Notes Payable and advances from related parties - Additional Information (Detail) (USD $)	9 Months Ended				9 Months Ended		3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Feb. 10, 2012	Sep. 30, 2014 Promissory Notes	Jan. 17, 2012 MIT	Mar. 31, 2014 MIT Promissory Notes
Secured Convertible Notes Payable [Line Items]
Note payable						$ 700,000
Notes payable, refinanced with LANB principal and accrued interest				708,000
Monthly payment to LANB on promissory note							10,000
Interest rate on promissory note							5.50%
Notes Payable, Total	482,000
Interest expense, Other	1,761,000	1,349,000			25,000
Notes Payable, Related Parties, Current	623,000
Interest Rate On Capital Lease For Equipment	7.25%
Capital Leased Assets, Gross	12,800		12,800
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	$ 2,910		$ 1,165
Debt Instrument, Maturity Date, Description					maturing on April 2015.