Goodwill and Intangible Assets Net - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	9 Months Ended
	Aug. 31, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Dispose, impair or recognition of additional goodwill		$ 0	$ 0
Goodwill		1,316,000	1,316,000		1,316,000	[1]
Impairment charges on goodwill	0
Impairment losses recognized related to the acquired intangible assets		0		0
Annual amortization expense of the intangible assets, 2014 (remaining three months)		50,000	50,000
Annual amortization expense of the intangible assets, 2015		200,000	200,000
Annual amortization expense of the intangible assets, 2016		200,000	200,000
Annual amortization expense of the intangible assets, 2017		200,000	200,000
Annual amortization expense of the intangible assets, 2018		200,000	200,000
Annual amortization expense of the intangible assets, 2019		200,000	200,000
Annual amortization expense of the intangible assets, 2020		$ 100,000	$ 100,000

[1] The financial information in this column was derived from audited financial statements included in the Company's 2013 Annual Report on Form 10-K.