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GEOGRAPHIC AND SEGMENT INFORMATION (Tables)
 12 Months Ended
Dec. 31, 2017
Segment Reporting [Abstract]  
Schedule of reporting information by segment
Summarized financial information with respect to reportable segments is as follows:
 
Year ended December 31, 2017
(In thousands)
Core
 
OEM
 
Advanced Energy
 
Corporate (Other)
 
Total
Sales
$
28,649

 
$
2,598

 
$
7,636

 
$
—

 
$
38,883

 
 
 
 
 
 
 
 
 
 
Income (loss) from operations
8,620

 
1,353

 
(3,957
)
 
(11,281
)
 
(5,265
)
 
 
 
 
 
 
 
 
 
 
Severance and related expense
—

 
—

 
—

 
1,524

 
1,524

Interest expense, net
—

 
—

 
—

 
(136
)
 
(136
)
Change in fair value of derivative liabilities
—

 
—

 
—

 
183

 
183

Income tax benefit
—

 
—

 
—

 
(156
)
 
(156
)
Depreciation and amortization
—

 
—

 
—

 
696

 
696

 
Year ended December 31, 2016
(In thousands)
Core
 
OEM
 
Advanced Energy
 
Corporate (Other)
 
Total
Sales
$
27,808

 
$
5,328

 
$
3,491

 
$
—

 
$
36,627

 
 
 
 
 
 
 
 
 
 
Income (loss) from operations
7,600

 
3,045

 
(4,812
)
 
(9,625
)
 
(3,792
)
 
 
 
 
 
 
 
 
 
 
Severance and related expense
—

 
—

 
—

 
—

 
—

Interest expense, net
—

 
—

 
—

 
(158
)
 
(158
)
Change in fair value of derivative liabilities
—

 
—

 
—

 
64

 
64

Income tax expense
—

 
—

 
—

 
64

 
64

Depreciation and amortization
—

 
—

 
—

 
734

 
734

 
Year ended December 31, 2015
(In thousands)
Core
 
OEM
 
Advanced Energy
 
Corporate (Other)
 
Total
Sales
$
26,098

 
$
2,116

 
$
1,306

 
$
—

 
$
29,520

 
 
 
 
 
 
 
 
 
 
Income (loss) from operations
5,690

 
1,524

 
(4,688
)
 
(9,512
)
 
(6,986
)
 
 
 
 
 
 
 
 
 
 
Severance and related expense
—

 
—

 
—

 
—

 
—

Interest expense, net
—

 
—

 
—

 
(158
)
 
(158
)
Change in fair value of derivative liabilities
—

 
—

 
—

 
1,799

 
1,799

Income tax expense
—

 
—

 
—

 
25

 
25

Depreciation and amortization
—

 
—

 
—

 
812

 
812
Schedule of revenue by product line
Sales for the product lines are summarized as follows:
 
Year Ended December 31,
(In thousands)
2017
 
2016
 
2015
Sales by Product Line
 
 
 
 
 
Electrosurgical
$
25,727

 
$
20,901

 
$
17,558

Cauteries
7,141

 
7,101

 
6,886

Lighting
2,435

 
2,710

 
2,477

Other
3,580

 
5,915

 
2,599

Total
$
38,883

 
$
36,627

 
$
29,520
Schedule of revenue by geographic area
Revenue by geographic region, based on the "ship to" location on the invoice are as follows:
 
Year Ended December 31,
(In thousands)
2017
 
2016
 
2015
Sales by Domestic and International
 
 
 
 
 
Domestic
$
33,147

 
$
32,050

 
$
24,540

International
5,736

 
4,577

 
4,980

Total
$
38,883

 
$
36,627

 
$
29,520