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Basis of Presentation and Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2015
Accounting Policies [Abstract]  
Reconciliation of basic and diluted income (loss) per share
The following is a reconciliation of the numerator and denominator of the basic and diluted net income (loss) per share computations for the periods presented below (in thousands):

 
Three months ended
June 30,
 
Six months ended
June 30,
 
2015
 
2014
 
2015
 
2014
Numerator:
 
 
 
 
 
 
 
Income (loss) from continuing operations
$
2,147

 
$
(622
)
 
$
3,312

 
$
(4,672
)
Loss from discontinued operations
(36
)
 
—

 
(72
)
 
(20
)
Net income (loss)
$
2,111

 
$
(622
)
 
$
3,240

 
$
(4,692
)
 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
Basic weighted average common shares outstanding
10,019

 
7,836

 
9,846

 
6,512

Potential common shares from options and warrants
119

 
—

 
212

 
—

Diluted weighted average shares
10,138

 
7,836

 
10,058

 
6,512
Schedule of warranty activity
The following table summarizes warranty activity for the periods indicated (in thousands):

 
Three months ended
June 30,
 
Six months ended
June 30,
 
2015
 
2014
 
2015
 
2014
Balance at beginning of period
$
503

 
$
75

 
$
188

 
$
75

Accruals for warranties issued
—

 
4

 
352

 
20

Settlements made during the period (in cash or in kind)
(32
)
 
(11
)
 
(69
)
 
(27
)
Accrued warranty reserve
$
471

 
$
68

 
$
471

 
$
68