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Accrued Liabilities (Tables)
12 Months Ended
Dec. 31, 2016
Payables and Accruals [Abstract]  
Schedule of Accrued Current Liabilities
Accrued current liabilities consisted of the following (in thousands):
 
 
At December 31,
 
2016
 
2015
 
 
 
 
Accrued payroll and related benefits
$
522

 
$
1,243

Accrued sales commissions and incentives
325

 
1,005

Accrued warranty expense
331

 
314

Accrued severance
328

 
96

Accrued legal and professional fees
63

 
151

Accrued other expenses
107

 
108

Total accrued liabilities
$
1,676

 
$
2,917