Goodwill (Notes)	12 Months Ended
Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill Goodwill has been recorded within a reporting unit of our DIS segment since the acquisition of net assets from Ultrascan. As a result of our annual impairment test during the fourth quarter of 2008, we recorded a $2.5 million impairment loss due to a significant decline in our market capitalization, adjusting goodwill to its current carrying value of $0.2 million. We determined the implied fair value of our goodwill utilizing the discounted cash flow method under the income approach. Under the income approach, we derived the fair value based on the present value of estimated future cash flows, which were based on historical data and assumptions pertaining to the market. In performing the 2013 goodwill impairment test, we assessed the relevant qualitative factors and concluded that it is more likely than not that the fair value of our goodwill is greater than the carrying amount. After reaching this conclusion, no further testing was performed. The qualitative factors we considered included, but were not limited to, general economic conditions, the industry outlook, our recent and forecasted financial performance and the price of our common stock. No impairment loss was recorded in 2013, 2012 or 2011.

Goodwill

Goodwill has been recorded within a reporting unit of our DIS segment since the acquisition of net assets from Ultrascan. As a result of our annual impairment test during the fourth quarter of 2008, we recorded a $2.5 million impairment loss due to a significant decline in our market capitalization, adjusting goodwill to its current carrying value of $0.2 million. We determined the implied fair value of our goodwill utilizing the discounted cash flow method under the income approach. Under the income approach, we derived the fair value based on the present value of estimated future cash flows, which were based on historical data and assumptions pertaining to the market. In performing the 2013 goodwill impairment test, we assessed the relevant qualitative factors and concluded that it is more likely than not that the fair value of our goodwill is greater than the carrying amount. After reaching this conclusion, no further testing was performed. The qualitative factors we considered included, but were not limited to, general economic conditions, the industry outlook, our recent and forecasted financial performance and the price of our common stock. No impairment loss was recorded in 2013, 2012 or 2011.