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Segment Reporting (Tables)
 6 Months Ended
Jun. 30, 2015
Segment Reporting [Abstract]  
Summary of Segmented Data

    Energy &
Security
Sonar
Solutions		     Smart Grid
Distribution
Automation		     M2M     Other     Total  
Six months ended June 30, 2015                                        
Revenues from external customers   $ 5,748     $ 1,610     $ 1,113     $ 954     $ 9,425  
Intersegment revenues     —       —       —       —       —  
Segment gross profit     1,790       317       634       487       3,228  
Depreciation and amortization     90       113       35       22       260  
Impairments     —       850       —       —       850  
Segment net income (loss) before income taxes     (204 )     (1,893 )     (700 )     13       (2,784 )
                                         
Six months ended June 30, 2014                                        
Revenues from external customers   $ 5,037     $ 2,209     $ 1,056     $ 875     $ 9,177  
Intersegment revenues     —       —       —       —       —  
Segment gross profit     1,145       551       564       446       2,706  
Restructuring and related charges     —       102       77       19       198  
Depreciation and amortization     145       131       35       24       335  
Segment net loss before income taxes     (778 )     (1,778 )     (851 )     (60 )     (3,467 )
                                         
Three months ended June 30, 2015                                        
Revenues from external customers   $ 3,088     $ 702     $ 560     $ 457     $ 4,807  
Intersegment revenues     —       —       —       —       —  
Segment gross profit     1,185       40       294       190       1,709  
Depreciation and amortization     45       56       17       11       129  
Impairments     —       850       —       —       850  
Segment net income (loss) before income taxes     90       (1,568 )     (422 )     (92 )     (1,992 )
                                         
Three months ended June 30, 2014                                        
Revenues from external customers   $ 2,522     $ 1,246     $ 548     $ 407     $ 4,723  
Intersegment revenues     —       —       —       —       —  
Segment gross profit     459       366       252       199       1,276  
Restructuring and related charges     —       102       77       19       198  
Depreciation and amortization     74       66       18       10       168  
Segment net loss before income taxes     (570 )     (805 )     (448 )     (39 )     (1,862 )
Schedule of Reconciliation of Segment Data to Consolidated Statement of Operations

Reconciliation of Segment Income (Loss) to Consolidated Net Loss Before Income Taxes

 

    Six months ended June 30,     Three months ended June 30,  
    2014     2015     2014     2015  
Total net loss before income taxes for reportable segments   $ (3,407 )   $ (2,797 )   $ (1,823 )   $ (1,900 )
Other operational segment net loss before income taxes     (60 )     13       (39 )     (92 )
Total segment net loss before income taxes     (3,467 )     (2,784 )     (1,862 )     (1,992 )
Unallocated cost of corporate headquarters*     (1,985 )     (1,890 )     (942 )     (856 )
Provision for loss – channel partner     (649 )     —       (649 )     —  
Unallocated cost of DSIT headquarters     (88 )     (66 )     (62 )     (77 )
Consolidated loss before income taxes   $ (6,189 )   $ (4,740 )   $ (3,515 )   $ (2,925 )

 

* Includes stock compensation expense of $550 and $376 for the six month periods ended June 30, 2014 and 2015 and $240 and $168 for the three month periods ended June 30, 2014 and 2015, respectively.