Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

Financial assets and liabilities included in our financial statements and measured at fair value are classified based on the valuation technique level in the table below:

	As of December 31, 2013
		Total		Level 1		Level 2		Level 3
Description:
Cash and cash equivalents (1)	$	45,443,759	$	45,443,759	$	—	$	—
Restricted cash (1)		1,301,000		1,301,000		—		—
Marketable securities (2)		13,097,735		11,517,735		—		1,580,000
Total at fair value	$	59,842,494	$	58,262,494	$	—	$	1,580,000

	As of December 31, 2012
		Total		Level 1		Level 2		Level 3
Description:
Cash and cash equivalents (1)	$	23,845,360	$	23,845,360	$	—	$	—
Restricted cash (1)		1,301,000		1,301,000		—		—
Marketable securities (2)		35,394,318		33,854,318		—		1,540,000
Total at fair value	$	60,540,678	$	59,000,678	$	—	$	1,540,000

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following table provides a reconciliation of the beginning and ending balance for the Company’s marketable securities measured at fair value using significant unobservable inputs (Level 3):

	Marketable
	Securities
Balance December 31, 2011	$	1,410,000
Increase in fair value of investment		130,000
Balance December 31, 2012		1,540,000
Increase in fair value of investment		40,000
Balance December 31, 2013	$	1,580,000