Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Employee Stock Purchase Programs (Detail)

v3.7.0.1
Stockholders' Equity - Employee Stock Purchase Programs (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense $ 2,929 $ 2,866
Fortress Companies [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense [1] 1,086 1,279
Employee Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense 1,830 1,584
Non-Employee Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense $ 13 $ 3
[1] Consists of approximately $5,000 of Avenue's compensation expenses, approximately $1.0 million of Checkpoint's compensation expenses, approximately $46,000 of JMC's compensation expenses, approximately $47,000 of Helocyte's compensation expenses and approximately $8,000 of Cellvation's compensation expenses on equity grants for the three months ended March 31, 2017.