Schedule II-Valuation and Qualifying Accounts (Details) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Movement in Valuation Allowances and Reserves [Roll Forward]
Dental office acquisitions					$ 81,000
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	301,945		315,333		371,762
Charged to cost and expenses	579,419		627,713		574,688	[1]
Deductions	577,454	[2]	641,101	[2]	631,117	[2]
Balance at end of period	$ 303,910		$ 301,945		$ 315,333

[1] Approximately $81,000 of this amount is related to one of the dental Office acquisitions.

[2] Charges to the account are for the purpose for which the reserves were created.