Credit Facilities and Long-Term Debt - Notes Payable - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Term loan amortized per quarter	$ 125,000
Bank Of America [Member]
Debt Instrument [Line Items]
Weighted average interest rate on term loan	2.15%	2.19%	2.14%
Interest Expense, Debt	200,727	215,593	56,226
Allstate Or Cuna [Member] | Senior Unsecured Note [Member]
Debt Instrument [Line Items]
Interest Expense, Debt	800,800	800,800	800,800
Sun Life Assurance Company Of Canada [Member]
Debt Instrument [Line Items]
Interest Expense, Debt	824,969	824,969	824,969
Sun Life Assurance Company Of Canada [Member] | Senior Secured Guaranteed Floating Rate [Member]
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.10%	4.13%	4.31%
Interest Expense, Debt	40,900	123,850	129,200
Sun Life Assurance Company Of Canada [Member] | Senior Secured Guaranteed Note [Member]
Debt Instrument [Line Items]
Interest Expense, Debt	$ 123,007	$ 123,007	$ 23,576