Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Common Stock - Additional Information (Detail)

v3.19.1
Shareholders' Equity - Common Stock - Additional Information (Detail)
12 Months Ended
Jul. 17, 2018
USD ($)
$ / shares
shares
Jun. 22, 2018
USD ($)
shares
Apr. 06, 2018
$ / shares
shares
Mar. 09, 2018
shares
Jan. 08, 2018
$ / shares
shares
Dec. 01, 2017
Feb. 09, 2017
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Jan. 19, 2018
shares
Jan. 31, 2017
shares
Dec. 31, 2016
shares
Class of Stock [Line Items]                        
Number of authorized shares of all classes of our capital stock                     120,000,000  
Common stock, shares authorized               200,000,000 200,000,000 45,000,000 100,000,000  
Stock issued during period shares reverse stock splits ratio         0.10              
Common stock par value | $ / shares     $ 0.001   $ 0.001     $ 0.001 $ 0.001      
Effective date of common stock split         Jan. 19, 2018              
Common stock, shares outstanding               29,433,135 4,928,335 4,900,000    
Preferred stock, shares authorized               50,000,000 50,000,000     20,000,000
Fractional share from reverse stock split         0              
Warrants granted 13,800,000   900,000                  
Warrants exercise price per share | $ / shares     $ 2.00                  
Shares of stock issued during period     900,000                  
Share price per unit | $ / shares     $ 2.00                  
Term of warrants     5 years                  
Non-exercisable term of warrants     6 months                  
Net proceeds from public offering | $ $ 12,400,000                      
Proceeds from public offering | $ $ 13,800,000             $ 13,800,000        
Recognized compensation expense relating to restricted stock awards | $               $ 24,320 $ 123,200      
Class of warrants exercised               9,505,500        
Frederick Telling [Member]                        
Class of Stock [Line Items]                        
Shares of stock issued during period 100,000                      
Shares of common stock callable by warrants issued 100,000                      
Alan Dunton [Member]                        
Class of Stock [Line Items]                        
Shares of stock issued during period 20,000                      
Shares of common stock callable by warrants issued 20,000                      
Non-employee Directors [Member] | 2012 Equity Incentive Plan [Member]                        
Class of Stock [Line Items]                        
Recognized compensation expense relating to restricted stock awards | $   $ 24,320             $ 123,200      
Non-employee Directors [Member] | 2012 Equity Incentive Plan [Member] | Restricted Stock [Member]                        
Class of Stock [Line Items]                        
Restricted shares awarded to each non-employee director   4,000         4,000          
Restricted shares vested for each non-employee director   4,000             4,000      
Underwriter [Member]                        
Class of Stock [Line Items]                        
Warrants granted 1,800,000                      
Shares of stock issued during period 1,800,000                      
Common Stock [Member]                        
Class of Stock [Line Items]                        
Common stock, shares outstanding               29,433,135 4,928,335     4,912,335
Shares of stock issued during period 4,436,000             4,436,000        
Share price per unit | $ / shares $ 3.00                      
Proceeds from public offering | $ $ 2,300,000                      
Issuance of common stock in exchange for services, Shares               25,000        
Warrant exercises, Shares               9,505,500        
Warrant [Member]                        
Class of Stock [Line Items]                        
Proceeds from public offering | $ $ 6,500,000                      
Series D Preferred Stock [Member]                        
Class of Stock [Line Items]                        
Shares of stock issued during period 9,364,000                      
Convertible preferred stock, number of shares of common stock 9,364,000                      
Proceeds from public offering | $ $ 5,000,000                      
Deemed dividend | $ $ 1,400,000             $ 1,412,041        
Convertible into shares of common stock               9,364,000        
Convertible Preferred Stock [Member]                        
Class of Stock [Line Items]                        
Number of shares of preferred stock converted       2,583,000                
Common Stock [Member]                        
Class of Stock [Line Items]                        
Total preferred stock issued       258,300                
Scenario, Previously Reported [Member]                        
Class of Stock [Line Items]                        
Common stock, shares authorized                 450,000,000      
Common stock, shares outstanding                 49,000,000      
Minimum [Member]                        
Class of Stock [Line Items]                        
Stock issued during period shares reverse stock splits ratio           0.2            
Maximum [Member]                        
Class of Stock [Line Items]                        
Stock issued during period shares reverse stock splits ratio           0.1            
Amendment [Member]                        
Class of Stock [Line Items]                        
Number of authorized shares of all classes of our capital stock                     270,000,000  
Common stock, shares authorized   200,000,000                 250,000,000  
Amendment Two [Member]                        
Class of Stock [Line Items]                        
Common stock, shares authorized                 450,000,000      
Capital Unit, Class A [Member]                        
Class of Stock [Line Items]                        
Warrants exercise price per share | $ / shares $ 1.00                      
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                      
Capital Unit, Class B [Member]                        
Class of Stock [Line Items]                        
Share price per unit | $ / shares $ 1.00                      
Capital Unit, Class B [Member] | Series D Preferred Stock [Member]                        
Class of Stock [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