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Supplementary Financial Information to Item 8. (Tables)
 12 Months Ended
Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]  
Schedule of Quarterly Financial Data
2017
 
Fourth
Quarter
 
Third
Quarter
 
Second
Quarter
 
First
Quarter
Net sales from continuing operations
 
$
4,727

 
$
5,002

 
$
6,011

 
$
4,106

Gross profit from continuing operations
 
1,622

 
1,137

 
1,501

 
561

Net loss from continuing operations
 
(1,858
)
 
(1,773
)
 
(3,114
)
 
(4,522
)
Net loss from discontinued operations
 
—

 
—

 
—

 
—

Net loss
 
$
(1,858
)
 
$
(1,773
)
 
$
(3,114
)
 
$
(4,522
)
Net loss per share (basic and diluted):
 
 
 
 
 
 
 
 
Net loss from continuing operations
 
$
(0.16
)
 
$
(0.15
)
 
$
(0.26
)
 
$
(0.39
)
Net loss from discontinued operations
 
—

 
—

 
—

 
—

Net loss
 
$
(0.16
)
 
$
(0.15
)
 
$
(0.26
)
 
$
(0.39
)
 
2016
 
Fourth
Quarter
 
Third
Quarter
 
Second
Quarter
 
First
Quarter
Net sales from continuing operations
 
$
7,186

 
$
8,261

 
$
7,126

 
$
8,425

Gross profit from continuing operations
 
(1,072
)
 
3,082

 
2,522

 
3,145

Net loss from continuing operations
 
(7,805
)
 
(3,177
)
 
(3,916
)
 
(1,977
)
Net loss from discontinued operations
 
—

 
—

 
—

 
(12
)
Net loss
 
$
(7,805
)
 
$
(3,177
)
 
$
(3,916
)
 
$
(1,989
)
Net loss per share (basic and diluted):
 
 
 
 
 
 
 
 
Net loss from continuing operations
 
$
(0.67
)
 
$
(0.27
)
 
$
(0.34
)
 
$
(0.17
)
Net loss from discontinued operations
 
—

 
—

 
—

 
—

Net loss
 
$
(0.67
)
 
$
(0.27
)
 
$
(0.34
)
 
$
(0.17
)