v3.5.0.2
Stock-Based Compensation - Share-Based Compensation Included in Unaudited Results of Operations (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Total stock option/warrant expense, included in total operating expenses $ 78 $ 52 $ 155 $ 103
Officer Compensation [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Total stock option/warrant expense, included in total operating expenses 33 24 66 47
Non-employee Directors [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Total stock option/warrant expense, included in total operating expenses 16 11 32 22
Sales, General and Administrative [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Total stock option/warrant expense, included in total operating expenses $ 29 $ 17 $ 57 $ 34