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Debt - Additional Information (Detail) |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |
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Feb. 05, 2016 USD ($) | Jan. 01, 2016 USD ($) | Jul. 10, 2015 USD ($) | Nov. 21, 2014 USD ($) shares | Mar. 20, 2014 USD ($) shares | Mar. 20, 2014 USD ($) shares | Mar. 17, 2014 USD ($) shares | Aug. 30, 2013 USD ($) | Aug. 30, 2013 USD ($) | Oct. 31, 2014 USD ($) | Apr. 30, 2014 USD ($) | Oct. 31, 2013 USD ($) | Dec. 31, 2015 USD ($) payment shares | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Sep. 01, 2016 | Mar. 11, 2016 USD ($) | Feb. 04, 2016 | Jul. 31, 2015 USD ($) | Jul. 30, 2013 USD ($) | Feb. 28, 2013 USD ($)
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit, repayment |  |  |  |  |  |  |  |  |  |  |  |  | $ 144,567,000 | $ 156,106,000 | $ 168,855,000 |  |  |  |  |  |
Borrowings under lines of credit |  |  |  |  |  |  |  |  |  |  |  |  | 141,583,000 | 163,067,000 | 154,622,000 |  |  |  |  |  |
Non-cash interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 300,000 | 300,000 | 200,000 |  |  |  |  |  |
Transaction fees |  |  |  |  |  |  |  |  |  |  |  |  | 5,279,000 | 7,331,000 |  |  |  |  |  |  |
Litigation settlement expense |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 45,982,000 |  |  |  |  |  |
Restricted cash |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,350,000 | 4,400,000 |  |  |  |  |  |  |
Capital leases maturity |  |  |  |  |  |  |  |  |  |  |  |  | September 2018 |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital leases interest percentage |  |  |  |  |  |  |  |  |  |  |  |  | 6.60% |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital leases interest percentage |  |  |  |  |  |  |  |  |  |  |  |  | 9.60% |  |  |  |  |  |  |  |
Working Capital Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,300,000 | 5,300,000 | $ 3,600,000 |  |  |  |  |  |
Amended Credit Facility with MidCap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 73,000,000 | $ 73,000,000 |  |  |  | 56,799,000 | 60,390,000 |  |  |  |  |  | $ 50,000,000 |
Proceeds line of credit |  |  |  |  |  |  |  |  | 28,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  |  |  |  |  |  |  |  | 400,000 |  |  |  |  |  |  |  |  |  |  |  |
Less: debt discount |  |  |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |
Debt default, interest rate increase |  |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amendment fee amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000
Amended Credit Facility with MidCap [Member] | Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount drawn on line of credit |  |  |  |  |  |  |  | 40,000,000 | 40,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Line of credit, balance |  |  |  |  |  |  |  |  |  |  |  |  | $ 28,800,000 |  |  |  |  |  |  |  |
Line of credit, interest rate description |  |  |  |  |  |  |  |  |  |  |  |  | LIBOR plus 6.0% |  |  |  |  |  |  |  |
Basis spread on variable line of credit rate |  |  |  |  |  |  |  |  |  |  |  |  | 6.00% |  |  |  |  |  |  |  |
Interest rate of revolving line of credit |  |  |  |  |  |  |  |  |  |  |  |  | 6.20% |  |  |  |  |  |  |  |
Amended Credit Facility with MidCap [Member] | Working Capital Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit, balance |  |  |  |  |  |  |  |  |  |  |  |  | $ 28,800,000 |  |  |  |  |  |  |  |
Amended Credit Facility with MidCap [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | 38,000,000 | $ 38,000,000 |  |  |  |  |  |  |  |  |  | $ 5,000,000 |  |
Proceeds line of credit |  |  |  |  |  |  |  | $ 28,000,000 |  |  | $ 5,000,000 |  |  |  |  |  |  |  |  |  |
Line of credit, balance |  |  |  |  |  |  |  |  |  |  |  |  | $ 28,000,000 |  |  |  |  |  |  |  |
Line of credit, interest rate description |  |  |  |  |  |  |  |  |  |  |  |  | ("LIBOR") plus 8.0% |  |  |  |  |  |  |  |
Line of credit, interest rate floor |  |  |  |  |  |  |  |  |  |  |  |  | 9.50% |  |  |  |  |  |  |  |
Basis spread on variable line of credit rate |  |  |  |  |  |  |  |  |  |  |  |  | 8.00% |  |  |  |  |  |  |  |
Interest rate of revolving line of credit |  |  |  |  |  |  |  |  |  |  |  |  | 9.50% |  |  |  |  |  |  |  |
Term loan payments |  |  |  |  |  |  |  |  |  | $ 500,000 |  | $ 300,000 |  |  |  |  |  |  |  |  |
Deerfield [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 50,000,000 |  |  |  |  |  | $ 26,000,000 | $ 26,000,000 |  |  |  |  |  |  |
Line of credit, balance |  |  |  | $ 6,000,000 | $ 20,000,000 | $ 20,000,000 |  |  |  |  |  |  | $ 26,000,000 |  |  |  |  |  |  |  |
Aggregate amount of draw down for working capital |  |  |  |  |  |  | 15,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit, transaction fees, amount |  |  |  |  |  |  | $ 2,500,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transaction fee as percentage of principal amount |  |  |  |  |  |  | 2.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility agreement stated interest rate |  |  |  |  |  |  | 8.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common shares to be called by warrants | shares |  |  |  |  |  |  |  |  |  |  |  |  | 11,450,000 |  |  |  |  |  |  |  |
Net proceeds from initial draw under Facility Agreement |  |  |  |  | 19,500,000 | 19,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transaction fees |  |  |  | $ 200,000 | 500,000 | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of warrants issued | shares |  |  |  | 1,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants value |  |  |  | $ 900,000 | 4,700,000 | 4,700,000 | $ 5,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional borrowing under term loan |  |  | $ 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant amount reclassified as debt discount |  |  |  | 200,000 | $ 2,300,000 | $ 2,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from draw under Facility Agreement |  |  |  | $ 5,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equal annual payments | payment |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |
Deerfield [Member] | Warrants Issued on March 17, 2014 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common shares to be called by warrants | shares |  |  |  |  |  |  | 6,250,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deerfield [Member] | Warrants issued on March 20, 2014 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common shares to be called by warrants | shares |  |  |  |  | 4,000,000 | 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of warrants issued | shares |  |  |  |  | 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deerfield [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares to purchase under warrants | shares |  |  |  |  |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Orthotec LLC, Litigation Settlement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Litigation settlement expense |  |  |  |  |  |  |  |  |  |  |  |  | $ 23,000,000 |  |  |  |  |  |  |  |
Payments for settlements |  | $ 1,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Third Amendment to Amended Credit Facility with MidCap [Member] [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amendment fee amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 |  |  |  |
Subsequent Event [Member] | Deerfield [Member] | Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amendment fee amount | $ 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amendment fee, quarterly amount | $ 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Deerfield [Member] | Amended Credit Facility with Deerfield [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Facility agreement stated interest rate | 14.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.75% |  |  |
Portion of interest paid-in-kind, percentage | 6.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Scenario, Forecast [Member] | Deerfield [Member] | Amended Credit Facility with Deerfield [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Portion of interest paid-in-kind, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.00% |  |  |  |  |

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- Definition Capital leases interest percentage. + References No definition available. + Details
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- Definition Class of Warrant or Right, Amount Reclassified as Debt Discount + References No definition available. + Details
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- Definition Class of Warrant or Right, Number of Securities Called by Warrants or Rights Associated with Each Disbursement Borrowing + References No definition available. + Details
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- Definition Debt Instrument, Debt Default, Interest Rate Increase + References No definition available. + Details
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- Definition Debt Instrument, Fee, Installment Amount + References No definition available. + Details
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- Definition Debt Instrument, Portion of Interest Paid-in-Kind, Percentage + References No definition available. + Details
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- Definition Lease Agreement Maturity Period + References No definition available. + Details
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- Definition Line of Credit Facility, Capacity Available for Working Capital + References No definition available. + Details
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- Definition Line of Credit Facility, Floor on Interest Rate, Percentage + References No definition available. + Details
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- Definition Line of Credit Facility, Increment Amount of Draw Down for General Corporate Purposes + References No definition available. + Details
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- Definition Line of Credit Facility, Transaction Fee as Percentage of Principal Amount + References No definition available. + Details
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- Definition Net Proceeds from Draw Under Facility Agreement + References No definition available. + Details
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- Definition Net Proceeds from Initial Draw Under Facility Agreement + References No definition available. + Details
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- Definition Number of Equal Annual Payments to Make Under Facility Agreement + References No definition available. + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Amount of the fee that accompanies borrowing money under the debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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