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Note 1 - Summary of Significant Accounting Policies (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Provision for Doubtful Accounts (in Dollars)	$ 2,455,000	$ 2,430,000	$ 2,256,000
Caris [Member]
Equity Method Investment, Ownership Percentage	75.10%
Building and Building Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	20 years
Building and Building Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	40 years
Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	15 years
Percent of Revenues Derived From Medicare, Medicaid, and Other Government Programs [Member]
Concentration Risk, Percentage	67.00%
Medicare and Medicaid [Member]
Liabilities Subject to Compromise, End of Period (in Dollars)	$ 17,001,000

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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