Quarterly report pursuant to Section 13 or 15(d)

- Stock-based Compensation Expense Related to Stock Options (Detail)

v3.2.0.727
- Stock-based Compensation Expense Related to Stock Options (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense related to stock options $ 819 $ 272 $ 1,115 $ 382
Research and development [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense related to stock options 62 100 114 162
Selling, general and administrative [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense related to stock options 689 135 900 170
Discontinued operations [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense related to stock options $ 68 $ 37 $ 101 $ 50