Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Additional Information (Details)

v3.5.0.2
Fair Value Measurements - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Gain due to change in value of note payable $ 18 $ 315 $ 119 $ (91)
Gain due to expiration of warrant liability $ 712 $ 214 729 18
BioServe        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Gain due to change in value of note payable     119 $ (91)
VenturEast | BioServe        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Number of shares associated with notes payable (in shares) 84,278      
Gain due to change in value of note payable $ 18   119  
Significant Unobservable Inputs (Level 3) | Fair value measurements, recurring        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Gain due to expiration of warrant liability     17  
2016 Offering | Significant Unobservable Inputs (Level 3) | Fair value measurements, recurring        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Gain due to expiration of warrant liability $ 712   $ 712