Concentration of Credit Risk	6 Months Ended
Jun. 30, 2011
Concentration of Credit Risk [Abstract]
Concentration of Credit Risk	3. Concentration of Credit Risk The Company's revenue is primarily generated in the United States. Changes in economic conditions, government regulations or demographic trends, among other matters, in the United States could adversely affect the Company's revenue and results of operations. The Company maintains its cash and cash equivalent balances in either insured depository accounts or money market mutual funds. The money market mutual funds are limited to investments in low-risk securities such as United States or government agency obligations, or repurchase agreements secured by such securities.

Description of any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. The entity should inform financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. Disclosure of any financial instrument credit risk concentration also should indicate the maximum amount of loss that would be incurred upon complete failure of the counterparty to perform and the entity's collateral policies or other policies that limit the loss exposure. This element may be used as a single block of text to encapsulate the entire disclosure including data and tables.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 94-6
-Paragraph 21, 22, 24

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