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Medical Equipment and Property - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified |
1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|---|
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Jun. 30, 2014
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Sep. 30, 2014
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Mar. 31, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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Dec. 31, 2013
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| Property, Plant and Equipment [Line Items] | |||||||
| Depreciation expense for medical equipment | $ 0.9 | $ 1.3 | $ 2.4 | $ 3.8 | |||
| Estimated useful life of medical equipment | 7 years | 5 years | |||||
| Change in estimated useful lives, decrease in depreciation | 0.4 | 1.4 | |||||
| Change in estimated useful lives, decrease in net income after tax | 0.2 | 0.8 | |||||
| Change in estimated useful lives, basic and diluted income per share | $ 0 | ||||||
| Depreciation expense for property and equipment (other than medial equipment) recorded in general and administrative expenses | 0.1 | 0.1 | 0.2 | 0.2 | |||
| Payment for remaining equipment | 0.5 | ||||||
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Pre-Owned Equipment [Member]
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| Property, Plant and Equipment [Line Items] | |||||||
| Medical equipment held for sale or rental - financial institution | $ 0.8 | ||||||