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Related Party Transactions - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Sep. 29, 2017
Aug. 24, 2017
Aug. 23, 2017
Aug. 22, 2017
Aug. 21, 2017
Jun. 30, 2017
May 16, 2017
Mar. 31, 2017
Mar. 25, 2017
Feb. 08, 2017
Feb. 07, 2017
Dec. 06, 2016
Sep. 02, 2016
Sep. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Related Party Transaction [Line Items]                                
Aggregate principal amount                           $ 2,800,000    
Preferred stock transaction                           5,500,000    
Proceeds from short term secured borrowing arrangement                             $ 1,200,000 $ 1,903,000
Private Placement [Member]                                
Related Party Transaction [Line Items]                                
Common stock, issued and sold to investors             85,000                  
Common stock, price per share             $ 1.10                  
Series B 10% Convertible Preferred Stock [Member]                                
Related Party Transaction [Line Items]                                
Preferred stock, dividend rate 10.00%                              
William W. Smith, Jr. and Dieva L. Smith [Member] | Secured Promissory Note [Member]                                
Related Party Transaction [Line Items]                                
Proceeds from short term secured borrowing arrangement           $ 1,000,000         $ 1,000,000 $ 1,000,000        
Interest rate per annum           12.00%         18.00% 18.00%        
Notes due date           Sep. 25, 2017         Mar. 24, 2017 Dec. 14, 2016        
Debt instrument extended maturity date           Jul. 25, 2018     Jun. 26, 2017              
Steven L. and Monique P. Elfman [Member] | Secured Promissory Note [Member]                                
Related Party Transaction [Line Items]                                
Proceeds from short term secured borrowing arrangement           $ 1,000,000       $ 1,000,000            
Interest rate per annum           12.00%       18.00%            
Notes due date           Sep. 25, 2017       Mar. 24, 2017         Mar. 24, 2017  
Debt instrument extended maturity date           Feb. 11, 2018   Jun. 23, 2017                
Andrew Arno [Member] | Private Placement [Member]                                
Related Party Transaction [Line Items]                                
Common stock, issued and sold to investors             50,000                  
Common stock, price per share             $ 1.10                  
Andrew Arno [Member] | Series B 10% Convertible Preferred Stock [Member]                                
Related Party Transaction [Line Items]                                
Preferred stock, shares issued upon convertible debt 50                              
William W. and Dieva L. Smith [Member] | Secured Promissory Note [Member]                                
Related Party Transaction [Line Items]                                
Interest rate per annum                     18.00%          
Notes due date                             Mar. 24, 2017  
Debt instrument extended maturity date                             Jun. 26, 2017  
William W. and Dieva L. Smith [Member] | Series B 10% Convertible Preferred Stock [Member]                                
Related Party Transaction [Line Items]                                
Preferred stock, shares issued upon convertible debt 2,750                              
William W And Dieva L Smith and Andrew Arno [Member] | Series B 10% Convertible Preferred Stock [Member]                                
Related Party Transaction [Line Items]                                
Aggregate principal amount $ 2,800,000                              
Note and Warrant Purchase Agreement [Member] | William W. Smith, Jr. and Dieva L. Smith [Member]                                
Related Party Transaction [Line Items]                                
Warrants expiration period                         5 years      
Purchase of warrants                         850,000      
Common stock exercise price                         $ 2.74      
Notes and warrants issuance date                         Sep. 06, 2016      
Note and Warrant Purchase Agreement [Member] | William W. Smith, Jr. and Dieva L. Smith [Member] | Series B 10% Convertible Preferred Stock [Member]                                
Related Party Transaction [Line Items]                                
Preferred stock transaction                           0    
Note and Warrant Purchase Agreement [Member] | Senior Subordinated Notes [Member] | William W. Smith, Jr. and Dieva L. Smith [Member]                                
Related Party Transaction [Line Items]                                
Aggregate principal amount                         $ 2,000,000      
New Short-term Secured Borrowing Arrangement [Member] | Steven L. and Monique P. Elfman [Member] | Secured Promissory Note [Member]                                
Related Party Transaction [Line Items]                                
Aggregate principal amount           $ 1,000,000                    
Interest rate per annum           12.00%                    
Notes due date       Jan. 25, 2018 Sep. 25, 2017                   Sep. 25, 2017  
New Short-term Secured Borrowing Arrangement [Member] | Andrew Arno [Member] | Secured Promissory Note [Member]                                
Related Party Transaction [Line Items]                                
Aggregate principal amount   $ 300,000                            
Proceeds from short term secured borrowing arrangement   $ 300,000                            
Interest rate per annum   12.00%                            
Notes due date   Jan. 31, 2018                            
New Short-term Secured Borrowing Arrangement [Member] | Andrew Arno [Member] | Series B 10% Convertible Preferred Stock [Member] | Secured Promissory Note [Member]                                
Related Party Transaction [Line Items]                                
Debt instrument extended maturity date   Jul. 25, 2018                            
New Short-term Secured Borrowing Arrangement [Member] | William W. and Dieva L. Smith [Member] | Secured Promissory Note [Member]                                
Related Party Transaction [Line Items]                                
Aggregate principal amount           $ 1,000,000                    
Proceeds from short term secured borrowing arrangement     $ 800,000                          
Interest rate per annum     12.00%     12.00%                    
Notes due date     Jan. 25, 2018 Jan. 25, 2018 Sep. 25, 2017                   Sep. 25, 2017  
New Short-term Secured Borrowing Arrangement [Member] | William W. and Dieva L. Smith [Member] | Series B 10% Convertible Preferred Stock [Member] | Secured Promissory Note [Member]                                
Related Party Transaction [Line Items]                                
Preferred stock transaction                           $ 0