Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2012

Fair Value Measurements [Abstract]

Schedule of fair value assumptions

The fair value of the contingent purchase consideration liabilities at June 30, 2012 and December 31, 2011 was valued using the Monte Carlo simulation method, which is based on valuation theories underlying the Black-Scholes Merton model. Estimated probabilities related to achieving the earn-out milestones were incorporated into our valuation. In addition, our valuation incorporates the following assumptions:

	June 30,			December 31,
	2012			2011
Risk-free interest rate		0.337	%		0.410	%
Expected volatility based on the (High - Low) / (High + Low) method		75	%		75	%
Expected life	4 years			4 years
Expected dividend yield		0	%		0	%

Fair value hierarchy for assets and liabilities measured at fair value

The following tables present the fair value hierarchy for those assets and liabilities measured at fair value on a recurring basis at June 30, 2012 and December 31, 2011:

	June 30, 2012
	Fair Value Measurements
	Level 1		Level 2		Level 3		Total Fair Value
Assets
Available-for-sale securities	$	2,401	$	-	$	-	$	2,401
Liabilities
Contingent purchase price consideration, current (see Note 3)	$	-	$	-	$	1,229,908	$	1,229,908
Contingent purchase price consideration, noncurrent (see Note 3)		-		-		2,522,614		2,522,614
	December 31, 2011
	Fair Value Measurements
	Level 1		Level 2		Level 3		Total Fair Value
Assets
Available-for-sale securities	$	2,229	$	-	$	-	$	2,229
Liabilities
Contingent purchase consideration (see Note 3)	$	-	$	-	$	3,359,089	$	3,359,089