Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($)		6 Months Ended		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, beginning		190,419
Granted, shares		7,500	7,000
Forfeited, shares		0
Exercised, shares		0
Expired, shares		(7,734)
Options outstanding and exercisable, ending		190,185		190,419
Options outstanding, beginning, Weighted Average Exercise Price		$ 7.02
Granted, Weighted Average Exercise Price		5.37
Forfeited, Weighted Average Exercise Price		0
Exercised, Weighted Average Exercise Price		0
Expired, Weighted Average Exercise Price		14.43
Options outstanding and exercisable, ending, Weighted Average Exercise Price		$ 6.66		$ 7.02
Options outstanding and exercisable, ending, Weighted Average Remaining Contractual Life		6 years 1 month 6 days		6 years 2 months 12 days
Options outstanding, ending, Aggregate Intrinsic Value	[1]			$ 0
Options outstanding and exercisable, ending, Aggregate Intrinsic Value	[1]	$ 94,373

[1] The aggregate intrinsic value of a stock option in the table above represents the total pre-tax intrinsic value (the amount by which the current market value of the underlying stock exceeds the exercise price of the option) that would have been received by the option holders had all option holders exercised their options on June 30, 2015. This amount changes based on changes in the market value of the Company's common stock.