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Investments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Summary of investments
Cost	$ 105,597,085	$ 53,327,364
Gross Unrealized Gains	5,046,350	2,737
Gross Unrealized Losses	(240,243)	(254,127)
Fair Market Value	110,403,192	53,075,974
Mutual funds
Summary of investments
Cost	78,571,294	29,487,758
Gross Unrealized Gains	435	2,667
Gross Unrealized Losses	(185,737)	(216,790)
Fair Market Value	78,385,992	29,273,635
US corporate debt securities
Summary of investments
Cost	26,923,855	23,839,606
Gross Unrealized Gains	0	70
Gross Unrealized Losses	(54,452)	(37,337)
Fair Market Value	26,869,403	$ 23,802,339
Municipal bonds
Summary of investments
Cost	101,936
Gross Unrealized Gains	0
Gross Unrealized Losses	(54)
Fair Market Value	101,882
Investemnt in affiliated entity - PLS
Summary of investments
Cost	0
Gross Unrealized Gains	5,045,915
Gross Unrealized Losses	0
Fair Market Value	$ 5,045,915
Maximum | US corporate debt securities
Summary of investments
Contractual Maturity (less than 1 year)	2 years
Maximum | Municipal bonds
Summary of investments
Contractual Maturity (less than 1 year)	1 year

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