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 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Gain due to change in value of note payable $ 67 $ (316) $ 101 $ (406)
Gain due to expiration of warrant liability $ 0 $ (181) 17 (196)
BioServe        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Gain due to change in value of note payable     101 $ (406)
VenturEast | BioServe        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Number of shares associated with notes payable 84,278      
Gain due to change in value of note payable $ 67   $ 101  
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