v3.5.0.2
Stock-Based Compensation - Share-Based Compensation Included in Unaudited Results of Operations (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 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 $ 70,000 $ 54,000 $ 225,000 $ 156,000
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 33,000 24,000 99,000 70,000
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 16,000 11,000 48,000 34,000
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 $ 21,000 $ 19,000 $ 78,000 $ 52,000