Letter of Credit Agreement (Details) (Letter of credit agreement, Richard Kiphart, USD $)	0 Months Ended
	Dec. 07, 2012
Letter of Credit Agreement
Aggregate borrowing capacity	$ 1,000,000
Number of business days from receipt of Mr. Kiphart's written demand to pay indemnification, fees and expenses	10 days
Warrant issued to purchase shares of common stock (in shares)	275,000
Exercise price of warrant to purchase shares of common stock (in dollars per share)	$ 0.51
Warrant term	3 years
Fair value of warrant at date of issuance	$ 56,000
Minimum
Letter of Credit Agreement
Number of letters of credit issued	1