v3.3.1.900
Stockholders' Equity - Stock-Based Compensation Included in Unaudited Results of Operations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total share-based compensation expense before taxes $ 218 $ 86 $ 109
Related deferred income tax benefits 0 0 0
Share-based compensation expense 218 86 109
Sales, General and Administrative [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total share-based compensation expense before taxes 218 86 69
Research and Development [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total share-based compensation expense before taxes     40
Non-employee Directors [Member] | Sales, General and Administrative [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total share-based compensation expense before taxes 47 19 11
Officer Compensation [Member] | Sales, General and Administrative [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total share-based compensation expense before taxes 97 39 40
Others [Member] | Sales, General and Administrative [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Total share-based compensation expense before taxes $ 74 $ 28 $ 18