Fair Value Measurements (Details)	12 Months Ended
	Dec. 31, 2015 USD ($)
Fair Value Measurements Using Unadjusted Quoted Market Prices (Level 1) Equity Securities
Balance at December 31, 2013	$ 21,320
Total gains or losses Included in earnings (or changes in net assets)	1,303
Purchases, issuances, sales, and settlements
Purchases	18,846
Issuances	0
Sales	(35,637)
Settlements	0
Balance at December 31, 2014	5,832
Total gains or losses Included in earnings (or changes in net assets)	(11,442)
Purchases, issuances, sales, and settlements:
Purchases	1,061
Issuances	50,063
Sales	(8,013)
Settlements	0
Balance at December 31, 2015	37,500
Fair Value Measurements Using Quoted Prices for Identical or Similar Assets in Active Markets (Level 2) Other Investment
Balance at December 31, 2013	10,000
Total gains or losses Included in earnings (or changes in net assets)	1,410
Settlements	(1,150)
Balance at December 31, 2014	10,260
Total gains or losses Included in earnings (or changes in net assets)	(10,260)
Balance at December 31, 2015	0
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Equity Options
Total gains or losses Included in earnings (or changes in net assets)	(49,834)
Issuances	49,834
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Equity Funding Agreements
Balance at December 31, 2013	55,943
Balance at December 31, 2014	55,943
Balance at December 31, 2015	$ 55,943