Goodwill (Notes)	12 Months Ended
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill Goodwill has been recorded related to the acquisition of Ultrascan in 2007 and the acquisition of Telerhythmics in 2014. The related goodwill has been recorded within two separate reporting units within our Diagnostic Services segment. As a result of our annual impairment test during the fourth quarter of 2008, we recorded a $2.5 million impairment loss on the goodwill related to the Ultrascan acquisition, adjusting the related goodwill to its implied carrying value of $0.2 million. During the year ended December 31, 2014, we recorded $1.2 million of goodwill as a result of acquisition of Telerhythmics, bringing total goodwill to its current carrying value of $1.3 million. We determined the implied fair value of the goodwill for Telerhythmics 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. During the fourth quarter of 2014, we performed our annual goodwill impairment test. We performed a qualitative assessment of all reporting units to estimate whether it is more likely than not that the fair value of each reporting unit was less than its carrying amount. In performing this qualitative assessment, we assessed relevant events and circumstances that may impact the fair value and the carrying amount of each reporting unit. Factors that were considered included, but were not limited to, the following: (1) macroeconomic conditions; (2) industry and market conditions; (3) overall financial performance and expected financial performance; (4) other entity specific events. Based on the results of this qualitative assessment, we determined that it is more likely than not that the carrying value of the Ultrascan related reporting unit is less than its fair value and, thus, the two-step quantitative analysis was not required. In regards to the Telerhythmics related reporting unit, we performed the first step of the goodwill impairment test which involves comparing the fair value of the reporting unit with the associated carrying value, including goodwill. We determined the fair value of the reporting unit using the income valuation approach. The reporting unit’s fair value exceeded the associated carrying amount of the reporting unit; therefore the second step of the goodwill impairment test was not necessary. No impairment loss was recorded for the years ended December 31, 2014, 2013, or 2012.

Goodwill

Goodwill has been recorded related to the acquisition of Ultrascan in 2007 and the acquisition of Telerhythmics in 2014. The related goodwill has been recorded within two separate reporting units within our Diagnostic Services segment. As a result of our annual impairment test during the fourth quarter of 2008, we recorded a $2.5 million impairment loss on the goodwill related to the Ultrascan acquisition, adjusting the related goodwill to its implied carrying value of $0.2 million. During the year ended December 31, 2014, we recorded $1.2 million of goodwill as a result of acquisition of Telerhythmics, bringing total goodwill to its current carrying value of $1.3 million. We determined the implied fair value of the goodwill for Telerhythmics 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.

During the fourth quarter of 2014, we performed our annual goodwill impairment test. We performed a qualitative assessment of all reporting units to estimate whether it is more likely than not that the fair value of each reporting unit was less than its carrying amount. In performing this qualitative assessment, we assessed relevant events and circumstances that may impact the fair value and the carrying amount of each reporting unit. Factors that were considered included, but were not limited to, the following: (1) macroeconomic conditions; (2) industry and market conditions; (3) overall financial performance and expected financial performance; (4) other entity specific events. Based on the results of this qualitative assessment, we determined that it is more likely than not that the carrying value of the Ultrascan related reporting unit is less than its fair value and, thus, the two-step quantitative analysis was not required. In regards to the Telerhythmics related reporting unit, we performed the first step of the goodwill impairment test which involves comparing the fair value of the reporting unit with the associated carrying value, including goodwill. We determined the fair value of the reporting unit using the income valuation approach. The reporting unit’s fair value exceeded the associated carrying amount of the reporting unit; therefore the second step of the goodwill impairment test was not necessary. No impairment loss was recorded for the years ended December 31, 2014, 2013, or 2012.