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Segment Reporting (Tables)
9 Months Ended
Sep. 30, 2016
Segment Reporting [Abstract]  
Schedule of operations by geographic segment
 
 
Sales Originating From
Three months ended September 30, 2016
 
Americas
 
Europe and
Asia
 
Total
Mobile communication sales to the United States
 
$
25,093

 
$
708

 
$
25,801

Mobile communication sales to Canada
 
166

 
75

 
241

Mobile communication sales to Europe
 
123

 
6,179

 
6,302

Mobile communication sales to other geographic areas
 
643

 
3,467

 
4,110

Guidance and stabilization sales to the United States
 
2,720

 

 
2,720

Guidance and stabilization sales to Canada
 
4,768

 

 
4,768

Guidance and stabilization sales to Europe
 
659

 

 
659

Guidance and stabilization sales to other geographic areas
 
1,245

 

 
1,245

Intercompany sales
 
539

 
754

 
1,293

Subtotal
 
35,956

 
11,183

 
47,139

Eliminations
 
(539
)
 
(754
)
 
(1,293
)
Net sales
 
$
35,417

 
$
10,429

 
$
45,846

Segment net income
 
$
553

 
$
2,310

 
$
2,863

Depreciation and amortization
 
$
1,140

 
$
1,695

 
$
2,835

Total assets
 
$
136,175

 
$
77,521

 
$
213,696

 
 
Sales Originating From
Three months ended September 30, 2015
 
Americas
 
Europe and
Asia
 
Total
Mobile communication sales to the United States
 
$
22,755

 
$
361

 
$
23,116

Mobile communication sales to Canada
 
326

 
29

 
355

Mobile communication sales to Europe
 
113

 
4,937

 
5,050

Mobile communication sales to other geographic areas
 
1,607

 
7,461

 
9,068

Guidance and stabilization sales to the United States
 
2,425

 

 
2,425

Guidance and stabilization sales to Canada
 
2,424

 

 
2,424

Guidance and stabilization sales to Europe
 
1,200

 

 
1,200

Guidance and stabilization sales to other geographic areas
 
817

 

 
817

Intercompany sales
 
1,198

 
1,137

 
2,335

Subtotal
 
32,865

 
13,925

 
46,790

Eliminations
 
(1,198
)
 
(1,137
)
 
(2,335
)
Net sales
 
$
31,667

 
$
12,788

 
$
44,455

Segment net (loss) income
 
$
(728
)
 
$
265

 
$
(463
)
Depreciation and amortization
 
$
1,211

 
$
1,984

 
$
3,195

Total assets
 
$
143,297

 
$
87,795

 
$
231,092