Goodwill	12 Months Ended
Dec. 31, 2011
Goodwill [Abstract]
Goodwill	Goodwill Goodwill has been recorded within a reporting unit of the Company’s DIS segment since the acquisition of net assets from Ultrascan. As a result of the Company’s annual impairment test during the fourth quarter of 2008, the Company recorded a $2.5 million impairment loss due to a significant decline in its market capitalization, adjusting goodwill to its current carrying value of $0.2 million. The Company determined the implied fair value of its goodwill utilizing the discounted cash flow method under the income approach. Under the income approach, the Company 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 2011 goodwill impairment test, the Company assessed the relevant qualitative factors and concluded that it is more likely than not that the fair values of our goodwill is greater than the carrying amount. After reaching this conclusion, no further testing was performed. The qualitative factors the Company considered included, but were not limited to, general economic conditions, the industry outlook, the Company's recent and forecasted financial performance and the price of the Company's common stock. No impairment loss was recorded in 2011, 2010 and 2009.

Goodwill

Goodwill has been recorded within a reporting unit of the Company’s DIS segment since the acquisition of net assets from Ultrascan. As a result of the Company’s annual impairment test during the fourth quarter of 2008, the Company recorded a $2.5 million impairment loss due to a significant decline in its market capitalization, adjusting goodwill to its current carrying value of $0.2 million. The Company determined the implied fair value of its goodwill utilizing the discounted cash flow method under the income approach. Under the income approach, the Company 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 2011 goodwill impairment test, the Company assessed the relevant qualitative factors and concluded that it is more likely than not that the fair values of our goodwill is greater than the carrying amount. After reaching this conclusion, no further testing was performed. The qualitative factors the Company considered included, but were not limited to, general economic conditions, the industry outlook, the Company's recent and forecasted financial performance and the price of the Company's common stock. No impairment loss was recorded in 2011, 2010 and 2009.