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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table presents a reconciliation of basic and diluted loss per share computations (in thousands, except per share amounts):
 
 
For the year ended December 31,
 
2018
 
2017
 
2016
Numerator:
 
 
 
 
 
Loss from continuing operations
$
(9,111
)
 
$
(11,267
)
 
$
(16,875
)
Loss from discontinued operations
—

 
—

 
(12
)
Net loss
$
(9,111
)
 
$
(11,267
)
 
$
(16,887
)
 
 
 
 
 
 
Denominator:
 
 
 
 
 
Basic weighted average common shares outstanding
11,997

 
11,806

 
11,673

Potential common shares from options and warrants
—

 
—

 
—

Diluted weighted average shares
11,997

 
11,806

 
11,673
Schedule of Warranty Activity
The warranty activity for the respective years is as follows (in thousands):
  
 
At December 31,
 
2018
 
2017
 
 
 
 
Balance at the beginning of the year
$
174

 
$
331

Accruals for warranties issued
51

 
196

Adjustments to existing warranties
103

 
(87
)
Settlements made during the year (in kind)
(70
)
 
(266
)
Accrued warranty expense
$
258

 
$
174