Note 3 - Acquisitions (Detail) (USD $)	3 Months Ended		12 Months Ended					57 Months Ended	63 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Mar. 31, 2013	Mar. 31, 2013
Number of Businesses Acquired			3	9	14	11	3	40	40
Business Acquisition, Cost of Acquired Entity, Purchase Price			$ 109,200,000
Business Acquisition, Cost of Acquired Entity, Cash Paid			112,000,000
Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents			2,900,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares)			6,190
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned			85,000
Business Acquisition, Cost of Acquired Entity, Transaction Costs	2,000		1,300,000					2,000	2,000
Business Acquisition, Pro Forma Revenue	140,300,000
Business Acquisition, Pro Forma Net Income (Loss)	6,400,000
Basic Earnings Per Share, Pro Forma (in Dollars per share)	$ 0.19
Depreciation, Depletion and Amortization	16,326,000	14,025,000
Selling, General and Administrative Expense	33,257,000	28,632,000
MedHealth Holdings [Member]
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Parthenia Medical Group [Member]
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Other 2012 Acquisitions [Member]
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount			52,900,000
Business Acquisition Purchase Price Allocation Intangible Assets Expected Tax Deductible Amount			50,200,000
Pro Forma Additional Expenses [Member]
Interest Expense		1,700,000
Depreciation, Depletion and Amortization	3,200,000
Selling, General and Administrative Expense	$ 905,000