Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Warrant Liabilities And Convertible Notes At Fair Value (Detail)

v3.6.0.2
Fair Value Measurements - Warrant Liabilities And Convertible Notes At Fair Value (Detail) - $ / shares
 1 Months Ended 12 Months Ended
Sep. 30, 2016
Dec. 31, 2016
Warrants Issuable [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Risk free rate 1.14%  
Expected dividend yield 0.00%  
Expected term in years 5 years  
Expected volatility 118.85%  
Avenue [Member] | Convertible Debt [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Expected volatility   63.10%
Avenue [Member] | Minimum [Member] | Convertible Debt [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Risk free rate   0.62%
Expected term in years   6 months
Avenue [Member] | Maximum [Member] | Convertible Debt [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Risk free rate   1.20%
Expected term in years   2 years
Avenue [Member] | Warrant [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Risk free rate   2.45%
Expected dividend yield   0.00%
Expected term in years   10 years
Expected volatility   87.00%
Helocyte [Member] | Convertible Debt [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Expected dividend yield   0.00%
Expected volatility   61.70%
Helocyte [Member] | Minimum [Member] | Convertible Debt [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Risk free rate   0.74%
Expected term in years   9 months
Helocyte [Member] | Maximum [Member] | Convertible Debt [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Risk free rate   1.17%
Expected term in years   1 year 10 months 28 days
Helocyte [Member] | Warrant [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Expected dividend yield   0.00%
Expected volatility   70.00%
Strike price   $ 0.44
Helocyte [Member] | Warrant [Member] | Minimum [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Risk free rate   1.82%
Expected term in years   4 years 6 months
Helocyte [Member] | Warrant [Member] | Maximum [Member]    
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]    
Risk free rate   1.91%
Expected term in years   4 years 11 months 1 day