Commitments and Contingencies - Additional Information (Detail) (USD $)	0 Months Ended		12 Months Ended			0 Months Ended
	Jul. 07, 2011	Apr. 19, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jul. 07, 2011 Medical Device Assembly	Jul. 07, 2011 Warehousing	Nov. 14, 2012 Pending Litigation	Feb. 09, 2012 MIT	Dec. 05, 2011 MIT
Commitments and Contingencies Disclosure [Line Items]
Rent expense		$ 1,800	$ 153,000	$ 190,000
Monthly payment for operating lease agreement					2,835	5,083	5,287	5,000	12,856	1,475
Start date of operating lease agreement						Dec. 01, 2011	Dec. 01, 2013			Dec. 01, 2011
Final date of operating lease agreement						Nov. 13, 2013	Nov. 30, 2016			Dec. 01, 2012
Required first payment for operating lease			$ 70,210						$ 22,862
Operating lease agreement, duration									5 months
Operating leases description		expires in May 2013
Leased space	9,761 square feet							85,525.98 plus interest at the rate of 8