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Patents
 3 Months Ended
Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Patents

3. Patents

The Company performs intangible asset impairment analysis at least annually or whenever circumstances or events indicate such assets might be impaired. The Company would recognize an impairment charge in the event the net book value of such assets exceeded the future undiscounted cash flows attributable to such assets.

Management completed an analysis of the Company's patents as of December 31, 2013. Based on that analysis, the Company concluded that no impairment of the carrying value of the patents existed. The Company believes that no events or circumstances changed during the three months ended March 31, 2014 that would impact this conclusion.

Amortization of patent costs was $89 for the three months ended March 31, 2014 and $92 for the three months ended March 31, 2013, respectively.

Intangible Assets

The following table summarizes intangible assets:

Amortizable intangible assets:March 31, 2014December 31, 2013
Carrying
Amount		Accumulated
Amortization		Carrying
Amount		Accumulated
Amortization
Patents
$
6,745
$
(5,544)
$
6,745
$
(5,455)