Consolidated Statements of Changes in Equity - USD ($)
$ in Thousands
Total
MobileNet [Member]
Euroscan Holding B.V. [Member]
Series A Convertible Preferred Stock [Member]
Common Stock [Member]
Common Stock [Member]
MobileNet [Member]
Common Stock [Member]
Euroscan Holding B.V. [Member]
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
MobileNet [Member]
Additional Paid-in Capital [Member]
Euroscan Holding B.V. [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Deficit [Member]
Treasury Stock [Member]
Noncontrolling Interests [Member]
Beginning balances at Dec. 31, 2012 $ 182,388     $ 1,612 $ 47     $ 248,469     $ 633 $ (67,956) $ (96) $ (321)
Beginning balances, shares at Dec. 31, 2012       161,359 46,783,568               29,990  
Vesting of restricted stock units, shares         93,821                  
Stock-based compensation 2,779             2,779            
Conversion of Series A convertible preferred stock to common stock       $ (652)       652            
Conversion of Series A convertible preferred stock to common stock, shares       (65,237) 108,688                  
Issuance of common stock in connection with the acquisition   $ 1,633             $ 1,633          
Issuance of common stock in connection with the acquisition, shares           329,344                
Exercise of stock options 1,826       $ 1     1,825            
Exercise of stock options, shares         647,177                  
Exercise of SARs, shares         253,882                  
Series A convertible preferred stock dividend       $ 59               (59)    
Series A convertible preferred stock dividend, shares       5,932                    
Net (loss) income 4,759                     4,599   160
Foreign currency translation adjustments (437)                   (398)     (39)
Ending balances at Dec. 31, 2013 192,948     $ 1,019 $ 48     255,358     235 (63,416) $ (96) (200)
Ending balances, shares at Dec. 31, 2013       102,054 48,216,480               29,990  
Vesting of restricted stock units, shares         289,538                  
Stock-based compensation 3,519             3,519            
Proceeds received from issuance of common stock in connection with public offerings, net of underwriters’ discounts and commissions and offering costs 114,738       $ 21     114,717            
Proceeds received from issuance of common stock in connection with public offerings, net of underwriters’ discounts and commissions and offering costs, shares         21,110,714                  
Common stock issued as form of payment for MPUs 213             213            
Common stock issued as payment for MPUs, shares         33,594                  
Conversion of Series A convertible preferred stock to common stock       $ (147)       147            
Conversion of Series A convertible preferred stock to common stock, shares       (14,850) 24,740                  
Issuance of common stock in connection with the acquisition     $ 2,243       $ 1     $ 2,242        
Issuance of common stock in connection with the acquisition, shares             291,230              
Exercise of stock options 101             101            
Exercise of stock options, shares         33,459                  
Exercise of SARs, shares         109,733                  
Series A convertible preferred stock dividend       $ 37               (37)    
Series A convertible preferred stock dividend, shares       3,769                    
Net (loss) income (4,525)                     (4,684)   159
Foreign currency translation adjustments (728)                   (818)     90
Ending balances at Dec. 31, 2014 308,509     $ 909 $ 70     376,297     (583) (68,137) $ (96) 49
Ending balances, shares at Dec. 31, 2014       90,973 70,109,488               29,990  
Vesting of restricted stock units, shares         227,382                  
Stock-based compensation 4,172             4,172            
Common stock issued as form of payment for MPUs 358             358            
Common stock issued as payment for MPUs, shares         54,801                  
Conversion of Series A convertible preferred stock to common stock 1     $ (588) $ 1     588            
Conversion of Series A convertible preferred stock to common stock, shares       (58,879) 97,935                  
Exercise of stock options 244             244            
Exercise of stock options, shares         50,000                  
Exercise of SARs, shares         74,036                  
Series A convertible preferred stock dividend       $ 36               (36)    
Series A convertible preferred stock dividend, shares       3,665                    
Net (loss) income (12,999)                     (13,251)   252
Foreign currency translation adjustments (529)                   (591)     62
Ending balances at Dec. 31, 2015 $ 299,756     $ 357 $ 71     $ 381,659     $ (1,174) $ (81,424) $ (96) $ 363
Ending balances, shares at Dec. 31, 2015       35,759 70,613,642               29,990