Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2014

Accounting Policies [Abstract]

Changes in warranty reserve

During the three months ended March 31, 2014 and 2013, changes in the warranty reserve consist of the following:

	Three Months
	2014			2013
Accrued warranty reserve, beginning of year	$	638		$	549
Estimated warranty expense	383			108
Amounts charged against warranty reserve	(188		)	(204		)
Accrued warranty reserve, end of period	$	833		$	453

Reconciliation of net loss and weighted averages shares outstanding for the calculation of basic and diluted loss per share

The following table represents a reconciliation of the net loss and weighted average shares outstanding for the calculation of basic and diluted loss per share for the three months ended March 31, 2014 and 2013:

	Three Months
	2014			2013
Numerator:
Basic and diluted net loss	$	(1,926	)	$	(4,759	)
Denominator:
Basic and diluted weighted average shares outstanding	21,929,852			12,654,466