| Inventories | 9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Sep. 30, 2017 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Inventories | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Inventories | 4. Inventories 
 Inventories are comprised of unprocessed tissue, work-in-process, Avance® Nerve Graft, AxoGuard® Nerve Connector, AxoGuard® Nerve Protector, Avive® Soft Tissue Membrane, AcroVal® Neurosensory and Motor Testing System, AxoTouch® Two-Point Discriminator and supplies and are valued at the lower of cost (first-in, first-out) or market and consist of the following: 
 
 
 Inventories are net of reserve of approximately $642,000 and $960,000 at September 30, 2017 and December 31, 2016, respectively. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||