Revision to Previously Issued Consolidated Financial Statements (Narrative) (Details) (USD $)	3 Months Ended						9 Months Ended	12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Sep. 30, 2012	Dec. 31, 2011
Revisions to Previously Issued Consolidated Financial Statements [Abstract]
Restatement of revenue	$ 7,000	$ 1,100,000	$ 1,900,000	$ (1,800,000)	$ 1,900,000	$ (1,200,000)	$ 3,000,000	$ (1,100,000)
Restatement of net income	400,000	600,000	1,000,000	(900,000)	600,000	(100,000)	2,000,000	(300,000)
Restatement on earnings per share basic	$ 0.01	$ 0.01	$ 0.02	$ (0.01)	$ 0.01	$ (0.01)	$ 0.04	$ (0.01)
Restatement on earnings per share diluted	$ 0.01	$ 0.01	$ 0.01	$ (0.02)	$ 0.01	$ (0.01)	$ 0.03	$ (0.01)
Restatement of Accounts Receivable	(1,500,000)			(3,800,000)			(1,500,000)	(3,800,000)
Restatement of inventory	1,300,000			2,300,000			1,300,000	2,300,000
Restatement of goodwill related to acquisition of NovaMed	$ 1,900,000			$ 1,900,000			$ 1,900,000	$ 1,900,000