Condensed Consolidated Statements of Cash Flows (Parenthetical)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Condensed Statements of Cash Flows
Issuance of shares of common stock to fund the Company's 401(k) matching contribution	30,534	32,872
Conversion of accrued expenses into 34,442 and 34,336 shares of common stock in connection with the Company's Employee Stock Purchase Plan for 2013 and 2012, respectively.	34,442	34,336