Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2017 USD ($) Segment shares	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Federal Deposit Insurance Corporation protection limits | $	$ 250,000
Un-amortized franchise fees | $	366,030		$ 386,612
Amortization expense | $	31,452	$ 15,131
Lease revenue | $	500,000	500,000
Deferred income taxes | $	6,831,290		6,949,340
Deferred tax assets related to net operating losses | $	$ 5,900,000		6,000,000
Minimum percentage of likelihood of realization of deferred tax assets	50.00%
Deferred tax assets valuation allowance | $	$ 0
Uncertain tax positions | $	0		$ 0
Compensation cost recognized | $	94,140	196,742
Advertising cost | $	65,010	74,063
Gain on involuntary conversion of assets | $	$ 1,041,815
Number of reportable segment | Segment	1
2004 Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Shares issued under plan | shares	337,438
Termination year of stock based compensation plan	2013
Stock based compensation plan termination date	Apr. 30, 2013
2004 Plan [Member] | Executives and Employees [Member]
Summary Of Significant Accounting Policies [Line Items]
Shares issued under plan | shares	255,938
2004 Plan [Member] | Director [Member]
Summary Of Significant Accounting Policies [Line Items]
Shares issued under plan | shares	81,500
Stock-based Compensation , Number of Shares, Vested | shares	81,500
2004 Plan [Member] | Chief Financial Officer [Member]
Summary Of Significant Accounting Policies [Line Items]
Shares issued but not vested | shares	6,000
2013 Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Shares issued under plan | shares	121,100
Performance-based stock awards granted | shares	0
2013 Plan [Member] | Executives and Employees [Member]
Summary Of Significant Accounting Policies [Line Items]
Shares issued under plan | shares	74,600
2013 Plan [Member] | Director [Member]
Summary Of Significant Accounting Policies [Line Items]
Shares issued under plan | shares	46,500
Shares issued but not vested | shares	12,000
2004 and 2013 Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Compensation cost recognized | $	$ 94,140	$ 196,742
Maximum [Member] | 2004 Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Restricted and performance stock awards permitted to grant to employees | shares	350,000
Maximum [Member] | 2013 Plan [Member]
Summary Of Significant Accounting Policies [Line Items]
Restricted and performance stock awards permitted to grant to employees | shares	750,000
Buildings and Improvements [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	7 years
Buildings and Improvements [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	39 years
Furniture, Fixtures and Equipment [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	3 years
Furniture, Fixtures and Equipment [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	10 years