Quarterly report pursuant to Section 13 or 15(d)

Debt and Interest - Long-term debt (Detail)

v3.5.0.2
Debt and Interest - Long-term debt (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Debt [Line Items]    
Total notes payable, long-term $ 22,217 $ 24,009
Less: Discount on notes payable 412 835
Total notes payable, long-term, net 20,805 23,174
IDB Note [Member]    
Debt [Line Items]    
Total notes payable, long-term $ 14,009 14,009
Interest Rate 2.25%  
Maturity Date Feb - 2017  
NSC Note [Member]    
Debt [Line Items]    
Total notes payable, long-term $ 7,208 10,000
Interest Rate 8.00%  
Maturity Date Mar - 2018  
Helocyte Convertible Note [Member]    
Debt [Line Items]    
Total notes payable, long-term $ 1,000 $ 0
Maturity Date Dec - 2017  
Helocyte Convertible Note [Member] | Minimum [Member]    
Debt [Line Items]    
Interest Rate 5.00%  
Helocyte Convertible Note [Member] | Maximum [Member]    
Debt [Line Items]    
Interest Rate 8.00%