Debt (Details Textual) - USD ($) | Aug. 12, 2016 | May 25, 2016 | Aug. 10, 2015 | Apr. 14, 2016 | Jul. 31, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 27, 2016 | Jul. 29, 2016 | Dec. 31, 2015 |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Royalty Expenses Description | | | | | | | | royalty of 1.75% on the first $45,000,000 of net sales, plus 1.0% of net sales in excess of $45,000,000 | | | | |
Debt Instrument, Face Amount | | | | | $ 65,000,000 | | | | | | | |
Business Acquisition, Percentage of Voting Interests Acquired | | | | | 100.00% | | | | | | | |
Business Combination Conjunction Related Expenses | | | | | $ 4,700,000 | | | | | | | |
Payments of Debt Issuance Costs | | | | | $ 2,200,000 | | | | | | | |
Business Combination Expenses Related To Future Acquisition | | | | | | | | | | | | $ 2,500,000 |
Line of Credit Facility, Expiration Date | | | | | Jul. 15, 2021 | | | | | | | |
Gains (Losses) on Extinguishment of Debt, Total | | | | | | $ 0 | $ 2,345,019 | $ 0 | $ 2,345,019 | | | |
Debt Instrument, Convertible, Extent Not Convertible, Beneficial Ownership Percentage | | | | | | 9.99% | | 9.99% | | | | |
Acquisition Of X Spine Systems Inc [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Payments of Debt Issuance Costs | | | | | | | | $ 2,300,000 | | | | |
Extinguishment of Debt, Amount | | | | | $ 12,300,000 | | | | | | | |
Accrued Royalties | | | | | $ 7,400,000 | | | | | | | |
Xspine [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Debt Instrument, Interest Rate During Period | | | | | 6.00% | | | | | | | |
New Facility [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Line of Credit Facility, Current Borrowing Capacity | | | | | $ 18,000,000 | | | | | | | |
Line of Credit Facility, Expiration Date | | | | | Jul. 31, 2020 | | | | | | | |
Gains (Losses) on Extinguishment of Debt, Total | | | | | $ 2,345,019 | | | | | | | |
Line Of Credit Facility Loans Outstanding Payment Fee | | | | | 7.50% | | | | | | | |
New Facility [Member] | First Period [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Portion Payable in Cash | | | | | 9.00% | | | | | | | |
Debt Instrument, Interest Rate, Portion Payable in Kind | | | | | 14.00% | | | | | | | |
Debt Instrument, Interest Rate, Addition to PIK Portion | | | | | 1.00% | | | | | | | |
Debt Instrument, Interest Rate, PIK Portion, Subtraction | | | | | 9.00% | | | | | | | |
New Facility [Member] | Optional Pik Period [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Portion Payable in Kind | | | | | 14.00% | | | | | | | |
Debt Instrument, Interest Rate, Addition to PIK Portion | | | | | 1.00% | | | | | | | |
New Facility [Member] | Second Period [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Portion Payable in Cash | | | | | 12.00% | | | | | | | |
Debt Instrument, Interest Rate, Portion Payable in Kind | | | | | 14.00% | | | | | | | |
Debt Instrument, Interest Rate, Addition to PIK Portion | | | | | 1.00% | | | | | | | |
Debt Instrument, Interest Rate, PIK Portion, Subtraction | | | | | 12.00% | | | | | | | |
Amendment to the New Facility [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Line Of Credit Facility Minimum Liquidity Through Januray 1 2017 | | | | | | $ 500,000 | | $ 500,000 | | | | |
Fourth Amendment to Amended and Restated Credit Agreement [Member] | OrbiMed and ROS [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Debt Instrument Additional Tranche A Commitment | | | | | | | | | | | $ 1,000,000 | |
Sixth Amendement To The Restated New Credit Faciltiy [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Line Of Credit Facility Loans Paid In Kind Interest Percentage | | | | | | | | | | 9.00% | | |
Sixth Amendement To The Restated New Credit Faciltiy [Member] | Minimum [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Line Of Credit Facility Loans Outstanding Payment Fee Percentage | | | | | | | | | | 7.50% | | |
Sixth Amendement To The Restated New Credit Faciltiy [Member] | Maximum [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Line Of Credit Facility Loans Outstanding Payment Fee Percentage | | | | | | | | | | 9.00% | | |
Convertible Notes Payable [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | $ 52,000,000 | | | | | | | |
Debt Instrument, Interest Rate During Period | | | | | 6.00% | | | | | | | |
Debt Instrument Purchase Of Additional Notes | | | $ 3,000,000 | | | | | | | | | |
Conversion of Stock, Shares Converted | | | | | 257.5163 | | | | | | | |
Conversion of Stock, Amount Converted | | | | | $ 1,000 | | | | | | | |
Debt Instrument, Convertible, Conversion Price | | | | | $ 3.88 | | | | | | | |
Term Loan [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Line of Credit Facility, Current Borrowing Capacity | | | | | $ 24,000,000 | | | | | | | |
Silicon Valley Bank [Member] | Revolving Credit Facility [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | $ 6,000,000 | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | | 1.00% | | | | | | | | | | |
Silicon Valley Bank [Member] | First Loan Modification Agreement [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | $ 11,000,000 | | | | | | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | 4.00% | | | | | | | | | | | |
Convertible Senior Unsecured Notes [Member] | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | $ 2,238,166.45 | | | | | | | | |
Debt Instrument, Interest Rate During Period | | | | 6.00% | | | | | | | | |
Conversion of Stock, Shares Converted | | | | 344.8276 | | | | | | | | |
Conversion of Stock, Amount Converted | | | | $ 1,000 | | | | | | | | |
Debt Instrument, Convertible, Conversion Price | | | | $ 2.90 | | | | | | | | |