Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - Additional Information (Detail)

v3.19.1
Related Party Transactions - Additional Information (Detail)
 12 Months Ended
Jul. 17, 2018
$ / shares
shares
Apr. 06, 2018
$ / shares
shares
Nov. 08, 2017
USD ($)
Investor
$ / shares
shares
May 10, 2017
USD ($)
Investor
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Related Party Transaction [Line Items]            
Share price per unit | $ / shares   $ 2.00        
Warrants exercise price per share | $ / shares   $ 2.00        
Shares of stock purchased   900,000        
Number of accredited investors | Investor       3    
Accounts payable and accrued expenses | $         $ 39,607 $ 39,457
Intrexon [Member]            
Related Party Transaction [Line Items]            
Accounts payable and accrued expenses | $         $ 39,607 $ 39,457
Percentage of outstanding common stock         5.00% 32.00%
Intrexon [Member] | Lantibiotic ECC [Member]            
Related Party Transaction [Line Items]            
Cash paid to Intrexon Corporation | $         $ 0 $ 594
Intrexon [Member] | Oral Mucositis ECC [Member]            
Related Party Transaction [Line Items]            
Cash paid to Intrexon Corporation | $         $ 460,056 524,026
Intrexon [Member] | Unsecured Non-convertible Promissory Note [Member]            
Related Party Transaction [Line Items]            
Debt instrument, face amount | $     $ 2,400,000 $ 2,400,000    
Debt instrument, term       2 years    
Interest rate       12.00%    
Debt instrument, accrued interest | $     $ 3,400,000      
Series D Preferred Stock [Member]            
Related Party Transaction [Line Items]            
Shares of stock purchased 9,364,000          
Series B Preferred Stock [Member]            
Related Party Transaction [Line Items]            
Share price per unit | $ / shares     $ 2.50      
Convertible shares Preferred stock, number of common stock upon conversion     1,320,000      
Convertible preferred stock, terms of conversion         Conversion of one share of Series B Preferred Stock into two shares of Common Stock.  
Conversion of Preferred stock into Common stock     2      
Series B Preferred Stock [Member] | Private Placement [Member]            
Related Party Transaction [Line Items]            
Proceeds from issuance of convertible preferred stock | $     $ 3,300,000      
Number of accredited investors | Investor     4      
Series B Preferred Stock [Member] | Private Placement [Member] | Fall 17 Warrant [Member]            
Related Party Transaction [Line Items]            
Warrants exercise price per share | $ / shares     $ 3.10      
Shares of common stock callable by warrants issued     1,064,518      
Term of warrants     7 years      
Non-exercisable term of warrants     6 months      
Series B Preferred Stock [Member] | Private Placement [Member] | Koski Family Limited Partnership [Member]            
Related Party Transaction [Line Items]            
Shares of common stock callable by warrants issued     241,936      
Shares of stock purchased     1,500,000      
Series C Preferred Stock [Member] | Intrexon [Member]            
Related Party Transaction [Line Items]            
Total preferred stock issued     100      
Series C Preferred Stock [Member] | Intrexon [Member] | Lantibiotic ECC [Member]            
Related Party Transaction [Line Items]            
Share issued during period, value | $           1,188
Series C Preferred Stock [Member] | Intrexon [Member] | Oral Mucositis ECC [Member]            
Related Party Transaction [Line Items]            
Share issued during period, value | $           $ 763,189
Frederick Telling [Member]            
Related Party Transaction [Line Items]            
Shares of common stock callable by warrants issued 100,000          
Shares of stock purchased 100,000          
Alan Dunton [Member]            
Related Party Transaction [Line Items]            
Shares of common stock callable by warrants issued 20,000          
Shares of stock purchased 20,000          
Capital Unit, Class A [Member]            
Related Party Transaction [Line Items]            
Share price per unit | $ / shares $ 1.00          
Number of common shares issued with each capital unit 1          
Common stock warrants term 7 years          
Number of warrants issued with each capital unit 1          
Warrants exercise price per share | $ / shares $ 1.00          
Capital Unit, Class B [Member]            
Related Party Transaction [Line Items]            
Share price per unit | $ / shares $ 1.00          
Capital Unit, Class B [Member] | Series D Preferred Stock [Member]            
Related Party Transaction [Line Items]            
Number of warrants issued with each capital unit 1          
Number of preferred shares issued with each capital unit 1          
Shares of common stock callable by warrants issued 1