Debt - Additional Information (Detail) (USD $)	12 Months Ended			12 Months Ended			12 Months Ended			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2013 Bank Loan [Member]	Dec. 31, 2012 Bank Loan [Member]	Oct. 11, 2006 Bank Loan [Member]	Dec. 31, 2013 Revolver [Member]	Dec. 31, 2012 Revolver [Member]	Oct. 31, 2012 Revolver [Member]	Dec. 31, 2013 Revolver [Member] Base Rate Loan [Member]	Dec. 31, 2013 Revolver [Member] LIBOR Loans [Member]
Debt Instrument [Line Items]
Debt outstanding	$ 0		$ 0
Amount of revolving credit facility									10,000,000
Expiry period of revolver							3 years
Revolving credit facility, interest rate description							LIBOR + 2.00% per annum (for LIBOR loans) or the greater of 1.00% or the bank's prime rate minus 0.50% per annum (for base rate loans)
Base rate loan										1.00%
Commitment fee							50,000
Date of expiry							Oct. 16, 2015
Unused credit facility fee							0.25%
Rate of Base Rate Loans				1.50%						(0.50%)	2.00%
Borrowings under Revolver							0	0
Repayment of Bank Loan	5,690,940	5,531,050			5,690,940
Cash portion used for Merger consideration						$ 25,000,000
Maturity Date				Sep. 30, 2012
Bank loan interest rate, description				The interest rate during 2012 was LIBOR + 1.50%