 $ 140,575 The following table presents revenues recognized at a point in time and over time for the three and six months ended June 30, 2019 and 2018: For the Three Months Ended For the Six Months Ended June 30, June 30, 2019 2018 2019 2018 Revenue recognized at a point in time $ 66,469 $ 61,534 $ 119,070 $ 121,697 Revenue recognized over time 15,838 9,151 32,978 18,878 Total revenues from contracts with customers $ 82,307 $ 70,685 $ 152,048 $ 140,575 The Company’s performance obligations consist mainly of transferring control of implants identified in the contracts. Some of the Company’s contracts offer assurance-type warranties in connection with the sale of a product to a customer. Assurance-type warranties provide a customer with assurance that the related product will function as the parties intended because it complies with agreed-upon specifications. Such warranties do not represent a separate performance obligation and are not material to the condensed consolidated financial statements. The opening and closing balances of the Company’s accounts receivable, contract asset and current and long-term contract liability for the six months ended June 30, 2019 and 2018 are as follows: Contract Contract Liability Accounts Liability (Long- Receivable (Current) Term) Opening 1/1/2019 $ 48,351 $ 5,425 $ 744 Closing 6/30/2019 56,163 5,292 325 Increase/(decrease) 7,812 (133 ) (419 ) Contract Contract Liability Accounts Liability (Long- Receivable (Current) Term) Opening 1/1/2018 $ 39,095 $ 5,978 $ 3,741 Closing 6/30/2018 45,576 6,210 3,155 Increase/(decrease) 6,481 232 (586 ) Contract liabilities consist primarily of the return allowance described above, and of deferred revenue arising from upfront and annual exclusivity fees. The difference between the opening and closing balances of the Company’s contract liabilities primarily results from the Company’s performance of the Company’s contractual obligations over time. The Company recognizes sales commissions as incurred because the amortization period is less than one year. The Company does not incur other incremental costs relating to obtaining a contract with a customer, and therefore, does not have contract assets, or impairment losses associated therewith. Revenue recognized for the six months ended June 30, 2019 and 2018, from amounts included in contract liabilities at the beginning of the period were $2,584 and $2,434, respectively.

Acquisition of Paradigm Spine,

Acquisition of Paradigm Spine, LLC	6 Months Ended
	Jun. 30, 2019
Paradigm Spine [Member]
Acquisition	6. Acquisition of Paradigm Spine, LLC On March 8, 2019, pursuant to the Master Transaction Agreement (the “Master Transaction Agreement”), dated as of November 1, 2018, by and among Legacy RTI, PS Spine Holdco, LLC, a Delaware limited liability company (“PS Spine”), the Company, and Bears Merger Sub, Inc., a Delaware corporation and direct wholly owned subsidiary of the Company (“Merger Sub”), the Company acquired all of the outstanding equity interests of Paradigm, through a transaction in which: (i) PS Spine contributed all of the issued and outstanding equity interests in Paradigm to the Company (the “Contribution”); (ii) Merger Sub merged with and into Legacy RTI (the “Merger”), with Legacy RTI surviving as a wholly owned direct subsidiary of the Company; and (iii) the Company was renamed “RTI Surgical Holdings, Inc.” (collectively, the “Transaction”). Legacy RTI retained its existing name “RTI Surgical, Inc.” Pursuant to the Master Transaction Agreement: (i) each share of common stock, par value $0.001 per share, of Legacy RTI issued and outstanding immediately prior to the Transaction (other than shares held by Legacy RTI as treasury shares or by the Company or Merger Sub immediately prior to the Transaction, which were automatically cancelled and ceased to exist) was converted automatically into one fully paid and non-assessable share of Company common stock , par value $0.001 per share; (ii) each share of Series A convertible preferred stock, par value $0.001 per share, of Legacy RTI issued and outstanding immediately prior to the Transaction (other than shares held by Legacy RTI as treasury shares or by the Company or Merger Sub immediately prior to the Transaction, which were automatically cancelled and ceased to exist) was converted automatically into one fully paid and non-assessable share of Series A convertible preferred stock, par value $0.001 per share, of the Company; and (iii) each stock option and restricted stock award granted by Legacy RTI was converted into a stock option or restricted stock award, as applicable, of the Company with respect to an equivalent number of shares of the Company common stock on the same terms and conditions as were applicable prior to the closing. The consideration for the Contribution was $100,000 (the “Cash Consideration Amount”) in cash, subject to adjustment as described below, and 10,729,614 shares of Company common stock (the “Stock Consideration Amount”). The Stock Consideration Amount was determined by dividing $50,000 by the volume weighted average closing price of Legacy RTI’s common stock for the five business days prior to November 1, 2018 (the “Legacy RTI Price”). The Cash Consideration Amount was adjusted by a: (i) positive dollar for dollar adjustment based on the amount of Paradigm’s cash and cash equivalents at closing; (ii) negative dollar for dollar adjustment based on the amount of outstanding indebtedness and unpaid transaction expenses of Paradigm at closing; and (iii) negative dollar for dollar adjustment to the extent that Paradigm’s working capital (excluding indebtedness and transaction expenses) at closing did not exceed the working capital target of $7,000. In addition to the Cash Consideration Amount and the Stock Consideration Amount, the Company may be required to make further cash payments or issue additional shares of Company common stock to PS Spine in an amount up to $50,000 of shares of Company common stock to be valued based upon the Legacy RTI Price and an additional $100,000 of cash and/or Company common stock to be valued at the time of issuance, in each case, if certain revenue targets are achieved between closing, March 8, 2019, and December 31, 2022. The Company estimates a contingent liability related to the revenue based earnout of $94,976 utilizing a Monte-Carlo simulation model. A Monte-Carlo simulation is an analytical method used to estimate fair value by performing a large number of simulations or trial runs and thereby determining a value based on the possible outcomes. Accounted for as a liability to be revalued at each reporting period, the preliminary f The Company has accounted for the acquisition of Paradigm under Accounting Standards Codification (“ASC”) 805, Business Combinations The purchase price was financed as follows: (In thousands) Cash proceeds from second lien credit agreement $ 100,000 Fair market value of securities issued 60,730 Fair market value of contingent earnout 94,976 Total purchase price $ 255,706 The preliminary valuation of the acquired assets and liabilities is not yet complete, and as such, the Company has not yet finalized its allocation of the purchase price for the acquisition. The table below represents the preliminary allocation of the total consideration to Paradigm’s tangible assets and liabilities based on management’s preliminary estimate of their respective fair values as of March 8, 2019. During the three months ended June 30, 2019, the Company made the following changes to the fair values of acquired assets and liabilities as follows: Balance at June 30, 2019 March 31, 2019 Change (In thousands) Cash $ 79 $ 79 $ - Accounts receivable 5,220 5,220 - Inventories 43,084 5,898 37,186 Other current assets 1,693 1,752 (59 ) Property, plant and equipment 379 379 - Current liabilities (6,380 ) (6,169 ) (211 ) Net tangible assets acquired 44,075 7,159 36,916 Goodwill 211,631 248,547 (36,916 ) Total net assets acquired $ 255,706 $ 255,706 $ - As of March 8, 2019, the inventory fair value was composed of current inventory of $19,703 and non-current inventory of $23,381. As a result of the inventory purchase price adjustment to fair value Paradigm inventory, the Company recorded $2,936 to costs of processing and distribution for the six months ended June 30, 2019, which includes $477 for the inventory sold over the three months ended March 31, 2019. Total net assets acquired as of March 8, 2019, are all part of the Company’s only operating segment. Fair values are based on management’s estimates and assumptions including variations of the income approach, the cost approach and the market approach. The Company believes that the acquisition of Paradigm, a spine focused business, offers the potential for substantial strategic and financial benefits. The transaction further advances the Company’s strategic transformation focused on reducing complexity, driving operational excellence and accelerating growth. The Company believes the acquisition will enhance stockholder value through, among other things, enabling the Company to capitalize on the following strategic advantages and opportunities: • Paradigm will strengthen the Company’s spine portfolio with the addition of the coflex® Interlaminar Stabilization® device. Coflex is a differentiated and minimally invasive motion preserving stabilization implant that is FDA PMA-approved for the treatment of moderate to severe lumbar spinal stenosis (“LSS”) in conjunction with decompression. • Coflex allows the Company to provide surgeons who treat patients with moderate to severe LSS with a PMA-approved device supported by more than 12 years of clinical data and with expanding coverage from payors. These potential benefits resulted in the Company paying a premium for Paradigm resulting in the preliminary recognition of $211,631 of goodwill assigned to the Company’s only operating segment and reporting unit. The amount of Paradigm’s revenues and net income since the March 8, 2019, acquisition date, included in the Company’s Condensed Consolidated Statement of Comprehensive Loss for the six months ended June 30, 2019, excluding acquisition and integration related costs of approximately $10,910, are $12,096 and $490, respectively. The following unaudited pro forma information shows the results of the Company’s operations as though the acquisition had occurred as of the beginning of the prior comparable period, January 1, 2018, (in thousands, except per share data): For the Six Months Ended June 30, 2019 2018 Revenues $ 19,074 $ 21,252 Net loss applicable to common shares (10,406 ) (19,169 ) Net loss applicable to common shares excluding acquistion and integration costs (1,219 ) (19,169 ) The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the actual results of operations had the acquisition taken place as of the beginning of the periods presented, or the results that may occur in the future. The pro forma net loss was adjusted to exclude $10,910 of acquisition and integration related costs net of tax of $1,723 incurred during the six months ended June 30, 2019.

Acquisition of Zyga Technology,

Acquisition of Zyga Technology, Inc	6 Months Ended
	Jun. 30, 2019
Zyga Technology Inc [Member]
Acquisition	7. Acquisition of Zyga Technology, Inc. On January 4, 2018, the Company acquired Zyga Technology, Inc. (“Zyga”), a leading spine-focused medical device company that develops and produces innovative minimally invasive devices to treat underserved conditions of the lumbar spine. Zyga’s primary product is the SImmetry® Sacroiliac Joint Fusion System. Under the terms of the merger agreement dated January 4, 2018, the Company acquired Zyga for $21,000 in consideration paid at closing (consisting of borrowings of $18,000 on the Company’s revolving credit facility and $3,000 cash on hand), $1,000 contingent upon the successful achievement of a clinical milestone, and a revenue based earnout consideration of up to $35,000. Based on a probability weighted model, the Company estimates a contingent liability related to the clinical milestone and revenue based earnout of $4,986. Acquisition related costs were approximately $1,430, of which approximately $630 was incurred in 2017 and $800 was incurred for the three months ended March 31, 2018 and is reflected separately in the accompanying Consolidated Statements of Comprehensive (Loss) Income. The Company has accounted for the acquisition of Zyga under ASC 805, Business Combinations The purchase price was financed as follows: (In thousands) Cash proceeds from revolving credit facility $ 18,000 Cash from RTI Surgical 3,000 Total purchase price $ 21,000 In the fourth quarter of 2018, the Company completed its valuation of the purchase price allocation. The table below represents the final allocation of the total consideration to Zyga’s tangible and intangible assets and liabilities fair values as of January 4, 2018. (In thousands) Inventories $ 1,099 Accounts receivable 573 Other current assets 53 Property, plant and equipment 151 Other assets 26 Deferred tax assets 4,715 Current liabilities (947 ) Acquisition contingencies (4,986 ) Net tangible assets acquired 684 Other intangible assets 6,760 Goodwill 13,556 Total net assets acquired $ 21,000 Total net assets acquired as of January 4, 2018, are all part of the Company’s only operating segment. Fair values are based on management’s estimates and assumptions including variations of the income approach, the cost approach and the market approach. Other intangible assets include patents of $6,500 with a useful life of 13 years, trademarks of $80 with a useful life of 1 year and selling and marketing relationships of $180 with a useful life of 7 years. The Company believes that the acquisition of Zyga has offered and continues to offer the potential for substantial strategic and financial benefits. The transaction further advances our strategic transformation focused on reducing complexity, driving operational excellence and accelerating growth. The Company believes the acquisition will enhance stockholder value through, among other things, enabling the Company to capitalize on the following strategic advantages and opportunities: • Zyga’s innovative minimally invasive treatment should accentuate our spine portfolio and opens significant opportunities to accelerate our Spine-focused expansion strategy. • Zyga should leverage the core competencies of our Spine franchise by pursuing niche differentiated products, to gain scale and customer retention and support portfolio pull-through. These potential benefits resulted in the Company paying a premium for Zyga resulting in the recognition of $13,556 of goodwill assigned to the Company’s only operating segment and reporting unit. For tax purposes, none of the goodwill is deductible. The following unaudited pro forma information shows the results of the Company’s operations as though the acquisition had occurred as of the beginning of the prior comparable period, January 1, 2017, (in thousands, except per share data): For the Six Months Ended June 30, 2018 2017 Revenues $ 2,439 $ 2,364 Net loss applicable to common shares (1,053 ) (2,192 ) The pro forma results have been prepared for comparative purposes only and are not necessarily indicative of the actual results of operations had the acquisition taken place as of the beginning of the periods presented, or the results that may occur in the future. These amounts exclude costs incurred which are directly attributable to the acquisition, and which do not have a continuing impact on the combined companies’ operating results.

Stock-Based Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	8. Stock-Based Compensation The Company’s policy is to grant stock options at an exercise price equal to 100% of the market value of a share of common stock at closing on the date of the grant. The Company’s stock options generally have five to ten-year contractual terms and vest over a one to five-year period from the date of grant. The Company’s policy is to grant restricted stock awards at a fair value equal to 100% of the market value of a share of common stock at closing on the date of the grant. The Company’s restricted stock awards generally vest over one to three-year periods. 2018 Incentive Compensation Plan – On April 30, 2018, the Company’s stockholders approved and adopted the 2018 Incentive Compensation Plan (the “2018 Plan”). The 2018 Plan provides for the grant of incentive and nonqualified stock options and restricted stock to key employees, including officers and directors of the Company and consultants and advisors. The 2018 Plan allows for up to 5,726,035 shares of common stock to be issued with respect to awards granted. Stock Options As of June 30, 2019, there was $1,792 of total unrecognized stock-based compensation related to nonvested stock options. The expense related to these stock options is expected to be recognized over a weighted-average period of 2.25 years. The following table summarizes information about stock options outstanding, exercisable and available for grant as of June 30, 2019: Weighted Weighted Average Average Remaining Aggregate Number of Exercise Contractual Intrinsic Shares Price Life (Years) Value Outstanding at January 1, 2019 4,295,744 $ 3.76 Granted 374,224 4.71 Exercised (118,500 ) 3.34 Forfeited or expired (65,304 ) 4.08 Outstanding at June 30, 2019 4,486,164 $ 3.84 5.73 $ 2,467 Vested or expected to vest at June 30, 2019 4,192,575 $ 3.80 5.50 $ 2,442 Exercisable at June 30, 2019 2,499,185 $ 3.65 3.65 $ 1,738 Available for grant at June 30, 2019 4,234,994 The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value of stock options for which the fair market value of the underlying common stock exceeded the respective stock option exercise price. Estimated forfeitures are based on the Company’s historical forfeiture activity. Compensation expense recognized for all option grants is net of estimated forfeitures and is recognized over the awards’ respective requisite service periods. Other information concerning stock options are as follows: For the Six Months Ended June 30, 2019 2018 Weighted average fair value of stock options granted $ 1.99 $ 2.02 Aggregate intrinsic value of stock options exercised 161 98 The aggregate intrinsic value of stock options exercised in a period represents the pre-tax cumulative difference, for the stock options exercised during the period, between the fair market value of the underlying common stock and the stock option exercise prices. Restricted Stock Awards As of June 30, 2019, there was $3,561 of total unrecognized stock-based compensation related to unvested restricted stock awards. That expense is expected to be recognized on a straight-line basis over a weighted-average period of 1.87 years. The following table summarizes information about unvested restricted stock awards as of June 30, 2019: Weighted Average Number of Grant Date Shares Fair Value Unvested at January 1, 2019 1,075,215 $ 4.29 Granted 625,476 4.85 Vested (385,185 ) 4.17 Forfeited (9,865 ) 4.43 Unvested at June 30, 2019 1,305,641 $ 4.61 Restricted Stock Units As of June 30, 2019, there was $1,198 of total unrecognized stock-based compensation related to unvested restricted stock units. That expense is expected to be recognized on a straight-line basis over a weighted-average period of 2.50 years. The following table summarizes information about unvested restricted stock units as of June 30, 2019: Weighted Average Number of Grant Date Shares Fair Value Unvested at January 1, 2019 — $ — Granted 226,352 7.41 Vested — — Forfeited — — Unvested at June 30, 2019 226,352 $ 7.41 For the three and six months ended June 30, 2019 and 2018, the Company recognized stock-based compensation as follows: For the Three Months Ended For the Six Months Ended June 30, June 30, 2019 2018 2019 2018 Stock-based compensation: Costs of processing and distribution $ 36 $ 33 $ 72 $ 66 Marketing, general and administrative 1,216 1,242 2,328 2,474 Research and development 15 15 30 30 Total $ 1,267 $ 1,290 $ 2,430 $ 2,570

Net Income Per Common Share

Net Income Per Common Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Net Income Per Common Share	9. Net Income Per Common Share A reconciliation of the number of shares of common stock used in the calculation of basic and diluted net income per common share is presented below: For the Three Months Ended For the Six Months Ended June 30, June 30, 2019 2018 2019 2018 Basic shares 75,144,488 63,405,708 70,409,839 63,400,737 Effect of dilutive securities: Stock options 823,707 — — — Preferred stock Series A 15,152,761 — — — Diluted shares 91,120,956 63,405,708 70,409,839 63,400,737 For the three months ended June 30, 2019 and 2018, approximately 1,537,678 and 1,590,662, respectively, and for the six months ended June 30, 2019 and 2018, approximately 1,429,442 and 1,447,911, respectively, of issued stock options were not included in the computation of diluted net loss per common share because they were anti-dilutive because their exercise price exceeded the market price. For the three months ended June 30, 2019, options to purchase 823,707 shares of common stock were included in the computation of diluted income per share because dilutive shares are factored into this calculation when net income is reported. For the three months ended June 30, 2018, options to purchase 659,785, and for the six months ended June 30, 2019 and 2018, options to purchase 808,904 and 618,776, respectively, shares of common stock were not included in the computation of diluted loss per share because dilutive shares are not factored into this calculation when a net loss is reported. For the three months ended June 30, 2019 2018 and for the six 2019 and 2018

Inventories

Inventories	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Inventories	10. Inventories Inventories by stage of completion are as follows: June 30, December 31, 2019 2018 Unprocessed tissue, raw materials and supplies $ 25,014 $ 24,211 Tissue and work in process 30,502 31,796 Implantable tissue and finished goods 58,585 51,464 Purchase price adjustment for finished goods 34,250 - Total 148,351 107,471 Less current portion 127,906 107,471 Long-term portion $ 20,445 $ - For the three months ended June 30, 2019 and 2018, the Company had inventory write-downs of $1,744 and $8,224, respectively, and for the six months ended June 30, 2019 and 2018, the Company had inventory write-downs of $3,274 and $10,865, respectively, relating primarily to product obsolescence. As of June 30, 2019, the long-term portion of inventory relates to acquired Paradigm inventory which comprises of finished goods and purchase price adjustment of $1,608 and $18,837, respectively, s ee Note 6. Included in the three months ended March 31, 2018, are $1,023 of product obsolescence which was due to the rationalization of our international distribution infrastructure. Included in the three months ended June 30, 2018, was $6,559 of inventory write-off which was due to the suspension of the map3® implant.

Prepaid and Other Current Asset

Prepaid and Other Current Assets	6 Months Ended
	Jun. 30, 2019
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Prepaid and Other Current Assets	11. Prepaid and Other Current Assets Prepaid and Other Current Assets are as follows: June 30, December 31, 2019 2018 Income tax receivable $ 2,685 $ 3,920 Prepaid expenses 5,275 4,127 Other 773 744 $ 8,733 $ 8,791

Property, Plant and Equipment

Property, Plant and Equipment	6 Months Ended
	Jun. 30, 2019
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	12. Property, Plant and Equipment Property, plant and equipment are as follows: June 30, December 31, 2019 2018 Land $ 2,020 $ 2,020 Buildings and improvements 58,093 58,093 Processing equipment 44,624 42,599 Surgical instruments 25,829 24,070 Office equipment, furniture and fixtures 1,973 1,877 Computer equipment and software 19,102 18,873 Construction in process 11,593 8,934 163,234 156,466 Less accumulated depreciation (83,543 ) (78,512 ) $ 79,691 $ 77,954 For the three months ended June 30, 2019 and 2018, the Company had depreciation expense in connection with property, plant and equipment of $2,800 and $2,524, respectively, and for the six months ended June 30, 2019 and 2018, the Company had depreciation expense in connection with property, plant and equipment of $5,539 and $5,147, respectively. For the three months ended June 30, 2018, the Company had $1,797 of asset impairment and abandonment charges relating to the suspension of the map3® implant.

Goodwill

Goodwill	6 Months Ended
	Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	13. Goodwill Goodwill acquired during the six months ended June 30, 2019, includes the excess of the Paradigm purchase price over the sum of the amounts assigned to assets acquired less liabilities assumed. June 30, December 31, 2019 2018 Balance at January 1 $ 59,798 $ 46,242 Goodwill acquired related to Zyga acquisition — 13,556 Goodwill acquired related to Paradigm acquisition 211,631 — Balance at end of period $ 271,429 $ 59,798

Other Intangible Assets

Other Intangible Assets	6 Months Ended
	Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Other Intangible Assets	14. Other intangible assets are as follows: June 30, 2019 December 31, 2018 Gross Net Gross Net Carrying Accumulated Carrying Carrying Accumulated Carrying Amount Amortization Amount Amount Amortization Amount Patents $ 16,256 $ 4,727 $ 11,529 $ 16,092 $ 4,194 $ 11,898 Acquired licensing rights 7,528 1,902 5,626 11,852 6,468 5,384 Marketing and procurement and other intangible assets 20,205 12,091 8,114 20,356 11,279 9,077 Total $ 43,989 $ 18,720 $ 25,269 $ 48,300 $ 21,941 $ 26,359 For the three months ended June 30, 2019 and 2018, the Company had amortization expense of other intangible assets of $995 and $960, respectively , and for . For the three months ended June 30, 2018, the Company had $2,718 of asset impairment and abandonment charges map3® implant. At June 30, 2019, management’s estimates of future amortization expense for the next five years are as follows: Amortization Expense 2019 (remaining) $ 2,100 2020 4,100 2021 4,100 2022 4,100 2023 1,800 2024 1,800

Accrued Expenses

Accrued Expenses	6 Months Ended
	Jun. 30, 2019
Other Liabilities Disclosure [Abstract]
Accrued Expenses	15. Accrued Expenses Accrued expenses are as follows: June 30, December 31, 2019 2018 Accrued compensation $ 6,175 $ 8,678 Accrued severance and restructuring costs 758 931 Accrued executive transition costs — 43 Accrued distributor commissions 3,825 3,907 Accrued donor recovery fees 4,692 4,088 Other 9,218 7,036 $ 24,668 $ 24,683

Short and Long-Term Obligations

Short and Long-Term Obligations	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Short and Long-Term Obligations	16. Short and Long-Term Obligations Short and long-term obligations are as follows: June 30, December 31, 2019 2018 Ares Term loan $ 101,473 $ — JPM facility 65,000 50,000 Less unamortized debt issuance costs (1,392 ) (927 ) Total 165,081 49,073 Less current portion — — Long-term portion $ 165,081 $ 49,073 On June 5, 2018, the Company, along with its wholly-owned subsidiary, Pioneer Surgical, entered into a Credit Agreement (the “2018 Credit Agreement”), as borrowers, with JP Morgan Chase Bank, N.A., as lender (together with the various financial institutions as in the future may become parties thereto, the “JPM Lenders”) and as administrative agent for the JPM Lenders. The 2018 Credit Agreement provides for a revolving credit facility in the aggregate principal amount of up to $100,000 (the “JPM Facility”) (subsequently reduced to $75,000, as described below). The Company and Pioneer Surgical will be able to, at their option, and subject to customary conditions and JPM Lender approval, request an increase to the JPM Facility in an amount not to exceed $50,000. The JPM Facility is guaranteed by the Company’s domestic subsidiaries and is secured by: (i) substantially all of the assets of the Company and Pioneer Surgical; (ii) substantially all of the assets of each of the Company’s domestic subsidiaries; and (iii) 65% of the stock of the Company’s foreign subsidiaries. The initial borrowings made under the 2018 Credit Agreement will bear interest at a rate per annum equal to the monthly REVLIBOR30 Rate (“CBFR Loans”) plus an adjustable margin of up to 2.00% (the “CBFR Rate”). The Company may elect to convert the interest rate for the initial borrowings to a rate per annum equal to the adjusted LIBO Rate (“Eurodollar Loans”) plus an adjustable margin of up to 2.00% (the “JPM Eurodollar Rate”). For all subsequent borrowings, the Company may elect to apply either the CBFR Rate or JPM Eurodollar Rate. The applicable margin is subject to adjustment after the end of each fiscal quarter, based upon the Company’s average quarterly availability. The maturity date of the JPM Facility is June 5, 2023. The Company may make optional prepayments on the JPM Facility without penalty. The Company paid certain customary closing costs and bank fees upon entering into the 2018 Credit Agreement. The Company is subject to certain affirmative and negative covenants, including (but not limited to), covenants limiting the Company’s ability to: incur certain additional indebtedness; create certain liens; enter into sale and leaseback transactions; and consolidate or merge with, or convey, transfer or lease all or substantially all of its assets to another person. The Company is required to maintain a minimum fixed charge coverage ratio of at least 1.00:1.00 (the “JPM Required Minimum Fixed Charge Coverage Ratio”) during either of the following periods (each, a “JPM Covenant Testing Period”): (i) a period beginning on a date that a default has occurred and is continuing under the loan documents entered into by the Company in conjunction with the 2018 Credit Agreement through the first date on which no default has occurred and is continuing; or (ii) a period beginning on a date that availability under the JPM Facility is less than the specified covenant testing threshold and continuing until availability under the JPM Facility is greater than or equal to the specified covenant testing threshold for thirty (30) consecutive days. The JPM Required Minimum Fixed Charge Coverage Ratio is measured on the last day of each calendar month during the JPM Covenant Testing Period (each a “JPM Calculation Date”), and is calculated using the minimum fixed charge coverage ratio for the twelve (12) consecutive months ending on each JPM Calculation Date. The amounts owed under the 2018 Credit Agreement may be accelerated upon the occurrence of certain events of default customary for facilities for similarly rated borrowers. First Amendment to Credit Agreement and Joinder Agreement On March 8, 2019, the Company entered into a First Amendment to Credit Agreement and Joinder Agreement dated as of March 8, 2019 (the “2019 First Amendment”), among the Company, Legacy RTI, as a borrower, Pioneer Surgical, as a borrower, the other loan parties thereto as guarantors, JP Morgan Chase Bank, N.A., as lender (together with the various financial institutions as in the future may become parties thereto) and as administrative agent for the JPM Lenders. The 2019 First Amendment amended the 2018 Credit Agreement by: (i) reducing the aggregate revolving commitments available to Legacy RTI and Pioneer Surgical from $100,000 to $75,000; (ii) joining the Company and Paradigm, and its domestic subsidiaries as guarantors and loan parties to the 2018 Credit Agreement; (iii) permitting the Ares Term Loan (as defined below); and (iv) making certain other changes to the 2018 Credit Agreement consistent with the foregoing including pro rata reductions to certain thresholds that were based on the aggregate commitments under the 2018 Credit Agreement. At June 30, 2019, the interest rate for the JPM Facility was 4.19%. As of June 30, 2019, there was $65,000 outstanding on the JPM Facility and total remaining available credit on the JPM Facility was $10,000. The Company’s ability to access the JPM Facility is subject to and can be limited by the Company’s compliance with the Company’s financial and other covenants. The Company was in compliance with the financial covenants related to the JPM Facility as of June 30, 2019. Second Lien Credit Agreement and Term Loan On March 8, 2019, Legacy RTI entered into a Second Lien Credit Agreement dated as of March 8, 2019 (the “2019 Credit Agreement”), among Legacy RTI, as a borrower, the other loan parties thereto as guarantors (together with Legacy RTI, the “Ares Loan Parties”), Ares Capital Corporation, as lender (together with the various financial institutions as in the future may become parties thereto, the “Ares Lenders”) and as administrative agent for the Ares Lenders. The 2019 Credit Agreement provides for a term loan in the principal amount of up to $100,000 (the “Ares Term Loan”). The Ares Term Loan was advanced in a single borrowing on March 8, 2019. The Ares Term Loan is guaranteed by the Company and each of the Company’s domestic subsidiaries and is secured by: (i) substantially all of the assets of Legacy RTI; (ii) substantially all of the assets of the Company; (iii) substantially all of the assets of the Company’s domestic subsidiaries; and (iv) 65% of the stock of the Company’s foreign subsidiaries. The Ares Term Loan will bear interest at a rate per annum equal to, at the option of Legacy RTI: (i) the monthly Base Rate plus an adjustable margin of up to 7.50% (the “Base Rate”); or (ii) the LIBOR plus an adjustable margin of up to 8.50% (the “Ares Eurodollar Rate”). Subject to customary notices, Legacy RTI may elect to convert the Ares Term Loan from Base Rate to Ares Eurodollar Rate or from Ares Eurodollar Rate to Base Rate. The applicable margin is subject to adjustment after the end of each fiscal quarter, based upon the Ares Loan Parties’ total net leverage ratio. At any time during the period commencing on March 8, 2019 and ending on March 8, 2021, if the Ares Loan Parties’ total net leverage ratio is greater than 4.50:1.00, Legacy RTI shall have the option (the “PIK Option”) to elect to pay 50% of the interest that will accrue in the subsequent quarterly period in kind by capitalizing it and adding such amount to the principal balance of the Ares Term Loan. If Legacy RTI exercises the PIK Option, the adjustable margin applicable to the Ares Term Loan shall be increased by 0.75%. The maturity date of the Ares Term Loan is December 5, 2023. Legacy RTI may make optional prepayments on the Ares Term Loan, provided that any such optional prepayments made on or prior to March 8, 2022, shall be subject to a make whole premium or a prepayment price, as the case may be. Legacy RTI is required to make mandatory prepayments of the Ares Term Loan based on excess cash flow and the Ares Loan Parties’ total net leverage ratio, upon the incurrence of certain indebtedness not otherwise permitted under the 2019 Credit Agreement, upon consummation of certain dispositions, and upon the receipt of certain proceeds of casualty events. Legacy RTI was required to pay certain customary closing costs and bank fees upon entering into the 2019 Credit Agreement. Legacy RTI is subject to certain affirmative and negative covenants, including (but not limited to), covenants limiting Legacy RTI’s ability to: incur certain additional indebtedness; create certain liens; enter into sale and leaseback transactions; and consolidate or merge with, or convey, transfer or lease all or substantially all of its assets to another person. During any period beginning on a date that either: (i) a default has occurred and is continuing under the loan documents entered into by Legacy RTI in conjunction with the Credit Agreement (the “Ares Loan Documents”); or (ii) availability under the Ares Term Loan is less than the specified covenant testing threshold, and continuing until either (a) no default has occurred and is continuing under the Ares Loan Documents or (b) availability under the Ares Term Loan is greater than or equal to the specified covenant testing threshold for thirty (30) consecutive days, respectively, (the “Ares Covenant Testing Period”) Legacy RTI is required to maintain a minimum fixed charge coverage ratio of at least 0.91:1.00 (the “Ares Required Minimum Fixed Charge Coverage Ratio”). The Ares Required Minimum Fixed Charge Coverage Ratio is measured on the last day of each calendar month during the Ares Covenant Testing Period (each a “Ares Calculation Date”), and is calculated using the minimum fixed charge coverage ratio for the twelve (12) consecutive months ending on each Ares Calculation Date. The Ares Loan Parties are required to maintain an initial total net leverage ratio of 9.00:1.00, which ratio steps down each fiscal quarter of Legacy RTI resulting in a requirement that the Ares Loan Parties maintain a total net leverage ratio of 3.50:1.00 for the fiscal quarter ending June 30, 2021, and each fiscal quarter ending thereafter. The amounts owed under the 2019 Credit Agreement may be accelerated upon the occurrence of certain events of default customary for facilities for similarly rated borrowers. At June 30, 2019, the interest rate for the Ares Term Loan was 11.16%. The Company was in compliance with the financial covenants related to the Ares Term Loan as of June 30, 2019. For the six months ended June 30, 2019 and 2018, i nterest expense associated with the amortization of debt issuance costs was

Other long-term liabilities

Other long-term liabilities	6 Months Ended
	Jun. 30, 2019
Text Block [Abstract]
Other long-term liabilities	17. Other long-term liabilities Other long-term liabilities are as follows: June 30, December 31, 2019 2018 Acquisition contingencies $ 98,372 $ 4,986 Other 2,562 633 $ 100,934 $ 5,619 Acquisition contingencies represent the Company’s fair value estimate of the Zyga acquisition clinical and revenue

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	18. Income Taxes The Company expects its deferred tax assets of $19,715, net of the valuation allowance at June 30, 2019 of $3,076, to be realized through the generation of future taxable income and the reversal of existing taxable temporary differences. The Company evaluates the need for deferred tax asset valuation allowances based on a more likely than not standard. The ability to realize deferred tax assets depends on the ability to generate sufficient taxable income within the carryback or carryforward periods provided for in the tax law for each applicable tax jurisdiction. The assessment regarding whether a valuation allowance is required or should be adjusted also considers all available positive and negative evidence. It is difficult to conclude a valuation allowance is not required when there is significant objective and verifiable negative evidence, such as cumulative losses in recent years. The Company utilizes a rolling three-years of actual results as the primary measure of cumulative losses in recent years. On a rolling three-years, the Company’s consolidated U.S. operations are in a cumulative income position. However, one U.S. entity is in a three-year cumulative loss position. The Company has established a valuation allowance on its separate state deferred tax assets. The Company’s foreign operations are in a three-year cumulative loss position. Future taxable income exclusive of reversing temporary differences and carryforwards is one source of taxable income that may be available under the tax law to realize a tax benefit for deductible temporary differences and carryforwards. Beginning in 2017, the Company began a restructuring plan, which was finalized in 2018. The efforts under this plan have led the Company to achieve operational improvements and a reduction in complexities which has contributed to current year and projected future earnings within its foreign subsidiary. The Company considers the current year and projected future earnings to be objectively verifiable evidence which will allow the Company to fully utilize its foreign deferred tax assets. The Company believes this positive evidence outweighs the negative evidence of its foreign subsidiaries’ cumulative three-year loss position. As a result, no valuation allowances have been established against its foreign subsidiaries’ deferred tax assets. The Company will continue to regularly assess the realizability of our deferred tax assets. Changes in historical earnings performance and future earnings projections, among other factors, may cause the Company to adjust its valuation allowance, which would impact the Company’s income tax expense in the period the Company determines that these factors have changed.

Preferred Stock

Preferred Stock	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Preferred Stock	19. Preferred Stock On June 12, 2013, the Company and WSHP Biologics Holdings, LLC, an affiliate of Water Street Healthcare Partners, a leading healthcare-focused private equity firm (“Water Street”), entered into an investment agreement. Pursuant to the terms of the investment agreement, the Company issued $50,000 of convertible preferred equity to Water Street in a private placement which closed on July 16, 2013, with preferred stock issuance costs of $1,290. Before July 16, 2018, the preferred stock accrued dividends at a rate of 6% per annum. Dividends that were not paid in cash in any quarter accrued on each outstanding share of preferred stock during such three-month period and accumulated. On August 1, 2018, the Company and Water Street, a related party, entered into an Amended and Restated Certificate of Designation of Series A Convertible Preferred Stock of RTI Surgical, Inc. (the “Amended and Restated Certificate of Designation”). Pursuant to the Amended and Restated Certificate of Designation: (1) dividends on the Series A Preferred Stock will not accrue after July 16, 2018 (in the event of a default by the Company, dividends will begin accruing and will continue to accrue until the default is cured); (2) the Company may not force a redemption of the Series A Preferred Stock prior to July 16, 2020; and (3) the holders of the Series A Preferred Stock may not convert the Series A Preferred Stock into common stock prior to July 16, 2021 (with certain exceptions). The Company evaluated and concluded on a qualitative basis the amendment qualifies as modification accounting to the preferred shares, which did not result in a change in the valuation of the shares. Preferred stock is as follows: Preferred Stock Liquidation Preferred Stock Issuance Net Value Costs Total Balance at January 1, 2019 $ 66,519 $ (293 ) $ 66,226 Accrued dividend payable — — — Amortization of preferred stock issuance costs — 92 92 Balance at June 30, 2019 $ 66,519 $ (201 ) $ 66,318

Severance and Restructuring Cos

Severance and Restructuring Costs	6 Months Ended
	Jun. 30, 2019
Employee Severance [Member]
Severance and Restructuring Costs	20. Severance and Restructuring Costs The Company recorded severance and restructuring costs related to the reduction of our organizational structure which resulted in $2,280 of expenses for the year ended December 31, 2018. As part of the acquisition of Paradigm, management implemented a plan which resulted in $896 of severance expenses for the six months ended June 30, 2019 included in acquisition and integration expenses within the Condensed Consolidated Statements of Comprehensive Gain (Loss). The total severance and restructuring costs are expected to be paid in full by the fourth quarter of 2019. Severance and restructuring payments are made over periods ranging from one month to twelve months and are not expected to have a material impact on cash flows of the Company in any quarterly period. The following table includes a roll-forward of severance and restructuring costs included in accrued expenses, see Note 15. Accrued severance and restructuring costs at January 1, 2019 $ 931 Severance and restructuring costs accrued in 2019 896 Subtotal severance and restructuring costs 1,827 Severance and restructuring related cash payments (1,069 ) Accrued severance and restructuring charges at June 30, 2019 $ 758

Executive Transition Costs

Executive Transition Costs	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Executive Transition Costs	21. Executive Transition Costs The Company recorded Chief Executive Officer retirement and transition costs related to the retirement of our former Chief Executive Officer pursuant to the Executive Transition Agreement dated August 29, 2012 (as amended and extended to date), which resulted in $4,404 of expenses for the year ended December 31, 2016. The total Chief Executive Officer retirement and transition costs were paid in full in the first quarter of 2019. The following table includes a roll-forward of executive transition costs included in accrued expenses, see Note 15. Accrued executive transition costs at January 1, 2019 $ 43 Cash payments (43 ) Accrued executive transition costs at June 30, 2019 $ -

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	22. Commitments and Contingencies Agreement to Acquire Paradigm – On March 8, 2019, pursuant to the Master Transaction Agreement, the Company acquired Paradigm in a cash and stock transaction valued at up to $300,000, consisting of $150,000 on March 8, 2019, plus potential future milestone payments. Established in 2005, Paradigm’s primary product is the coflex® Interlaminar Stabilization® device, a differentiated and minimally invasive motion preserving stabilization implant that is FDA premarket approved for the treatment of moderate to severe lumbar spinal stenosis in conjunction with decompression. Under the terms of the agreement, the Company paid $100,000 in cash and issued 10,729,614 shares of the Company’s common stock. The shares of Company common stock issued on March 8, 2019, were valued based on the volume weighted average closing trading price for the five trading days prior to the date of execution of the definitive agreement, representing $50,000 of value. In addition, the Company may be required to pay up to an additional $150,000 in a combination of cash and Company common stock based on a revenue earnout consideration. Based on a probability weighted model, the Company estimates a preliminary contingent liability related to the revenue based earnout of $94,976. The Company has not completed its preliminary purchase price allocation. Acquisition of Zyga – O n January 4, 2018, the Company acquired Zyga, a leading spine-focused medical device company that develops and produces innovative minimally invasive devices to treat underserved conditions of the lumbar spine. Zyga’s primary product is the SImmetry® Sacroiliac Joint Fusion System. Under the terms of the merger agreement dated January 4, 2018, the Company acquired Zyga for $21,000 in consideration paid at closing (consisting of borrowings of $18,000 on its revolving credit facility and $3,000 cash on hand), $1,000 contingent upon the successful achievement of a clinical milestone, and a revenue based earnout consideration of up to an additional $35,000. Based on a probability weighted model, the Company estimates a contingent liability related to the clinical and revenue milestones of $3,396, see Note 17. Distribution Agreement with Medtronic – On October 12, 2013, the Company entered into a replacement distribution agreement with Medtronic, plc. (“Medtronic”), as amended January 1, 2019, pursuant to which Medtronic will distribute certain allograft implants for use in spinal, general orthopedic and trauma surgery. Under the terms of this distribution agreement, Medtronic is a non-exclusive distributor except for certain specified implants for which Medtronic is the exclusive distributor. Medtronic will maintain its exclusivity with respect to these specified implants unless the cumulative fees received by the Company from Medtronic for these specified implants decline by a certain amount during any trailing 12-month period. The initial term of this distribution agreement was to have been through December 31, 2017. The term automatically renews for successive five-year periods, unless either party provides written notice of its intent not to renew at least one year prior to the expiration of the applicable renewal period. The distribution agreement will continue at least through December 31, 2022. Distribution Agreement with Zimmer Dental Inc. - On September 3, 2010, the Company entered into an exclusive distribution agreement with Zimmer Dental, Inc. (“Zimmer Dental”), a subsidiary of Zimmer, with an effective date of September 30, 2010, as amended from time to time. The Agreement was assigned to Biomet 3i, LLC (“Biomet”), an affiliate of Zimmer Dental, on January 1, 2016. The Agreement has an initial term of ten years. Under the terms of this distribution agreement, the Company agreed to supply sterilized allograft and xenograft implants at an agreed upon transfer price, and Biomet agreed to be the exclusive distributor of the implants for dental and oral applications worldwide (except Ukraine), subject to certain Company obligations under an existing distribution agreement with a third party with respect to certain implants for the dental market. In consideration for Biomet’s exclusive distribution rights, Biomet agreed to the following: 1) payment to the Company of $13,000 within ten days of the effective date (the “Upfront Payment”); 2) annual exclusivity fees (“Annual Exclusivity Fees”) paid annually as long as Biomet maintains exclusivity for the term of the contract to be paid at the beginning of each calendar year; and 3) annual purchase minimums to maintain exclusivity. Upon occurrence of an event that materially and adversely affects Biomet’s ability to distribute the implants, Biomet may be entitled to certain refund rights with respect to the then current Annual Exclusivity Fee, where such refund would be in an amount limited by a formula specified in this agreement that is based substantially on the occurrence’s effect on Biomet’s revenues. The Upfront Payment, the Annual Exclusivity Fees and the fees associated with distributions of processed tissue are considered to be a single performance obligation. Accordingly, the Upfront Payment and the Annual Exclusivity Fees are deferred as received and are being recognized as other revenues over the term of this distribution agreement based on the expected contractual annual purchase minimums relative to the total contractual minimum purchase requirements in this distribution agreement. Additionally, the Company considered the potential impact of this distribution agreement’s contractual refund provisions and does not expect these provisions to impact future expected revenue related to this distribution agreement. The Company’s aforementioned revenue recognition methods related to the Zimmer distribution agreements do not result in the deferral of revenue less than amounts that would be refundable in the event the agreements were to be terminated in future periods. Additionally, the Company evaluates the appropriateness of the aforementioned revenue recognition methods on an ongoing basis.

Legal Actions

Legal Actions	6 Months Ended
	Jun. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Legal Actions	23. Legal Actions The Company is, from time to time, involved in litigation relating to claims arising out of its operations in the ordinary course of business. The Company believes that none of these claims that were outstanding as of June 30, 2019 , Coloplast — The Company is presently named as co-defendant along with other companies in a small percentage of the transvaginal surgical mesh (“TSM”) mass tort claims being brought in various state and federal courts. The TSM litigation has as its catalyst various Public Health Notifications issued by the FDA with respect to the placement of certain TSM implants that were the subject of 510k regulatory clearance prior to their distribution. The Company does not process or otherwise manufacture for distribution in the U.S. any implants that were the subject of these FDA Public Health Notifications. The Company denies any allegations against it and intends to continue to vigorously defend itself. In addition to claims made directly against the Company, Coloplast, a distributor of TSM’s and certain allografts processed and private labeled for them under a contract with the Company, has also been named as a defendant in individual TSM cases in various federal and state courts. Coloplast requested that the Company indemnify or defend Coloplast in those claims which allege injuries caused by the Company’s allograft implants, and on April 24, 2014, Coloplast sued RTI Surgical, Inc. in the Fourth Judicial District of Minnesota for declaratory relief and breach of contract. On December 11, 2014, Coloplast entered into a settlement agreement with RTI Surgical, Inc. and Tutogen Medical, Inc. (the “Company Parties”) resulting in dismissal of the case. Under the terms of the settlement agreement, the Company Parties are responsible for the defense and indemnification of two categories of present and future claims: (1) tissue only (where Coloplast is solely the distributor of Company processed allograft tissue and no Coloplast-manufactured or distributed synthetic mesh is identified) (“Tissue Only Claims”), and (2) tissue plus non-Coloplast synthetic mesh (“Tissue-Non-Coloplast Claims”) (the Tissue Only Claims and the Tissue-Non-Coloplast Claims being collectively referred to as “Indemnified Claims”). As of June 30, 2019, there are a cumulative total of 1,117 Indemnified Claims for which the Company Parties are providing defense and indemnification. The defense and indemnification of these cases are covered under the Company’s insurance policy subject to a reservation of rights by the insurer. Based on the current information available to the Company, the impact that current or any future TSM litigation may have on the Company cannot be reasonably estimated. LifeNet — On June 27, 2018, LifeNet Health, Inc. (“LifeNet”) filed a patent infringement lawsuit in the United States District Court for the Middle District of Florida (since moved to the Northern District of Florida) claiming infringement of five of its patents by the Company. The suit requests damages, enhanced damages, reimbursement of costs and expenses, reasonable attorney fees, and an injunction. The asserted patents are now expired. On April 7, 2019, the Court granted the Company’s request to stay the lawsuit pending the U.S. Patent Trial and Appeal Board’s (PTAB) decision, expected in the third quarter of 2019, whether to institute review of the patentability of LifeNet’s patents. The Company believes the suit is without merit and will vigorously defend its position. The Company’s accounting policy is to accrue for legal costs as they are incurred.

Regulatory Actions

Regulatory Actions	6 Months Ended
	Jun. 30, 2019
Text Block [Abstract]
Regulatory Actions	24. Regulatory Actions During the third quarter of 2018, the Company decided to stop procurement, manufacturing and distributing its map3® implants effective October 31, 2018. The map3® product has been either sold or destroyed and is off the market. In April 2019, the Company received a letter from the FDA indicating that no further corrective actions are necessary with respect to its previously issued Warning Letter in connection with the map3® product.

Segment Data

Segment Data	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Segment Data	25. Segment Data The Company distributes human tissue, bovine and porcine animal tissue, metal and synthetic implants through various distribution channels. The Company operates in one reportable segment composed of four franchises: spine; sports; OEM and international. Discrete financial information is not available for these four franchises. The following table presents revenues from these four franchises for the three and six months ended June 30, 2019 and 2018: For the Three Months Ended For the Six Months Ended June 30, June 30, 2019 2018 2019 2018 (In thousands) Revenues: Spine $ 26,671 $ 18,934 $ 46,676 $ 38,197 Sports 14,024 14,190 27,803 27,625 OEM 32,483 31,170 61,474 61,290 International 9,129 6,391 16,095 13,463 Total revenues $ 82,307 $ 70,685 $ 152,048 $ 140,575 The following table presents percentage of total revenues derived from the Company’s largest distributors: For the Three Months Ended For the Six Months Ended June 30, June 30, 2019 2018 2019 2018 Percent of revenues derived from: Distributor Zimmer Biomet Holdings, Inc. 17 % 20 % 19 % 21 % Medtronic, PLC 7 % 8 % 8 % 8 % DePuy Synthes 3 % 6 % 4 % 5 % The following table presents property, plant and equipment - net by significant geographic location: June 30, December 31, 2019 2018 Property, plant and equipment - net: Domestic $ 73,580 $ 72,501 International 6,111 5,453 Total $ 79,691 $ 77,954

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	26. Subsequent Events The Company evaluated subsequent events as of the issuance date of the condensed consolidated financial statements as defined by ASC 855 Subsequent Events, and identified no subsequent events that require adjustment to, or disclosure of, in these condensed consolidated financial statements.

Recently Issued and Adopted A_2

Recently Issued and Adopted Accounting Standards (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Changes And Error Corrections [Abstract]
Recently Issued and Adopted Accounting Standards	Recently Issued and Adopted Accounting Standards In February 2016, the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASU”) Leases (Topic 842) “Leases (Topic 840).” Effective January 1, 2019, the Company adopted the new lease accounting standard using the optional transition method which allowed us to continue to apply the guidance under the lease standard in effect at the time in the comparative periods presented. In addition, the Company elected the package of practical expedients, which allowed us to not reassess whether any existing contracts contain a lease, to not reassess historical lease classification as operating or finance leases, and to not reassess initial direct costs. The Company has not elected the practical expedient to use hindsight to determine the lease term for its leases at transition. The Company has also elected the practical expedient allowing us to not separate the lease and non-lease components for all classes of underlying assets. Adoption of this standard resulted in the recording of operating lease ROU assets and corresponding operating lease liabilities of $3,164 and $3,155, respectively, as of January 1, 2019 with no impact on accumulated deficit. Financial position for reporting periods beginning on or after January 1, 2019, are presented under the new guidance, while prior period amounts are not adjusted and continue to be reported in accordance with previous guidance. Note disclosures required in Topic 842 are reported in Note 4, Leases.

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Schedule of Operating Leases	The components of operating lease expense were as follows: For the Three Months Ended For the Six Months Ended June 30, 2019 June 30, 2019 Operating lease cost $ 440 $ 784 Short-term operating lease cost — 36 Total operating lease cost $ 440 $ 820
Schedule of Supplemental Cash Flow Information Related to Leases	Supplemental cash flow information related to operating leases was as follows: For the Three Months Ended For the Six Months Ended June 30, 2019 June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities $ 397 $ 691 ROU assets obtained in exchange for lease obligations — 34
Schedule of Supplemental Balance Sheet Information Related to Leases	Supplemental balance sheet information related to operating leases was as follows: Balance Sheet Classification June 30, 2019 Assets: Right-of-use assets Other assets - net $ 3,546 Liabilities: Current Accrued expenses $ 1,505 Noncurrent Other long-term liabilities 2,117 Total operating lease liabilities $ 3,622
Schedule of Maturities of Operating Lease Liabilities	As of June 30, 2019, maturities of operating lease liabilities were as follows: Maturity of Operating Lease Liabilities June 30, 2019 2019 (remaining) $ 879 2020 1,368 2021 565 2022 224 2023 160 2024 and beyond 875 Total future minimum lease payments 4,071 Less imputed interest (449 ) Total $ 3,622
Future Minimum Lease Commitments Under Non-Cancelable Operating Leases Prior to Adoption of ASC 842	As previously disclosed in our 2018 Annual Report on Form 10-K, which followed the lease accounting prior to adoption of ASC 842, future commitments relating to operating leases for the five years and period thereafter as of December 31, 2018 were as follows: Maturity of Operating Lease Liabilities December 31, 2018 2019 $ 1,374 2020 806 2021 276 2022 162 2023 166 2024 and beyond 882 Total future minimum lease payments $ 3,666

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue From Contract With Customer [Abstract]
Revenue Recognition from Four Categories	The following table presents revenues from these four categories for the three and six months ended June 30, 2019 and 2018: For the Three Months Ended For the Six Months Ended June 30, June 30, 2019 2018 2019 2018 Revenues: Spine $ 26,671 $ 18,934 $ 46,676 $ 38,197 Sports 14,024 14,190 27,803 27,625 OEM 32,483 31,170 61,474 61,290 International 9,129 6,391 16,095 13,463 Total revenues from contracts with customers $ 82,307 $ 70,685 $ 152,048 $ 140,575
Revenue Recognized at a Point in Time and Over Time	The following table presents revenues recognized at a point in time and over time for the three and six months ended June 30, 2019 and 2018: For the Three Months Ended For the Six Months Ended June 30, June 30, 2019 2018 2019 2018 Revenue recognized at a point in time $ 66,469 $ 61,534 $ 119,070 $ 121,697 Revenue recognized over time 15,838 9,151 32,978 18,878 Total revenues from contracts with customers $ 82,307 $ 70,685 $ 152,048 $ 140,575
Contract with Customer, Asset and Liability	The opening and closing balances of the Company’s accounts receivable, contract asset and current and long-term contract liability for the six months ended June 30, 2019 and 2018 are as follows: Contract Contract Liability Accounts Liability (Long- Receivable (Current) Term) Opening 1/1/2019 $ 48,351 $ 5,425 $ 744 Closing 6/30/2019 56,163 5,292 325 Increase/(decrease) 7,812 (133 ) (419 ) Contract Contract Liability Accounts Liability (Long- Receivable (Current) Term) Opening 1/1/2018 $ 39,095 $ 5,978 $ 3,741 Closing 6/30/2018 45,576 6,210 3,155 Increase/(decrease) 6,481 232 (586 )

Acquisition of Paradigm Spine_2

Acquisition of Paradigm Spine, LLC (Tables) - Paradigm Spine [Member]	6 Months Ended
	Jun. 30, 2019
Acquisition Purchase Price	The purchase price was financed as follows: (In thousands) Cash proceeds from second lien credit agreement $ 100,000 Fair market value of securities issued 60,730 Fair market value of contingent earnout 94,976 Total purchase price $ 255,706
Summary of Changes to Fair Value of Acquired Assets and Liabilities	During the three months ended June 30, 2019, the Company made the following changes to the fair values of acquired assets and liabilities as follows: Balance at June 30, 2019 March 31, 2019 Change (In thousands) Cash $ 79 $ 79 $ - Accounts receivable 5,220 5,220 - Inventories 43,084 5,898 37,186 Other current assets 1,693 1,752 (59 ) Property, plant and equipment 379 379 - Current liabilities (6,380 ) (6,169 ) (211 ) Net tangible assets acquired 44,075 7,159 36,916 Goodwill 211,631 248,547 (36,916 ) Total net assets acquired $ 255,706 $ 255,706 $ -
Pro Forma Information of Company's Operations	The following unaudited pro forma information shows the results of the Company’s operations as though the acquisition had occurred as of the beginning of the prior comparable period, January 1, 2018, (in thousands, except per share data): For the Six Months Ended June 30, 2019 2018 Revenues $ 19,074 $ 21,252 Net loss applicable to common shares (10,406 ) (19,169 ) Net loss applicable to common shares excluding acquistion and integration costs (1,219 ) (19,169 )

Acquisition of Zyga Technolog_2

Acquisition of Zyga Technology, Inc (Tables) - Zyga Technology Inc [Member]	6 Months Ended
	Jun. 30, 2019
Acquisition Purchase Price	The purchase price was financed as follows: (In thousands) Cash proceeds from revolving credit facility $ 18,000 Cash from RTI Surgical 3,000 Total purchase price $ 21,000
Summary of Final Allocation of Total Consideration to Tangible and Intangible Assets and Liabilities	The table below represents the final allocation of the total consideration to Zyga’s tangible and intangible assets and liabilities fair values as of January 4, 2018. (In thousands) Inventories $ 1,099 Accounts receivable 573 Other current assets 53 Property, plant and equipment 151 Other assets 26 Deferred tax assets 4,715 Current liabilities (947 ) Acquisition contingencies (4,986 ) Net tangible assets acquired 684 Other intangible assets 6,760 Goodwill 13,556 Total net assets acquired $ 21,000
Pro Forma Information of Company's Operations	The following unaudited pro forma information shows the results of the Company’s operations as though the acquisition had occurred as of the beginning of the prior comparable period, January 1, 2017, (in thousands, except per share data): For the Six Months Ended June 30, 2018 2017 Revenues $ 2,439 $ 2,364 Net loss applicable to common shares (1,053 ) (2,192 )

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2019
Stock Options Outstanding, Exercisable and Available for Grant	The following table summarizes information about stock options outstanding, exercisable and available for grant as of June 30, 2019: Weighted Weighted Average Average Remaining Aggregate Number of Exercise Contractual Intrinsic Shares Price Life (Years) Value Outstanding at January 1, 2019 4,295,744 $ 3.76 Granted 374,224 4.71 Exercised (118,500 ) 3.34 Forfeited or expired (65,304 ) 4.08 Outstanding at June 30, 2019 4,486,164 $ 3.84 5.73 $ 2,467 Vested or expected to vest at June 30, 2019 4,192,575 $ 3.80 5.50 $ 2,442 Exercisable at June 30, 2019 2,499,185 $ 3.65 3.65 $ 1,738 Available for grant at June 30, 2019 4,234,994
Other Information Concerning Stock Options	Other information concerning stock options are as follows: For the Six Months Ended June 30, 2019 2018 Weighted average fair value of stock options granted $ 1.99 $ 2.02 Aggregate intrinsic value of stock options exercised 161 98
Unvested Restricted Stock Awards	The following table summarizes information about unvested restricted stock awards as of June 30, 2019: Weighted Average Number of Grant Date Shares Fair Value Unvested at January 1, 2019 1,075,215 $ 4.29 Granted 625,476 4.85 Vested (385,185 ) 4.17 Forfeited (9,865 ) 4.43 Unvested at June 30, 2019 1,305,641 $ 4.61
Stock-Based Compensation Recognized	For the three and six months ended June 30, 2019 and 2018, the Company recognized stock-based compensation as follows: For the Three Months Ended For the Six Months Ended June 30, June 30, 2019 2018 2019 2018 Stock-based compensation: Costs of processing and distribution $ 36 $ 33 $ 72 $ 66 Marketing, general and administrative 1,216 1,242 2,328 2,474 Research and development 15 15 30 30 Total $ 1,267 $ 1,290 $ 2,430 $ 2,570
Restricted Stock Units [Member]
Unvested Restricted Stock Awards	The following table summarizes information about unvested restricted stock units as of June 30, 2019: Weighted Average Number of Grant Date Shares Fair Value Unvested at January 1, 2019 — $ — Granted 226,352 7.41 Vested — — Forfeited — — Unvested at June 30, 2019 226,352 $ 7.41

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Reconciliation of Common Stock used in Calculation of Basic and Diluted Earnings Per Share	A reconciliation of the number of shares of common stock used in the calculation of basic and diluted net income per common share is presented below: For the Three Months Ended For the Six Months Ended June 30, June 30, 2019 2018 2019 2018 Basic shares 75,144,488 63,405,708 70,409,839 63,400,737 Effect of dilutive securities: Stock options 823,707 — — — Preferred stock Series A 15,152,761 — — — Diluted shares 91,120,956 63,405,708 70,409,839 63,400,737

Inventories (Tables)

Inventories (Tables)	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Components of Inventories	Inventories by stage of completion are as follows: June 30, December 31, 2019 2018 Unprocessed tissue, raw materials and supplies $ 25,014 $ 24,211 Tissue and work in process 30,502 31,796 Implantable tissue and finished goods 58,585 51,464 Purchase price adjustment for finished goods 34,250 - Total 148,351 107,471 Less current portion 127,906 107,471 Long-term portion $ 20,445 $ -

Prepaid and Other Current Ass_2

Prepaid and Other Current Assets (Tables)	6 Months Ended
	Jun. 30, 2019
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Schedule of Prepaid and Other Current Assets	Prepaid and Other Current Assets are as follows: June 30, December 31, 2019 2018 Income tax receivable $ 2,685 $ 3,920 Prepaid expenses 5,275 4,127 Other 773 744 $ 8,733 $ 8,791

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	6 Months Ended
	Jun. 30, 2019
Property Plant And Equipment [Abstract]
Components of Property, Plant and Equipment	Property, plant and equipment are as follows: June 30, December 31, 2019 2018 Land $ 2,020 $ 2,020 Buildings and improvements 58,093 58,093 Processing equipment 44,624 42,599 Surgical instruments 25,829 24,070 Office equipment, furniture and fixtures 1,973 1,877 Computer equipment and software 19,102 18,873 Construction in process 11,593 8,934 163,234 156,466 Less accumulated depreciation (83,543 ) (78,512 ) $ 79,691 $ 77,954

Goodwill (Tables)

Goodwill (Tables)	6 Months Ended
	Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	June 30, December 31, 2019 2018 Balance at January 1 $ 59,798 $ 46,242 Goodwill acquired related to Zyga acquisition — 13,556 Goodwill acquired related to Paradigm acquisition 211,631 — Balance at end of period $ 271,429 $ 59,798

Other Intangible Assets (Tables

Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Components of Other Intangible Assets	Other intangible assets are as follows: June 30, 2019 December 31, 2018 Gross Net Gross Net Carrying Accumulated Carrying Carrying Accumulated Carrying Amount Amortization Amount Amount Amortization Amount Patents $ 16,256 $ 4,727 $ 11,529 $ 16,092 $ 4,194 $ 11,898 Acquired licensing rights 7,528 1,902 5,626 11,852 6,468 5,384 Marketing and procurement and other intangible assets 20,205 12,091 8,114 20,356 11,279 9,077 Total $ 43,989 $ 18,720 $ 25,269 $ 48,300 $ 21,941 $ 26,359
Estimates of Future Amortization Expense	At June 30, 2019, management’s estimates of future amortization expense for the next five years are as follows: Amortization Expense 2019 (remaining) $ 2,100 2020 4,100 2021 4,100 2022 4,100 2023 1,800 2024 1,800

Accrued Expenses (Tables)

Accrued Expenses (Tables)	6 Months Ended
	Jun. 30, 2019
Other Liabilities Disclosure [Abstract]
Accrued Expenses	Accrued expenses are as follows: June 30, December 31, 2019 2018 Accrued compensation $ 6,175 $ 8,678 Accrued severance and restructuring costs 758 931 Accrued executive transition costs — 43 Accrued distributor commissions 3,825 3,907 Accrued donor recovery fees 4,692 4,088 Other 9,218 7,036 $ 24,668 $ 24,683

Short and Long-Term Obligatio_2

Short and Long-Term Obligations (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Short and Long-Term Obligations	Short and long-term obligations are as follows: June 30, December 31, 2019 2018 Ares Term loan $ 101,473 $ — JPM facility 65,000 50,000 Less unamortized debt issuance costs (1,392 ) (927 ) Total 165,081 49,073 Less current portion — — Long-term portion $ 165,081 $ 49,073

Other long-term liabilities (Ta

Other long-term liabilities (Tables)	6 Months Ended
	Jun. 30, 2019
Text Block [Abstract]
Summary of Other long-term liabilities	Other long-term liabilities are as follows: June 30, December 31, 2019 2018 Acquisition contingencies $ 98,372 $ 4,986 Other 2,562 633 $ 100,934 $ 5,619

Preferred Stock (Tables)

Preferred Stock (Tables)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Schedule of Preferred Stock	Preferred stock is as follows: Preferred Stock Liquidation Preferred Stock Issuance Net Value Costs Total Balance at January 1, 2019 $ 66,519 $ (293 ) $ 66,226 Accrued dividend payable — — — Amortization of preferred stock issuance costs — 92 92 Balance at June 30, 2019 $ 66,519 $ (201 ) $ 66,318

Severance and Restructuring C_2

Severance and Restructuring Costs (Tables)	6 Months Ended
	Jun. 30, 2019
Employee Severance [Member]
Schedule of Restructuring Charges	The following table includes a roll-forward of severance and restructuring costs included in accrued expenses, see Note 15. Accrued severance and restructuring costs at January 1, 2019 $ 931 Severance and restructuring costs accrued in 2019 896 Subtotal severance and restructuring costs 1,827 Severance and restructuring related cash payments (1,069 ) Accrued severance and restructuring charges at June 30, 2019 $ 758

Executive Transition Costs (Tab

Executive Transition Costs (Tables)	6 Months Ended
	Jun. 30, 2019
Former Chief Executive Officer [Member]
Schedule of Restructuring Charges	The following table includes a roll-forward of executive transition costs included in accrued expenses, see Note 15. Accrued executive transition costs at January 1, 2019 $ 43 Cash payments (43 ) Accrued executive transition costs at June 30, 2019 $ -

Segment Data (Tables)

Segment Data (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Revenues from Tissue Distribution and Other Revenues	The following table presents revenues from these four franchises for the three and six months ended June 30, 2019 and 2018: For the Three Months Ended For the Six Months Ended June 30, June 30, 2019 2018 2019 2018 (In thousands) Revenues: Spine $ 26,671 $ 18,934 $ 46,676 $ 38,197 Sports 14,024 14,190 27,803 27,625 OEM 32,483 31,170 61,474 61,290 International 9,129 6,391 16,095 13,463 Total revenues $ 82,307 $ 70,685 $ 152,048 $ 140,575
Schedule of Percentage of Total Revenues Derived from Company's Largest Distributors	The following table presents percentage of total revenues derived from the Company’s largest distributors: For the Three Months Ended For the Six Months Ended June 30, June 30, 2019 2018 2019 2018 Percent of revenues derived from: Distributor Zimmer Biomet Holdings, Inc. 17 % 20 % 19 % 21 % Medtronic, PLC 7 % 8 % 8 % 8 % DePuy Synthes 3 % 6 % 4 % 5 %
Schedule of Property, Plant and Equipment - Net by Significant Geographic Location	The following table presents property, plant and equipment - net by significant geographic location: June 30, December 31, 2019 2018 Property, plant and equipment - net: Domestic $ 73,580 $ 72,501 International 6,111 5,453 Total $ 79,691 $ 77,954

Operations and Organization - A

Operations and Organization - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2019Country
Minimum [Member]
Operations And Organization [Line Items]
Number of countries that receive distribution	50

Recently Issued and Adopted A_3

Recently Issued and Adopted Accounting Standards - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Operating lease, right-of-use asset		$ 3,164
Operating lease, liability	$ 3,622	$ 3,155
Maximum [Member]
Lease term	12 months

Leases - Additional Information

Leases - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2019USD ($)
Operating lease, description	The Company’s operating leases do not have any residual value guarantees, restrictions or covenants.
Lessee, operating lease, existence of residual value guarantees, restrictions or covenants	false
Lease not yet commenced, description	The Company does not have any leases that have not yet commenced as of June 30, 2019.
Operating lease remaining term	4 years 7 months 6 days
Lease not yet commenced, option to extend	The option to extend is only included in the lease term if the Company is reasonably certain of exercising that option.
Variable lease, costs	$ 0
Weighted-average discount rate, operating leases	4.70%
Minimum [Member]
Operating lease remaining term	1 year
Maximum [Member]
Operating lease remaining term	14 years

Leases - Schedule of Operating

Leases - Schedule of Operating Leases (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 440	$ 784
Short-term operating lease cost		36
Total operating lease cost	$ 440	$ 820

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities	$ 397	$ 691
ROU assets obtained in exchange for lease obligations		$ 34

Leases - Schedule of Suppleme_2

Leases - Schedule of Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Right-of-use assets		$ 3,164
Total operating lease liabilities	$ 3,622	$ 3,155
Other Assets [Member]
Right-of-use assets	3,546
Accrued Expenses [Member]
Current	1,505
Other Long Term Liabilities [Member]
Noncurrent	$ 2,117

Leases - Schedule of Maturities

Leases - Schedule of Maturities of Operating Lease Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Leases [Abstract]
2019 (remaining)	$ 879
2020	1,368
2021	565
2022	224
2023	160
2024 and beyond	875
Total future minimum lease payments	4,071
Less imputed interest	(449)
Total	$ 3,622	$ 3,155

Leases - Future Minimum Lease C

Leases - Future Minimum Lease Commitments Under Non-Cancelable Operating Leases Prior to Adoption of ASC 842 (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2019	$ 1,374
2020	806
2021	276
2022	162
2023	166
2024 and beyond	882
Total future minimum lease payments	$ 3,666

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)SegmentBusinessUnit	Jun. 30, 2018USD ($)
Revenue From Contract With Customer [Abstract]
Number of reportable segment | Segment	1
Number of business lines | BusinessUnit	4
Revenue recognized from amounts included in contract liabilities | $	$ 2,584	$ 2,434

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Revenue Recognition from Four Franchises (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	$ 82,307	$ 70,685	$ 152,048	$ 140,575
Spine [Member] | Tissue Distribution [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	26,671	18,934	46,676	38,197
Sports [Member] | Tissue Distribution [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	14,024	14,190	27,803	27,625
OEM [Member] | Tissue Distribution [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	32,483	31,170	61,474	61,290
International [Member] | Tissue Distribution [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	$ 9,129	$ 6,391	$ 16,095	$ 13,463

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Revenues Recognized at a Point in Time and Over Time (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	$ 82,307	$ 70,685	$ 152,048	$ 140,575
Transferred at Point in Time [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	66,469	61,534	119,070	121,697
Transferred over Time [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	$ 15,838	$ 9,151	$ 32,978	$ 18,878

Revenue from Contracts with C_6

Revenue from Contracts with Customers - Contract with Customer, Asset and Liability (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018
Revenue From Contract With Customer [Abstract]
Accounts Receivable	$ 56,163	$ 45,576	$ 48,351	$ 48,351	$ 39,095
Contract Liability (Current)	5,292	6,210	5,425		5,978
Contract Liability (Long- Term)	325	3,155	$ 744		$ 3,741
Accounts Receivable, Increase/(decrease)	7,812	6,481
Contract Liability (Current), Increase/(decrease)	(133)	232
Contract Liability (Long-Term), Increase/(decrease)	$ (419)	$ (586)

Acquisition of Paradigm Spine_3

Acquisition of Paradigm Spine, LLC - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Mar. 08, 2019	Dec. 31, 2018	Mar. 31, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Dec. 31, 2017
Business Combinations [Line Items]
Common stock par value		$ 0.001		$ 0.001		$ 0.001
Severance expenses					$ 884
Goodwill		$ 59,798		$ 271,429		$ 271,429	$ 46,242
Paradigm Spine [Member]
Business Combinations [Line Items]
Potential debt to finance business combination	$ 100,000
Number of common stock to be issued at closing, shares	10,729,614
Number of common stock to be issued at closing, value	$ 50,000
Cash consideration threshold working capital amount	7,000
Potential debt to finance business combination	100,000
Contingent liability	94,976
Acquisition and integration expenses		$ 4,143		10,910		15,053
Business development expenses				462
Severance expenses				896
Inventory fair value, current	19,703
Inventory fair value, noncurrent	23,381
Costs of processing and distribution				2,936
Business acquisition costs of processing and distribution related to inventory			$ 477
Goodwill	211,631		$ 248,547	211,631		$ 211,631
Revenue				12,096
Net loss				490
Proforma net loss exclude acquisition and integration related costs, net of tax				10,910
Business acquisition integration related costs tax				$ 1,723
Paradigm Spine [Member] | Maximum [Member]
Business Combinations [Line Items]
Number of common stock to be issued at closing, value	$ 50,000
Master Transaction Agreement [Member]
Business Combinations [Line Items]
Common stock par value	$ 0.001
Master Transaction Agreement [Member] | Series A Preferred Stock [Member]
Business Combinations [Line Items]
Common stock par value	0.001
Master Transaction Agreement [Member] | One Fully Paid and Nonassessable [Member]
Business Combinations [Line Items]
Common stock par value	0.001
Master Transaction Agreement [Member] | One Fully Paid and Nonassessable [Member] | Series A Preferred Stock [Member]
Business Combinations [Line Items]
Common stock par value	$ 0.001

Acquisition of Paradigm Spine_4

Acquisition of Paradigm Spine, LLC - Acquisition Purchase Price (Detail) - USD ($) $ in Thousands	Mar. 08, 2019	Jun. 30, 2019	Jun. 30, 2018
Business Combinations [Line Items]
Cash proceeds from second lien credit agreement		$ 115,000	$ 74,425
Paradigm Spine [Member]
Business Combinations [Line Items]
Cash proceeds from second lien credit agreement	$ 100,000
Fair market value of securities issued	60,730
Fair market value of contingent earnout	94,976
Total purchase price	$ 255,706	$ 99,921

Acquisition of Paradigm Spine_5

Acquisition of Paradigm Spine, LLC - Summary of Changes to Fair Value of Acquired Assets and Liabilities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Mar. 08, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Combinations [Line Items]
Goodwill	$ 271,429			$ 59,798	$ 46,242
Paradigm Spine [Member]
Business Combinations [Line Items]
Cash	79	$ 79
Accounts receivable	5,220	5,220
Inventories	43,084	5,898
Other current assets	1,693	1,752
Property, plant and equipment	379	379
Current liabilities	(6,380)	(6,169)
Net tangible assets acquired	44,075	7,159
Goodwill	211,631	248,547	$ 211,631
Total net assets acquired	255,706	$ 255,706
Change, Inventories	37,186
Change, Other current assets	(59)
Change, Current liabilities	(211)
Change, Net tangible assets acquired	36,916
Change, Goodwill	$ (36,916)

Acquisition of Paradigm Spine_6

Acquisition of Paradigm Spine, LLC. - Pro Forma Information of Company's Operations (Detail) - Paradigm Spine [Member] - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Business Acquisition Pro Forma Information [Line Items]
Revenues	$ 19,074	$ 21,252
Net loss applicable to common shares	(10,406)	(19,169)
Net loss applicable to common shares excluding acquistion and integration costs	$ (1,219)	$ (19,169)

Acquisition of Zyga Technology

Acquisition of Zyga Technology Inc. - Additional Information (Detail) - USD ($) $ in Thousands	Jan. 04, 2018	Jun. 30, 2019	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2018
Business Combinations [Line Items]
Acquisition and integration expenses		$ 1,953		$ 10,910	$ 800
Goodwill		271,429		271,429		$ 46,242	$ 59,798
Zyga Technology Inc [Member]
Business Combinations [Line Items]
Date of merger agreement	Jan. 4, 2018
Payments to acquire businesses	$ 21,000
Cash from RTI Surgical	3,000				$ 21,000
Acquisition related costs	1,430
Acquisition and integration expenses			$ 800			$ 630
Goodwill	13,556
Zyga Technology Inc [Member] | Patents [Member]
Business Combinations [Line Items]
Other intangible assets	$ 6,500
Other intangible assets, useful life	13 years
Zyga Technology Inc [Member] | Trademarks [Member]
Business Combinations [Line Items]
Other intangible assets	$ 80
Other intangible assets, useful life	1 year
Zyga Technology Inc [Member] | Marketing-Related Intangible Assets [Member]
Business Combinations [Line Items]
Other intangible assets	$ 180
Other intangible assets, useful life	7 years
Zyga Technology Inc [Member] | Revolving Credit Facility [Member]
Business Combinations [Line Items]
Cash proceeds from revolving credit facility	$ 18,000
Zyga Technology Inc [Member] | Clinical Milestones [Member]
Business Combinations [Line Items]
Earnout consideration	1,000	4,986		4,986
Zyga Technology Inc [Member] | Earn Out Payment [Member]
Business Combinations [Line Items]
Revenue based earnout consideration	$ 35,000	$ 4,986		$ 4,986

Acquisition of Zyga Technolog_3

Acquisition of Zyga Technology Inc. - Acquisition Purchase Price (Detail) - Zyga Technology Inc [Member] - USD ($) $ in Thousands	Jan. 04, 2018	Jun. 30, 2018
Business Combinations [Line Items]
Cash from RTI Surgical	$ 3,000	$ 21,000
Total purchase price	21,000
Revolving Credit Facility [Member]
Business Combinations [Line Items]
Cash proceeds from revolving credit facility	$ 18,000

Acquisition of Zyga Technolog_4

Acquisition of Zyga Technology Inc. - Summary of Final Allocation of Total Consideration to Tangible and Intangible Assets and Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jan. 04, 2018	Dec. 31, 2017
Business Combinations [Line Items]
Acquisition contingencies	$ (98,372)	$ (4,986)
Goodwill	271,429	59,798		$ 46,242
Zyga Technology Inc [Member]
Business Combinations [Line Items]
Inventories			$ 1,099
Accounts receivable			573
Other current assets			53
Property, plant and equipment			151
Other assets			26
Deferred tax assets			4,715
Current liabilities			(947)
Acquisition contingencies	$ (98,372)	$ (4,986)	(4,986)
Net tangible assets acquired			684
Other intangible assets			6,760
Goodwill			13,556
Total net assets acquired			$ 21,000

Acquisition of Zyga Technolog_5

Acquisition of Zyga Technology, Inc. - Pro Forma Information of Company's Operations (Detail) - Zyga Technology Inc [Member] - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Business Acquisitions Pro Forma Infomation [Line Items]
Revenues	$ 2,439	$ 2,364
Net loss applicable to common shares	$ (1,053)	$ (2,192)

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of market value of common stock, stock options exercise price	100.00%
Percentage of market value of common stock, restricted stock award granted	100.00%
Total unrecognized stock-based compensation	$ 3,561
Stock-based compensation awards, weighted-average period recognized	1 year 10 months 13 days
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term of stock options granted	5 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term of stock options granted	10 years
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized stock-based compensation	$ 1,792
Stock-based compensation awards, weighted-average period recognized	2 years 3 months
Stock Option [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation award, vesting period	1 year
Stock Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation award, vesting period	5 years
Restricted Stock Awards [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation award, vesting period	1 year
Restricted Stock Awards [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation award, vesting period	3 years
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized stock-based compensation	$ 1,198
Stock-based compensation awards, weighted-average period recognized	2 years 6 months
2018 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock allowed to be issued | shares	5,726,035

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Options Outstanding, Exercisable and Available for Grant (Detail) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)$ / sharesshares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding, Number of Shares	4,295,744
Granted, Number of Shares	374,224
Exercised, Number of Shares	(118,500)
Forfeited or expired, Number of Shares	(65,304)
Outstanding, Number of Shares	4,486,164
Vested or expected to vest, Number of Shares	4,192,575
Exercisable, Number of Shares	2,499,185
Available for grant, Number of Shares	4,234,994
Outstanding, Weighted Average Exercise Price | $ / shares	$ 3.76
Granted, Weighted Average Exercise Price | $ / shares	4.71
Exercised, Weighted Average Exercise Price | $ / shares	3.34
Forfeited or expired, Weighted Average Exercise Price | $ / shares	4.08
Outstanding, Weighted Average Exercise Price | $ / shares	3.84
Vested or expected to vest, Weighted Average Exercise Price | $ / shares	3.80
Exercisable, Weighted Average Exercise Price | $ / shares	$ 3.65
Outstanding, Weighted Average Remaining Contractual Life (Years)	5 years 8 months 23 days
Vested or expected to vest, Weighted Average Remaining Contractual Life (Years)	5 years 6 months
Exercisable, Weighted Average Remaining Contractual Life (Years)	3 years 7 months 24 days
Outstanding, Aggregate Intrinsic Value | $	$ 2,467
Vested or expected to vest, Aggregate Intrinsic Value | $	2,442
Exercisable, Aggregate Intrinsic Value | $	$ 1,738

Stock-Based Compensation - Othe

Stock-Based Compensation - Other Information Concerning Stock Options (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Weighted average fair value of stock options granted	$ 1.99	$ 2.02
Aggregate intrinsic value of stock options exercised	$ 161	$ 98

Stock-Based Compensation - Unve

Stock-Based Compensation - Unvested Restricted Stock Awards (Detail)	6 Months Ended
	Jun. 30, 2019$ / sharesshares
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Number of shares | shares	1,075,215
Granted, Number of shares | shares	625,476
Vested, Number of shares | shares	(385,185)
Forfeited, Number of shares | shares	(9,865)
Ending Balance, Number of shares | shares	1,305,641
Beginning Balance, Weighted Average Grant Date Fair Value | $ / shares	$ 4.29
Granted, Weighted Average Grant Date Fair Value | $ / shares	4.85
Vested, Weighted Average Grant Date Fair Value | $ / shares	4.17
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	4.43
Ending Balance, Weighted Average Grant Date Fair Value | $ / shares	$ 4.61
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Number of shares | shares	226,352
Forfeited, Number of shares | shares	0
Ending Balance, Number of shares | shares	226,352
Granted, Weighted Average Grant Date Fair Value | $ / shares	$ 7.41
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	0
Ending Balance, Weighted Average Grant Date Fair Value | $ / shares	$ 7.41

Stock-Based Compensation - St_2

Stock-Based Compensation - Stock-Based Compensation Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation	$ 1,267	$ 1,290	$ 2,430	$ 2,570
Costs of Processing and Distribution [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation	36	33	72	66
Marketing General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation	1,216	1,242	2,328	2,474
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation	$ 15	$ 15	$ 30	$ 30

Net Income Per Common Share - R

Net Income Per Common Share - Reconciliation of Common Stock Used in Calculation of Basic and Diluted Earnings Per Share (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Basic shares	75,144,488	63,405,708	70,409,839	63,400,737
Effect of dilutive securities: Stock options	823,707
Preferred stock Series A	15,152,761
Diluted shares	91,120,956	63,405,708	70,409,839	63,400,737

Net Income Per Common Share - A

Net Income Per Common Share - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options to purchase common stock included in computation of diluted income per share	823,707
Potential Dilutive Securities included in computation of diluted EPS	15,152,761
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential Dilutive Securities included in computation of diluted EPS	50,000	50,000	50,000	50,000
Convertible Common Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential Dilutive Securities included in computation of diluted EPS	15,152,761
Common Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive stock excluded from the computation of diluted EPS		659,785	808,904	618,776
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive stock excluded from the computation of diluted EPS	1,537,678	1,590,662	1,429,442	1,447,911

Inventories - Components of Inv

Inventories - Components of Inventories (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Unprocessed tissue, raw materials and supplies	$ 25,014	$ 24,211
Tissue and work in process	30,502	31,796
Implantable tissue and finished goods	58,585	51,464
Purchase price adjustment for finished goods	34,250
Total	148,351	107,471
Inventories - net	127,906	$ 107,471
Long-term portion	$ 20,445

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Inventory [Line Items]
Provision for inventory write-downs	$ 1,744	$ 8,224		$ 3,274	$ 10,865
Product obsolescence			$ 1,023
Map3® Implant [Member]
Inventory [Line Items]
Provision for inventory write-downs		$ 6,559
Paradigm Spine [Member]
Inventory [Line Items]
Long-term portion of inventory relating to acquisition	$ 37,186
Paradigm Spine [Member] | Finished Goods [Member]
Inventory [Line Items]
Long-term portion of inventory relating to acquisition				1,608
Paradigm Spine [Member] | Purchase Price Adjustment [Member]
Inventory [Line Items]
Long-term portion of inventory relating to acquisition				$ 18,837

Prepaid and Other Current Ass_3

Prepaid and Other Current Assets - Schedule of Prepaid and Other Current Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Income tax receivable	$ 2,685	$ 3,920
Prepaid expenses	5,275	4,127
Other	773	744
Prepaid and other current assets	$ 8,733	$ 8,791

Property, Plant and Equipment -

Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 163,234	$ 156,466
Less accumulated depreciation	(83,543)	(78,512)
Property, plant and equipment, net	79,691	77,954
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,020	2,020
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	58,093	58,093
Processing Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	44,624	42,599
Surgical Instruments [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	25,829	24,070
Office Equipment Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,973	1,877
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	19,102	18,873
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 11,593	$ 8,934

Property, Plant and Equipment_2

Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Property, Plant and Equipment [Line Items]
Depreciation expense in connection with property, plant and equipment	$ 2,800	$ 2,524	$ 5,539	$ 5,147
Asset impairment and abandonments		4,515	$ 15	$ 4,644
Map3® Implant [Member]
Property, Plant and Equipment [Line Items]
Asset impairment and abandonments		$ 1,797

Goodwill - Schedule of Goodwill

Goodwill - Schedule of Goodwill (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Goodwill [Line Items]
Beginning Balance	$ 59,798	$ 46,242
Ending Balance	271,429	59,798
Zyga Technology Inc [Member]
Goodwill [Line Items]
Goodwill acquired		$ 13,556
Paradigm Spine [Member]
Goodwill [Line Items]
Goodwill acquired	211,631
Ending Balance	$ 211,631

Other Intangible Assets - Compo

Other Intangible Assets - Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 43,989	$ 48,300
Accumulated Amortization	18,720	21,941
Net Carrying Amount	25,269	26,359
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,256	16,092
Accumulated Amortization	4,727	4,194
Net Carrying Amount	11,529	11,898
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,528	11,852
Accumulated Amortization	1,902	6,468
Net Carrying Amount	5,626	5,384
Marketing and Procurement and Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	20,205	20,356
Accumulated Amortization	12,091	11,279
Net Carrying Amount	$ 8,114	$ 9,077

Other Intangible Assets - Addit

Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization expense of other intangible assets	$ 995	$ 960	$ 1,952	$ 1,921
Map3® Implant [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment and abandonment charges		$ 2,718

Other Intangible Assets - Estim

Other Intangible Assets - Estimates of Future Amortization Expense (Detail) $ in Thousands	Jun. 30, 2019USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
2019 (remaining)	$ 2,100
2020	4,100
2021	4,100
2022	4,100
2023	1,800
2024	$ 1,800

Accrued Expenses - Accrued Expe

Accrued Expenses - Accrued Expenses (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Payables And Accruals [Abstract]
Accrued compensation	$ 6,175	$ 8,678
Accrued severance and restructuring costs	758	931
Accrued executive transition costs		43
Accrued distributor commissions	3,825	3,907
Accrued donor recovery fees	4,692	4,088
Other	9,218	7,036
Total accrued expenses	$ 24,668	$ 24,683

Short and Long-Term Obligatio_3

Short and Long-Term Obligations - Short and Long-Term Obligations (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Ares Term loan	$ 101,473	$ 0
JPM facility	65,000	50,000
Less unamortized debt issuance costs	(1,392)	(927)
Debt and capital lease obligation, total	165,081	49,073
Less current portion	0	0
Long-term portion	$ 165,081	$ 49,073

Short and Long-Term Obligatio_4

Short and Long-Term Obligations - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 08, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2021	Jun. 05, 2018
Line of Credit Facility [Line Items]
Debt instrument, maturity date		Jun. 5, 2023
Amortization of debt issuance cost		$ 219
Debt issuance cost		$ 826
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, variable interest rate		4.19%
Line of credit outstanding amount		$ 65,000
Line of credit remaining borrowing capacity		10,000
Amortization of debt issuance cost		$ 361	$ 423
Ares Term Loans [Member]
Line of Credit Facility [Line Items]
Debt instrument, maturity date		Dec. 5, 2023
Interest rate on term loan		11.16%
2018 Loan Agreement [Member]
Line of Credit Facility [Line Items]
Percentage of foreign subsidiaries stock held as collateral					65.00%
Credit facility guaranteed description		The JPM Facility is guaranteed by the Company’s domestic subsidiaries and is secured by: (i) substantially all of the assets of the Company and Pioneer Surgical; (ii) substantially all of the assets of each of the Company’s domestic subsidiaries; and (iii) 65% of the stock of the Company’s foreign subsidiaries.
Minimum fixed charge coverage ratio					0.01
Covenant Terms of Credit Facility		The Company is required to maintain a minimum fixed charge coverage ratio of at least 1.00:1.00 (the “JPM Required Minimum Fixed Charge Coverage Ratio”) during either of the following periods (each, a “JPM Covenant Testing Period”): (i) a period beginning on a date that a default has occurred and is continuing under the loan documents entered into by the Company in conjunction with the 2018 Credit Agreement through the first date on which no default has occurred and is continuing; or (ii) a period beginning on a date that availability under the JPM Facility is less than the specified covenant testing threshold and continuing until availability under the JPM Facility is greater than or equal to the specified covenant testing threshold for thirty (30) consecutive days.
2018 Loan Agreement [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, original borrowing capacity	$ 100,000				$ 100,000
Revolving line of credit commitment reduction amount	75,000
2018 Loan Agreement [Member] | Revolving Credit Facility [Member] | Debt Instrument Variable Rate Base CBFR Using Monthly REVLIBOR30 Rate [Member]
Line of Credit Facility [Line Items]
Credit facility, variable interest rate					2.00%
2018 Loan Agreement [Member] | Revolving Credit Facility [Member] | Debt Instrument Variable Rate Base Eurodollars Adjusted LIBO Rate [Member]
Line of Credit Facility [Line Items]
Credit facility, variable interest rate					2.00%
2018 Loan Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Credit facility, additional borrowing capacity					$ 50,000
2019 Loan Agreement [Member]
Line of Credit Facility [Line Items]
Minimum leverage ratio		4.50%
Increase in term loan interest rate		0.75%
Paid in kind option to pay interest		50.00%
2019 Loan Agreement [Member] | Base Rate [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate		7.50%
2019 Loan Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate		8.50%
2019 Loan Agreement [Member] | Ares Term Loans [Member]
Line of Credit Facility [Line Items]
Credit facility, original borrowing capacity	$ 100,000
Percentage of foreign subsidiaries stock held as collateral					65.00%
Covenant Terms of Credit Facility		During any period beginning on a date that either: (i) a default has occurred and is continuing under the loan documents entered into by Legacy RTI in conjunction with the Credit Agreement (the “Ares Loan Documents”); or (ii) availability under the Ares Term Loan is less than the specified covenant testing threshold, and continuing until either (a) no default has occurred and is continuing under the Ares Loan Documents or (b) availability under the Ares Term Loan is greater than or equal to the specified covenant testing threshold for thirty (30) consecutive days,
Term loan guaranteed description		The Ares Term Loan is guaranteed by the Company and each of the Company’s domestic subsidiaries and is secured by: (i) substantially all of the assets of Legacy RTI; (ii) substantially all of the assets of the Company; (iii) substantially all of the assets of the Company’s domestic subsidiaries; and (iv) 65% of the stock of the Company’s foreign subsidiaries.
Minimum fixed charge coverage ratio		91.00%
Net leverage ratio		900.00%
2019 Loan Agreement [Member] | Ares Term Loans [Member] | Scenario, Forecast [Member]
Line of Credit Facility [Line Items]
Net leverage ratio				350.00%

Other Long-Term Liabilities - S

Other Long-Term Liabilities - Summary of Other Long-term Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jan. 04, 2018
Acquisition contingencies	$ 98,372	$ 4,986
Other	2,562	633
Total other long-term liabilities	100,934	5,619
Zyga Technology Inc [Member]
Acquisition contingencies	$ 98,372	$ 4,986	$ 4,986

Other Long Term Liabilities - A

Other Long Term Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Mar. 08, 2019	Jan. 04, 2018
Zyga Technology Inc [Member] | Clinical and Revenue Milestones Earnout Payment [Member]
Restructuring Cost and Reserve [Line Items]
Revenue earnout contingencies	$ 3,396		$ 3,396
Zyga Technology Inc [Member] | Earn Out Payment [Member]
Restructuring Cost and Reserve [Line Items]
Reduction in contingent liability	1,590
Paradigm Spine [Member]
Restructuring Cost and Reserve [Line Items]
Revenue earnout contingencies		$ 94,976
Paradigm Spine [Member] | Earn Out Payment [Member]
Restructuring Cost and Reserve [Line Items]
Revenue earnout contingencies	$ 94,976

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Income Tax Disclosure [Abstract]
Deferred tax assets	$ 19,715
Domestic deferred tax assets, valuation allowances	$ 3,076
Primary measure of cumulative losses, number of rolling years	3 years

Preferred Stock - Additional In

Preferred Stock - Additional Information (Detail) - USD ($) $ in Thousands	Jul. 16, 2013	Jun. 12, 2013	Jun. 30, 2019	Dec. 31, 2018
Series A Preferred Stock [Member]
Temporary Equity [Line Items]
Preferred stock issuance cost			$ (201)	$ (293)
Private Placement [Member] | Convertible Preferred Stock [Member]
Temporary Equity [Line Items]
Convertible preferred stock issued		$ 50,000
Preferred stock issuance cost	$ 1,290
Private Placement [Member] | Series A Preferred Stock [Member]
Temporary Equity [Line Items]
Preferred stock dividend rate	6.00%

Preferred Stock - Schedule of P

Preferred Stock - Schedule of Preferred Stock (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Temporary Equity [Line Items]
Net Total	$ 66,318	$ 66,226
Accrued dividend payable	0
Amortization of preferred stock issuance costs	92
Series A Preferred Stock [Member]
Temporary Equity [Line Items]
Net Total	66,519	66,519
Accrued dividend payable	0
Amortization of preferred stock issuance costs	92
Preferred stock issuance cost	$ (201)	$ (293)

Severance and Restructuring C_3

Severance and Restructuring Costs - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Severance and restructuring costs		$ 2,280
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring costs	$ 896
Paradigm Spine [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance and restructuring costs	$ 896

Severance and Restructuring C_4

Severance and Restructuring Costs - Schedule of Restructuring Charges (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Accrued severance and restructuring charges, beginning balance	$ 931
Severance and restructuring costs accrued in 2019		$ 2,280
Accrued severance and restructuring charges, ending balance	758	931
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Accrued severance and restructuring charges, beginning balance	931
Severance and restructuring costs accrued in 2019	896
Subtotal severance and restructuring costs	1,827
Severance and restructuring related cash payments	(1,069)
Accrued severance and restructuring charges, ending balance	$ 758	$ 931

Executive Transition Costs - Ad

Executive Transition Costs - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)
Former Chief Executive Officer [Member]
Postemployment Benefits Disclosure [Line Items]
Executive transition costs	$ 4,404

Executive Transition Costs - Sc

Executive Transition Costs - Schedule of Restructuring Charges (Detail) - Chief Executive Officer and Chief Financial and Administrative Officer [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Restructuring Cost and Reserve [Line Items]
Accrued executive transition costs at January 1, 2019	$ 43
Cash payments	$ (43)

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 08, 2019	Jan. 04, 2018	Oct. 12, 2013	Sep. 30, 2010	Jun. 30, 2019	Jun. 30, 2018
Medtronic [Member]
Commitment And Contingencies [Line Items]
Decline in cumulative fees received, trailing period			12 months
Distribution agreement automatic renewal term			5 years
Period prior to expiration of initial term for notice			1 year
Zimmer [Member]
Commitment And Contingencies [Line Items]
Initial agreement term				10 years
Upfront payment				$ 13,000
Upfront payment period				10 days
Paradigm Spine [Member]
Commitment And Contingencies [Line Items]
Agreement to acquire business	$ 300,000
Cash to be paid at closing	150,000
Potential debt to finance business combination	$ 100,000
Number of common stock to be issued at closing, shares	10,729,614
Number of common stock to be issued at closing, value	$ 50,000
Revenue based earnout considerations	94,976
Cash from RTI Surgical	255,706				$ 99,921
Earnout consideration	94,976
Paradigm Spine [Member] | Earn Out Payment [Member]
Commitment And Contingencies [Line Items]
Earnout consideration					94,976
Paradigm Spine [Member] | Maximum [Member]
Commitment And Contingencies [Line Items]
Revenue based earnout considerations	$ 150,000
Zyga Technology Inc [Member]
Commitment And Contingencies [Line Items]
Date of merger agreement		Jan. 4, 2018
Payments to acquire businesses		$ 21,000
Cash from RTI Surgical		3,000				$ 21,000
Zyga Technology Inc [Member] | Clinical Milestones [Member]
Commitment And Contingencies [Line Items]
Earnout consideration		1,000			4,986
Zyga Technology Inc [Member] | Earn Out Payment [Member]
Commitment And Contingencies [Line Items]
Revenue based earnout consideration		35,000			4,986
Zyga Technology Inc [Member] | Clinical and Revenue Milestones Earnout Payment [Member]
Commitment And Contingencies [Line Items]
Earnout consideration		3,396			$ 3,396
Zyga Technology Inc [Member] | Revolving Credit Facility [Member]
Commitment And Contingencies [Line Items]
Cash proceeds from credit facility		$ 18,000

Legal Actions - Additional Info

Legal Actions - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2019LitigationClaim
Commitments And Contingencies Disclosure [Abstract]
Outstanding claims | Litigation	0
Claims for which the Company Parties are providing defense and indemnification | Claim	1,117

Segment Data - Additional Infor

Segment Data - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2019Segment
Segment Reporting [Abstract]
Number of reportable segment	1
Lines of business	4

Segment Data - Revenues from Ti

Segment Data - Revenues from Tissue Distribution and Other Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Total revenues	$ 82,307	$ 70,685	$ 152,048	$ 140,575
Spine [Member] | Tissue Distribution [Member]
Segment Reporting Information [Line Items]
Total revenues	26,671	18,934	46,676	38,197
Sports [Member] | Tissue Distribution [Member]
Segment Reporting Information [Line Items]
Total revenues	14,024	14,190	27,803	27,625
OEM [Member] | Tissue Distribution [Member]
Segment Reporting Information [Line Items]
Total revenues	32,483	31,170	61,474	61,290
International [Member] | Tissue Distribution [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 9,129	$ 6,391	$ 16,095	$ 13,463

Segment Data - Schedule of Perc

Segment Data - Schedule of Percentage of Total Revenues Derived from Company's Largest Distributors (Detail) - Distributors Concentration Risk [Member] - Sales Revenue, Net [Member]	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Zimmer [Member]
Concentration Risk [Line Items]
Percentage of sales revenue	17.00%	20.00%	19.00%	21.00%
Medtronic [Member]
Concentration Risk [Line Items]
Percentage of sales revenue	7.00%	8.00%	8.00%	8.00%
DePuy Synthes [Member]
Concentration Risk [Line Items]
Percentage of sales revenue	3.00%	6.00%	4.00%	5.00%

Segment Data - Schedule of Prop

Segment Data - Schedule of Property, Plant and Equipment - Net by Significant Geographic Location (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment - net	$ 79,691	$ 77,954
Domestic [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - net	73,580	72,501
International [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment - net	$ 6,111	$ 5,453