Summary of Status of Company's Stock Option Plan (Detail) (USD $)	6 Months Ended			12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Stock Option Plan	Dec. 31, 2013 Stock Option Plan
Shares
Outstanding at beginning of period			2,517,911	3,348,935
Cancelled				(58,617)
Exercised			(20,000)	(945,761)
Granted	10,000	50,000	10,000	173,354
Outstanding at end of period			2,507,911	2,517,911
Weighted Average Exercise Price
Outstanding at beginning of period			$ 1.33	$ 1.23
Cancelled				$ 1.87
Exercised			$ 1.18	$ 1.20
Granted			$ 2.73	$ 2.59
Outstanding at end of period			$ 1.33	$ 1.33