Subsequent Events- Additional Information (Detail) (USD $)	3 Months Ended	1 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 Stock Awards Issued
Subsequent Event [Line Items]
Options granted, shares	125,000	263,572
Options granted, fair value		$ 451,915
Options granted, weighted average exercise price	$ 2.34	$ 1.75
Restricted stock issued, shares		78,571
Restricted stock issued, fair value per-share		$ 1.75