Commitments - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended	0 Months Ended
	Jul. 07, 2011	Apr. 19, 2010	Jul. 07, 2011 Medical Device Assembly	Jul. 07, 2011 Warehousing	Dec. 05, 2011 MIT
Commitments and Contingencies Disclosure [Line Items]
Rent expense		$ 1,800
Monthly payment for operating lease agreement			$ 5,083	$ 5,287	$ 1,475
Start date of operating lease agreement			Dec. 01, 2011	Dec. 01, 2013
Final date of operating lease agreement			Nov. 13, 2013	Nov. 30, 2016
Operating leases description		expires in May 2014
Leased space	9,761 square feet