Subsequent Events - Additional Information (Detail) (USD $)	3 Months Ended			0 Months Ended	1 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	May 05, 2014 Subsequent Event [Member]	May 31, 2014 Subsequent Event [Member]	May 15, 2014 Subsequent Event [Member]
Subsequent Event [Line Items]
Dividend declared per share				$ 0.045
Shares outstanding	10,451,678		10,451,678			10,487,511
Dividend paid	$ 1,410,978	$ 1,131,717			$ 471,938
Dividend payable record date				May 15, 2014