Investment in Marketable Securities and Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2014

Investments in Marketable Securities and Fair Value of Financial Instruments [Abstract]

Schedule of investment in marketable securities and fair value of financial instruments [Table Text Block]

	Cost		Fair Value		Unrealized Gain*
United States Treasury Notes (matures in December, 2015)	$	9,969	$	9,986	$	17

* Included in other comprehensive income.