Significant Accounting Policies - (Policies)	12 Months Ended
Dec. 31, 2014
Accounting Policies [Abstract]
Reclassifications	Reclassifications Certain reclassifications have been made to prior periods’ consolidated financial statements to conform to the current period presentation. These reclassifications did not result in any change in previously reported net loss, total assets or stockholders’ deficit.
Principles of Consolidation	Principles of Consolidation The accompanying consolidated financial statements include the results of Holding and its subsidiaries, Spine, Médical and LDR Brazil. All significant intercompany accounts and transactions have been eliminated in consolidation. Prior to the IPO in October 2013, Holding owned 100% of the outstanding stock and voting rights of Spine and LDR Brazil and 52.95% of the outstanding stock and voting rights of Médical. The remaining 47.05% of the outstanding shares of Médical were subject to the Escrow Agreement discussed in note 9. The shares subject to the Escrow Agreement have been considered as if converted; thus, giving Holding 100% effective ownership of all subsidiaries. After the IPO, Holding owns 100% of the outstanding stock and voting rights of Spine, Médical and LDR Brazil.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results are likely to differ from those estimates, and such differences may be material to the financial statements.
Foreign Currency Translation and Other Comprehensive Loss	Foreign Currency Translation and Other Comprehensive Loss The functional currency of the Company’s foreign subsidiaries is as follows: Médical is the euro and LDR Brazil is the real. Both companies translate monetary assets and liabilities denominated in other currencies into U.S. dollars at exchange rates in effect at each balance sheet date. Revenues and expenses are translated at the average of the exchange rates in effect during the period, and nonmonetary items are translated at historical rates. The resulting translation adjustments are included in other comprehensive loss. The accumulated foreign currency translation adjustments are reflected as accumulated other comprehensive loss, a component of stockholders’ equity (deficit). Gains and losses arising from intercompany foreign transactions are included in other income (expense) on the consolidated statements of comprehensive loss.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid investments with a remaining maturity of three months or less at date of purchase to be cash equivalents.
Restricted Cash	Restricted Cash The Company’s restricted cash at December 31, 2013 secured certain obligations under the Line of Credit (note 8).
Accounts Receivable	Accounts Receivable The Company generally extends credit to certain customers without requiring collateral; others are required to provide a letter of credit. The Company provides for an allowance for doubtful accounts based on management’s evaluations of the collectability of accounts receivable. Trade receivables are written off when the Company has determined amounts are uncollectible.
Inventory	Inventory Inventory is carried at the lower of cost or market using the weighted average method, net of an allowance for excess and obsolete inventory.
Property and Equipment	Property and Equipment Property and equipment are carried at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets. Useful lives are as follows: two to three years for computer equipment, five to ten years for furniture and equipment and surgical instruments, and the shorter of their estimated useful life or the term of the related lease for leasehold improvements. Upon retirement or sale, the cost of assets disposed and the related accumulated depreciation are removed from the accounts, and any resulting gain or loss is credited or charged to operations. Major renewals and betterments are capitalized. Repairs and maintenance and minor replacements are charged to expense as incurred.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill is not amortized, but is tested annually for impairment or more frequently if impairment indicators exist. Such indicators could include (1) a significant adverse change in legal factors or in business climate, (2) unanticipated competition, or (3) an adverse action or assessment by a regulator. The Company first assess qualitative factors before performing a quantitative assessment of the fair value of a reporting unit. If it is determined on the basis of qualitative factors that the fair value of the reporting unit is more-likely than-not less than the carrying amount, the existing quantitative impairment test is performed. The Company’s evaluation of goodwill completed during the years ended December 31, 2014 and 2013 resulted in no impairment losses. Definite lived intangible assets consists of patents and software licenses. The Company capitalizes third party legal fees and application costs related to its internally developed patents. Legal costs incurred in the defense of the Company’s patents are expensed as incurred. Definite lived intangibles are amortized over their estimated useful lives: ten years for patents and three years for software licenses. Patents and software licenses are amortized on a straight-line basis and are stated net of accumulated amortization. The Company recorded no impairment loss during the years ended December 31, 2014 and 2013.
Valuation of Long-Lived Assets	Valuation of Long-Lived Assets Long-lived assets are monitored and reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of any such asset may not be recoverable. The determination of recoverability is based on an estimate of undiscounted cash flows expected to result from the use of an asset and its eventual disposition. The estimate of undiscounted cash flows is based upon, among other things, certain assumptions about expected future operating performance, growth rates and other factors. The Company’s estimates of undiscounted cash flows may differ from actual cash flows due to, among other things, technological changes, economic conditions, changes to its business model or changes in its operating performance. If the sum of the undiscounted cash flows is less than the carrying value of the asset, an impairment charge is recognized, measured as the amount by which the carrying value exceeds the fair value of the asset. The Company did not record an impairment of the Company’s long-lived assets for any of the periods presented.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The fair value of the Company’s financial instruments reflects the amounts that the Company estimates to receive in connection with the sale of an asset or paid in connection with the transfer of a liability in an orderly transaction between market participants at the measurement date (exit price). The fair value hierarchy that prioritizes the use of inputs used in valuation techniques is as follows: Level 1 – quoted prices in active markets for identical assets and liabilities; Level 2 – observable inputs other than quoted prices in active markets, such as quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data; and Level 3 – unobservable inputs reflecting management’s assumptions, consistent with reasonably available assumptions made by other market participants. These valuations require significant judgment. As of December 31, 2014 and 2013, the fair value of the Company’s long-term debt, short-term financing and borrowings under its revolving credit agreement were categorized as Level 2 in the fair value hierarchy and approximated their carrying value due to the relatively recent issuances and short maturities and based on prevailing market rates for borrowings with similar ratings and maturities. The carrying amounts of the Company’s financial instruments, which primarily include cash and cash equivalents, accounts receivable, accounts payable and accrued expenses, approximate their fair values due to their short maturities.
Revenue Recognition	Revenue Recognition Revenue is recognized when evidence of an arrangement exists, fees are fixed or determinable, collection of the fees is reasonably assured, and delivery or customer acceptance of the product has occurred and no other significant obligations remain. Further, for direct markets (U.S., France and Germany), the Company recognizes revenue on its products when the spinal implant is used in surgery and a valid purchase order has been received. The Company generally recognizes revenue from sales to distributors at the time the product is shipped to the distributor. Distributors, who sell the products to their customers, take title to the products and assume all risks of ownership at the time of shipment.
Shipping and Handling	Shipping and Handling Shipping and handling costs billed to customers are included in cost of goods sold and were immaterial for the periods presented.
Advertising Costs	Advertising Costs The Company expenses advertising costs as incurred.
Research and Development	Research and Development The Company expenses research and development costs as incurred.
Stock-Based Compensation	Stock-Based Compensation The Company recognizes compensation costs for all stock-based payment awards made to employees based upon each award’s estimated grant date fair value. The Company utilizes the Black-Scholes option pricing model, which requires a number of assumptions to determine the fair value of the awards. Compensation cost is recognized on a straight-line basis over the requisite service period of the award, net of an estimated forfeiture rate. Adjustments for actual forfeitures are made in the period in which they occur.
Net Loss Per Share	Net Loss Per Share The Company computes basic net loss per common share by dividing net loss attributable to common stockholders by the weighted average common shares outstanding for the period, which includes shares of Médical that are subject to the Escrow Agreement discussed in note 9 prior to the IPO. During periods of income, the Company allocates participating securities a proportional share of income determined by dividing total weighted average participating securities by the sum of the total weighted average common shares and participating securities (the two-class method). The Company’s preferred stock participates in any dividends declared by the Company and are therefore considered to be participating securities. During periods of loss, the Company allocates no loss to participating securities because they have no contractual obligation to share in the losses of the Company. Warrants that are liability classified are excluded from the calculation of basic net loss per share. The Company computes diluted net loss per common share after giving consideration to the dilutive effect of the Company’s convertible preferred stock, stock options and warrants that are outstanding during the period and the conversion of the Company’s convertible debt into shares of common stock, except where such would be anti-dilutive. Because the Company reported losses for the periods presented, all potentially dilutive common shares consisting of preferred stock, stock options, warrants and convertible debt are antidilutive. Refer to note 14 for the Company’s calculation of net loss per share for the periods presented.
Income Taxes	Medical Device Excise Tax Effective as of January 1, 2013, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Affordability Reconciliation Act, imposed a medical device excise tax (MDET) of 2.3% on any entity that manufactures or imports certain medical devices offered for sale in the United States. Income Taxes The Company accounts for income taxes using the asset and liability method whereby deferred tax asset and liability account balances are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws expected to be in effect when the asset or liability is expected to be realized or settled. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount that is deemed more likely than not to be realized. In the ordinary course of business, there are many transactions for which the ultimate tax outcome is uncertain. The Company assesses uncertain tax positions in each of the tax jurisdictions in which it has operations and accounts for the related financial statement implications. Unrecognized tax benefits are reported using the two step approach under which tax effects of a position are recognized only if it is more likely than not to be sustained and the amount of the tax benefit recognized is equal to the largest tax benefit that is greater than fifty percent likely of being realized upon ultimate settlement of the tax position. Determining the appropriate level of unrecognized tax benefits requires the Company to exercise judgment regarding the uncertain application of tax law. The amount of unrecognized tax benefits is adjusted when information becomes available or when an event occurs indicating a change is appropriate. The Company includes interest and penalties related to its uncertain tax positions as part of income tax expense, if any.
Interest Expense	Interest Expense The Company amortizes discounts associated with long-term debt obligations using the effective interest rate method.
Recent Accounting Pronouncements	In May 2014, the Financial Accounting Standards Board, or FASB, issued ASU No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU 2014-09 will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The new standard is effective for the Company on January 1, 2017. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method and it has not determined the effect of the standard on its ongoing financial reporting. In June 2014, the FASB issued ASU No. 2014-12, Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period (ASU 2014-12). ASU 2014-12 requires that a performance target that affects vesting of share-based payment awards and that could be achieved after the requisite service period be treated as a performance condition. ASU 2014-12 is effective for all entities for interim and annual periods beginning after December 15, 2015, with early adoption permitted. An entity may apply the amendments in ASU 2014-12 either (i) prospectively to all awards granted or modified after the effective date or (ii) retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements and to all new or modified awards thereafter. The adoption of ASU 2014-12 is not expected to have a material impact on the Company's consolidated financial condition or results of operations.

Significant Accounting Policies - (Policies)

12 Months Ended

Dec. 31, 2014

Certain reclassifications have been made to prior periods’ consolidated financial statements to conform to the current period presentation. These reclassifications did not result in any change in previously reported net loss, total assets or stockholders’ deficit.

Principles of Consolidation

The accompanying consolidated financial statements include the results of Holding and its subsidiaries, Spine, Médical and LDR Brazil. All significant intercompany accounts and transactions have been eliminated in consolidation.

Prior to the IPO in October 2013, Holding owned 100% of the outstanding stock and voting rights of Spine and LDR Brazil and 52.95% of the outstanding stock and voting rights of Médical. The remaining 47.05% of the outstanding shares of Médical were subject to the Escrow Agreement discussed in note 9. The shares subject to the Escrow Agreement have been considered as if converted; thus, giving Holding 100% effective ownership of all subsidiaries.

After the IPO, Holding owns 100% of the outstanding stock and voting rights of Spine, Médical and LDR Brazil.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results are likely to differ from those estimates, and such differences may be material to the financial statements.

Foreign Currency Translation and Other Comprehensive Loss

The functional currency of the Company’s foreign subsidiaries is as follows: Médical is the euro and LDR Brazil is the real. Both companies translate monetary assets and liabilities denominated in other currencies into U.S. dollars at exchange rates in effect at each balance sheet date. Revenues and expenses are translated at the average of the exchange rates in effect during the period, and nonmonetary items are translated at historical rates. The resulting translation adjustments are included in other comprehensive loss. The accumulated foreign currency translation adjustments are reflected as accumulated other comprehensive loss, a component of stockholders’ equity (deficit). Gains and losses arising from intercompany foreign transactions are included in other income (expense) on the consolidated statements of comprehensive loss.

Cash and Cash Equivalents

The Company considers all highly liquid investments with a remaining maturity of three months or less at date of purchase to be cash equivalents.

Restricted Cash

The Company’s restricted cash at December 31, 2013 secured certain obligations under the Line of Credit (note 8).

Accounts Receivable

The Company generally extends credit to certain customers without requiring collateral; others are required to provide a letter of credit. The Company provides for an allowance for doubtful accounts based on management’s evaluations of the collectability of accounts receivable. Trade receivables are written off when the Company has determined amounts are uncollectible.

Inventory

Inventory is carried at the lower of cost or market using the weighted average method, net of an allowance for excess and obsolete inventory.

Property and Equipment

Property and equipment are carried at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets. Useful lives are as follows: two to three years for computer equipment, five to ten years for furniture and equipment and surgical instruments, and the shorter of their estimated useful life or the term of the related lease for leasehold improvements. Upon retirement or sale, the cost of assets disposed and the related accumulated depreciation are removed from the accounts, and any resulting gain or loss is credited or charged to operations. Major renewals and betterments are capitalized. Repairs and maintenance and minor replacements are charged to expense as incurred.

Goodwill and Other Intangible Assets

Goodwill is not amortized, but is tested annually for impairment or more frequently if impairment indicators exist. Such indicators could include (1) a significant adverse change in legal factors or in business climate, (2) unanticipated competition, or (3) an adverse action or assessment by a regulator.

The Company first assess qualitative factors before performing a quantitative assessment of the fair value of a reporting unit. If it is determined on the basis of qualitative factors that the fair value of the reporting unit is more-likely than-not less than the carrying amount, the existing quantitative impairment test is performed. The Company’s evaluation of goodwill completed during the years ended December 31, 2014 and 2013 resulted in no impairment losses.

Definite lived intangible assets consists of patents and software licenses. The Company capitalizes third party legal fees and application costs related to its internally developed patents. Legal costs incurred in the defense of the Company’s patents are expensed as incurred.

Definite lived intangibles are amortized over their estimated useful lives: ten years for patents and three years for software licenses. Patents and software licenses are amortized on a straight-line basis and are stated net of accumulated amortization. The Company recorded no impairment loss during the years ended December 31, 2014 and 2013.

Valuation of Long-Lived Assets

Long-lived assets are monitored and reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of any such asset may not be recoverable. The determination of recoverability is based on an estimate of undiscounted cash flows expected to result from the use of an asset and its eventual disposition. The estimate of undiscounted cash flows is based upon, among other things, certain assumptions about expected future operating performance, growth rates and other factors. The Company’s estimates of undiscounted cash flows may differ from actual cash flows due to, among other things, technological changes, economic conditions, changes to its business model or changes in its operating performance. If the sum of the undiscounted cash flows is less than the carrying value of the asset, an impairment charge is recognized, measured as the amount by which the carrying value exceeds the fair value of the asset. The Company did not record an impairment of the Company’s long-lived assets for any of the periods presented.

Fair Value of Financial Instruments

The fair value of the Company’s financial instruments reflects the amounts that the Company estimates to receive in connection with the sale of an asset or paid in connection with the transfer of a liability in an orderly transaction between market participants at the measurement date (exit price). The fair value hierarchy that prioritizes the use of inputs used in valuation techniques is as follows:

Level 1 – quoted prices in active markets for identical assets and liabilities;

Level 2 – observable inputs other than quoted prices in active markets, such as quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data; and

Level 3 – unobservable inputs reflecting management’s assumptions, consistent with reasonably available assumptions made by other market participants. These valuations require significant judgment.

As of December 31, 2014 and 2013, the fair value of the Company’s long-term debt, short-term financing and borrowings under its revolving credit agreement were categorized as Level 2 in the fair value hierarchy and approximated their carrying value due to the relatively recent issuances and short maturities and based on prevailing market rates for borrowings with similar ratings and maturities. The carrying amounts of the Company’s financial instruments, which primarily include cash and cash equivalents, accounts receivable, accounts payable and accrued expenses, approximate their fair values due to their short maturities.

Revenue Recognition

Revenue is recognized when evidence of an arrangement exists, fees are fixed or determinable, collection of the fees is reasonably assured, and delivery or customer acceptance of the product has occurred and no other significant obligations remain. Further, for direct markets (U.S., France and Germany), the Company recognizes revenue on its products when the spinal implant is used in surgery and a valid purchase order has been received. The Company generally recognizes revenue from sales to distributors at the time the product is shipped to the distributor. Distributors, who sell the products to their customers, take title to the products and assume all risks of ownership at the time of shipment.

Shipping and Handling

Shipping and handling costs billed to customers are included in cost of goods sold and were immaterial for the periods presented.

Advertising Costs

The Company expenses advertising costs as incurred.

Research and Development

The Company expenses research and development costs as incurred.

Stock-Based Compensation

The Company recognizes compensation costs for all stock-based payment awards made to employees based upon each award’s estimated grant date fair value. The Company utilizes the Black-Scholes option pricing model, which requires a number of assumptions to determine the fair value of the awards. Compensation cost is recognized on a straight-line basis over the requisite service period of the award, net of an estimated forfeiture rate. Adjustments for actual forfeitures are made in the period in which they occur.

Net Loss Per Share

The Company computes basic net loss per common share by dividing net loss attributable to common stockholders by the weighted average common shares outstanding for the period, which includes shares of Médical that are subject to the Escrow Agreement discussed in note 9 prior to the IPO. During periods of income, the Company allocates participating securities a proportional share of income determined by dividing total weighted average participating securities by the sum of the total weighted average common shares and participating securities (the two-class method). The Company’s preferred stock participates in any dividends declared by the Company and are therefore considered to be participating securities. During periods of loss, the Company allocates no loss to participating securities because they have no contractual obligation to share in the losses of the Company. Warrants that are liability classified are excluded from the calculation of basic net loss per share. The Company computes diluted net loss per common share after giving consideration to the dilutive effect of the Company’s convertible preferred stock, stock options and warrants that are outstanding during the period and the conversion of the Company’s convertible debt into shares of common stock, except where such would be anti-dilutive. Because the Company reported losses for the periods presented, all potentially dilutive common shares consisting of preferred stock, stock options, warrants and convertible debt are antidilutive. Refer to note 14 for the Company’s calculation of net loss per share for the periods presented.

Income Taxes

Medical Device Excise Tax

Effective as of January 1, 2013, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Affordability Reconciliation Act, imposed a medical device excise tax (MDET) of 2.3% on any entity that manufactures or imports certain medical devices offered for sale in the United States.

Income Taxes

The Company accounts for income taxes using the asset and liability method whereby deferred tax asset and liability account balances are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws expected to be in effect when the asset or liability is expected to be realized or settled. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount that is deemed more likely than not to be realized.

In the ordinary course of business, there are many transactions for which the ultimate tax outcome is uncertain. The Company assesses uncertain tax positions in each of the tax jurisdictions in which it has operations and accounts for the related financial statement implications. Unrecognized tax benefits are reported using the two step approach under which tax effects of a position are recognized only if it is more likely than not to be sustained and the amount of the tax benefit recognized is equal to the largest tax benefit that is greater than fifty percent likely of being realized upon ultimate settlement of the tax position. Determining the appropriate level of unrecognized tax benefits requires the Company to exercise judgment regarding the uncertain application of tax law. The amount of unrecognized tax benefits is adjusted when information becomes available or when an event occurs indicating a change is appropriate. The Company includes interest and penalties related to its uncertain tax positions as part of income tax expense, if any.

Interest Expense

The Company amortizes discounts associated with long-term debt obligations using the effective interest rate method.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board, or FASB, issued ASU No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09), which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU 2014-09 will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The new standard is effective for the Company on January 1, 2017. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method and it has not determined the effect of the standard on its ongoing financial reporting.

In June 2014, the FASB issued ASU No. 2014-12, Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period (ASU 2014-12). ASU 2014-12 requires that a performance target that affects vesting of share-based payment awards and that could be achieved after the requisite service period be treated as a performance condition. ASU 2014-12 is effective for all entities for interim and annual periods beginning after December 15, 2015, with early adoption permitted. An entity may apply the amendments in ASU 2014-12 either (i) prospectively to all awards granted or modified after the effective date or (ii) retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements and to all new or modified awards thereafter. The adoption of ASU 2014-12 is not expected to have a material impact on the Company's consolidated financial condition or results of operations.