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Basis of Presentation and Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 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
September 30,
 
Nine months ended
September 30,
 
2015
 
2014
 
2015
 
2014
Numerator:
 
 
 
 
 
 
 
Income (loss) from continuing operations
$
4,398

 
$
256

 
$
7,814

 
$
(4,181
)
Loss from discontinued operations
(142
)
 
(659
)
 
(318
)
 
(914
)
Net income (loss)
$
4,256

 
$
(403
)
 
$
7,496

 
$
(5,095
)
 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
Basic weighted average common shares outstanding
10,310

 
8,781

 
10,002

 
7,276

Potential common shares from options and warrants
355

 
—

 
340

 
—

Diluted weighted average shares
10,665

 
8,781

 
10,342

 
7,276
Schedule of warranty activity
The following table summarizes warranty activity for the periods presented (in thousands):

 
Three months ended
September 30,
 
Nine months ended
September 30,
 
2015
 
2014
 
2015
 
2014
Balance at beginning of period
$
391

 
$
68

 
$
81

 
$
75

Accruals for warranties issued
—

 
23

 
325

 
27

Settlements made during the period (in cash or in kind)
(2
)
 
(15
)
 
(17
)
 
(26
)
Accrued warranty reserve
$
389

 
$
76

 
$
389

 
$
76