XML 24 R29.htm IDEA: XBRL DOCUMENT v3.2.0.727
Assets and Liability Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Dec. 31, 2013
Liabilities:        
Derivative liability $ 6,700 $ 7,519 $ 13,913 $ 17,994
Long-term debt derivative liabilities 6,700 7,400    
Fair Value, Measurements, Recurring        
Asset:        
Cash equivalents-money markets 40,170 65,156    
Liabilities:        
Long-term debt derivative liabilities 6,700 7,400    
Fair Value, Measurements, Recurring | Warrant        
Liabilities:        
Derivative liability   119    
Fair Value, Measurements, Recurring | Level 1        
Asset:        
Cash equivalents-money markets 40,170 65,156    
Fair Value, Measurements, Recurring | Level 3        
Liabilities:        
Long-term debt derivative liabilities $ 6,700 7,400    
Fair Value, Measurements, Recurring | Level 3 | Warrant        
Liabilities:        
Derivative liability   $ 119