Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - Additional Information (Detail)

v3.8.0.1
Related Party Transactions - Additional Information (Detail)
1 Months Ended 12 Months Ended
Jan. 26, 2017
USD ($)
Jan. 05, 2017
USD ($)
ExecutiveOfficers
Nov. 30, 2016
USD ($)
May 12, 2016
shares
Apr. 01, 2016
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
May 31, 2017
USD ($)
Related Party Transaction [Line Items]                    
Guaranteed borrowing capacity             $ 10,000,000      
Related party notes payable             1,000,000 $ 1,500,000    
Aston Capital Limited Liability Company                    
Related Party Transaction [Line Items]                    
Interest rate of debt     9.00%              
Related party notes payable     $ 1,500,000              
Repayment of debt $ 1,500,000                  
Number of new executives | ExecutiveOfficers   2                
Executive compensation cost   $ 0                
Annual payment for underlying lease             300,000 300,000 $ 300,000  
Aston Capital Limited Liability Company | Restricted Stock                    
Related Party Transaction [Line Items]                    
Number of shares authorized for grant | shares       250,000            
Stock awards vesting periods       3 years            
Aston Capital Limited Liability Company | Amended and Restated Promissory Note                    
Related Party Transaction [Line Items]                    
Guaranteed borrowing capacity                   $ 9,100,000
Debt instrument amount         $ 2,600,000          
Interest rate of debt         9.00% 9.00%        
Debt instrument maturity date         Apr. 01, 2019          
Repayment of notes             500,000      
Related party notes payable           $ 1,500,000        
Accrued interest             100,000 200,000    
Interest Expenses             $ 800,000 $ 200,000 $ 200,000