Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Additional Information (Detail)

v3.6.0.2
Shareholders' Equity - Additional Information (Detail)
12 Months Ended
Dec. 31, 2016
shares
Dec. 29, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Investor
$ / shares
shares
Jun. 06, 2016
Installments
$ / shares
shares
Feb. 15, 2016
shares
Dec. 01, 2015
shares
Aug. 03, 2015
shares
Mar. 23, 2015
$ / shares
shares
Mar. 16, 2015
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Jan. 31, 2017
shares
Sep. 15, 2016
Sep. 14, 2016
Jun. 09, 2015
Dec. 31, 2014
shares
Class of Stock [Line Items]                                  
Number of authorized shares of all classes of our capital stock 120,000,000                   120,000,000            
Number of authorized shares of common stock 100,000,000                   100,000,000 100,000,000          
Cash received from related parties | $                     $ 250,000            
Recognized compensation expense relating to restricted stock awards | $                     $ 151,200 $ 264,000          
Stock option awards                     725,250 928,500          
Exercise price of plan | $ / shares                     $ 0.69 $ 1.31          
Shares underlying warrant outstanding                 2,170,925                
Warrants exercisable price per share | $ / shares                 $ 2.00                
Warrants Outstanding 175,584                   175,584            
Number of stock options outstanding 1,621,523                   1,621,523 1,471,031         820,865
Total number of outstanding common shares if all warrant and stock options were exercised 50,911,326                                
Convertible Promissory Note [Member] | Principal Owner [Member]                                  
Class of Stock [Line Items]                                  
Interest rate                               3.00%  
Common stock issued in connection with conversion of convertible promissory note             3,381,004                    
Conversion price of note, per share | $ / shares                       $ 1.50          
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           40,000       40,000              
Restricted shares vested for each non-employee director                     40,000 40,000          
Recognized compensation expense relating to restricted stock awards | $                     $ 151,200 $ 264,000          
Ms. Christine L. Koski [Member] | 2012 Equity Incentive Plan [Member] | Restricted Stock [Member]                                  
Class of Stock [Line Items]                                  
Restricted shares vested for each non-employee director                     20,000            
Dr. Alan Joslyn [Member]                                  
Class of Stock [Line Items]                                  
Stock option awards         300,000                        
Exercise price of plan | $ / shares         $ 0.55                        
Number of shares vesting in each installment         50,000                        
Number of vest installments | Installments         6                        
Description of award terms                     The Company issued (i) stock options to purchase 300,000 shares of the Company's common stock at an exercise price equal to $0.55 per share which stock options shall vest in six installments of 50,000 shares every six months after June 6, 2016, provided that he has continued his employment with the Company through such dates, and (ii) 30,000 shares of restricted stock of the Company, vesting in two installments on the six month and twelve month anniversaries of June 6, 2016.            
Dr. Alan Joslyn [Member] | Restricted Stock [Member]                                  
Class of Stock [Line Items]                                  
Restricted shares awarded to each non-employee director         30,000                        
Number of vest installments | Installments         2                        
Griffin Securities Inc. [Member]                                  
Class of Stock [Line Items]                                  
Warrants, exercised on a net issuance basis               185,585                  
Shares of common stock issued upon exercise of warrants               98,592                  
Private Placement [Member]                                  
Class of Stock [Line Items]                                  
Issuance date       Jun. 30, 2016                          
Shares issued       9,045,679                          
Number of accredited investors | Investor       3                          
Shares issued price per share | $ / shares       $ 0.5159                          
Proceeds from issuance | $       $ 4,667,000                          
Private Placement [Member] | KFLP [Member]                                  
Class of Stock [Line Items]                                  
Shares issued       5,815,080                          
Interest rate       3.00%                   6.00% 3.00%    
Note receivable due from sale of common stock | $       $ 2,000,000                          
Cash received from related parties | $   $ 1,000,000 $ 1,000,000                            
Extended maturity date of notes payable                     Dec. 31, 2016            
Subsequent Event [Member] | Amendment [Member]                                  
Class of Stock [Line Items]                                  
Number of authorized shares of all classes of our capital stock                         270,000,000        
Number of authorized shares of common stock                         250,000,000