v3.4.0.3
Stock-Based Compensation - Share-Based Compensation Included in Unaudited Results of Operations (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Total stock option/warrant expense, included in total operating expenses $ 77 $ 51
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 23
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
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 $ 28 $ 17