Business Combination - Additional Information (Detail) (Meridian [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Meridian [Member]
Loans At Acquisition Date [Line Items]
Total fair value of the purchase price consideration	$ 2,800,000
Initial cash consideration paid	1,600,000
Purchase price of business acquisition	1,750,000
Net working capital adjustment	164,000
Increase of cash consideration paid by the Company	1,200,000
Additional possible earnings based on financial performance	2,800,000
Selling and administrative expense		$ 231,000	$ 1,100,000