Computation of Basic and Diluted Earnings Per Share (Detail) (USD $)	3 Months Ended								12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2014	Mar. 31, 2013
Basic
Net earnings	$ 389,440	$ 487,468	$ 27,659	$ 808,359	$ 1,249,571	$ 1,150,058	$ 1,644,329	$ 2,091,854	$ 1,712,926	$ 6,135,812
Weighted average common shares									6,799,444	6,799,444
Dilutive
Net earnings	$ 389,440	$ 487,468	$ 27,659	$ 808,359	$ 1,249,571	$ 1,150,058	$ 1,644,329	$ 2,091,854	$ 1,712,926	$ 6,135,812
Weighted average common shares and common share equivalents									6,799,444	6,799,444