Fair Value Measurements Fair value hierarchy the Company’s financial assets and liabilities (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition-related contingent consideration	$ 7,550,000	$ 3,130,000
Business Acquisition, Contingent Consideration, at Fair Value		70,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market investments		2,497,400
Embedded derivative liabilities		0
Warrant Derivative Liabilities	0	0
Contingent Consideration Classified As Equity Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market investments		0
Embedded derivative liabilities		0
Warrant Derivative Liabilities	0	0
Contingent Consideration Classified As Equity Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market investments		0
Embedded derivative liabilities		391,700
Warrant Derivative Liabilities	101,200	82,700
Contingent Consideration Classified As Equity Fair Value Disclosure	$ 7,550,000	$ 3,130,000