Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 License	Dec. 31, 2013	Dec. 31, 2012
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents excess of FDIC insured amount	$ 216,733	$ 22,489	$ 2,328,074
Cash and cash equivalents FDIC insured amount	250,000
Inventory reserve	160,000	(62,000)
Number of technology licenses	2
Write-off of the unamortized balance	1,100,000
Impairment of long-lived assets	0
Unamortized balance of technology licenses		1,100,000
Unrecognized tax benefits	0
Significant increase or decrease within next twelve months	0
Interest or penalties	0	0
Income tax examination, description	Tax years beginning in 2011 are generally subject to examination by taxing authorities, although net operating losses from all years are subject to examinations and adjustments for at least three years following the year in which the attributes are used.
Dilutive securities not included in calculation of loss per common share	0	0
Outstanding stock options and warrants	2,788,242	1,122,830
Non-cash impairment loss on investment	1,834,672	0
Transfers between level 1, 2 or 3	0	0
Discount rate on fair value of investment in preferred stock	14.00%
Dividend yield assumed	0.00%
Dividend expected to be paid	0
Earliest Tax Year [Member]
Summary Of Significant Accounting Policies [Line Items]
Open tax year under examination	2011
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets	3 years
Income tax examination period	3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of assets	5 years
Credit Concentration Risk [Member]
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents excess of FDIC insured amount	$ 0