Note 6. Fair Value of Measurements (Tables)

6 Months Ended

Jun. 30, 2012

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Total Fair Value on the Balance Sheet		Quoted Prices In Active Markets For Identical Assets  /Liabilities (Level 1)		Significant Other Observable Inputs  (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
As of June 30, 2012
Short-term investments available for sale
Bonds – corporate issuances	$	12,287,271	$	12,287,271	$	−	$	−
As of December 31, 2011
Short-term investments available for sale
Bonds – corporate issuances	$	10,400,905	$	10,400,905	$	−	$	−
Liabilities:
As of June 30, 2012
Notes Payable	$	5,099,333	$	5,099,333	$	−	$	−
Common stock warrant liability		536,121		−		−		536,121
As of December 31, 2011
Notes Payable	$	181,889	$	181,889	$	−	$	−
Common stock warrant liability		166,398		−		−		166,398