Income from Operations Before Income Taxes (Detail) (USD $)	3 Months Ended								9 Months Ended		12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2011
Schedule of Income Before Income Tax [Line Items]
Domestic											$ 11,175,638	$ (1,845,024)	$ (43,509)
Foreign											95,768	248,143
Income (loss) before income taxes	$ 6,418,000	$ 1,790,000	$ 1,778,000	$ 1,285,000	$ (2,146,000)	$ 605,000	$ (55,000)	$ (2,030,000)	$ (1,596,881)	$ 1,987,178	$ 11,271,406	$ (1,596,881)	$ (43,509)