Subsequent Events - Additional Information (Detail) (USD $)	12 Months Ended	1 Months Ended	3 Months Ended
	Mar. 31, 2013	Apr. 30, 2013 Subsequent Event	Jun. 30, 2013 Subsequent Event
Subsequent Event [Line Items]
Proceeds from issuance of private placement	$ 4,000,000		$ 2,260,000
Executed to sell additional shares in private placement		550,000
Expected to be received additional shares amount		$ 102,000