Quarterly Financial Data (Unaudited) (Quarterly Financial Information Presents The Results Of Operations) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Total Income (Loss)	$ 2,450,824	$ (352,278)	$ (2,870,767)	$ 5,182,801	$ (3,465,367)	$ 3,406,724	$ 2,309,257	$ (6,713,578)	$ 4,410,580	$ (4,462,964)	$ (14,049,872)
Total Expenses	104,839	94,831	100,767	121,121	143,630	122,485	94,598	74,018	421,558	434,731	408,791
Expense Waivers	(37,562)	(30,231)	(18,323)	(14,464)	(26,148)	(13,434)	(12,614)	(16,307)	(100,580)	(68,503)	(113,169)
Net Expenses	67,277	64,600	82,444	106,657	117,482	109,051	81,984	57,711	320,978	366,228	295,622
Net income (loss)	$ 2,383,547	$ (416,878)	$ (2,953,211)	$ 5,076,144	$ (3,582,849)	$ 3,297,673	$ 2,227,273	$ (6,771,289)	$ 4,089,602	$ (4,829,192)	$ (14,345,494)
Net Income (Loss) per Share	$ 1.41	$ (0.30)	$ (2.07)	$ 2.05	$ (1.45)	$ 1.30	$ 1.01	$ (4.84)	$ 1.09	$ (3.98)	$ (13.81)