Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Detail)

v3.8.0.1
Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Mar. 08, 2018
Sep. 14, 2016
Feb. 28, 2018
Oct. 31, 2017
Jun. 26, 2017
Sep. 18, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Mar. 16, 2018
Subsequent Event [Line Items]                    
Stock Issued During Period, Value, New Issues               $ 53,000    
Payments of Stock Issuance Costs             $ 2,804 $ 0 $ 0  
Stock Issued During Period, Shares, New Issues       43,292   10,000        
Debt Instrument, Interest Rate, Stated Percentage             28.00%      
Debt Instrument, Maturity Date, Description             May - 2018      
Proceeds from issuance of Common stock         $ 34,200          
Opus Credit Facility [Member]                    
Subsequent Event [Line Items]                    
Debt Instrument, Interest Rate, Stated Percentage   12.00%                
DebtInstrument Expiration period   Sep. 14, 2018                
Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Debt Instrument, Face Amount     $ 6,500              
Cash fee Rate     8.00%              
Maximum Cash Fee Expenses     $ 300              
Debt Instrument, Interest Rate, Stated Percentage     8.00%              
Line of Credit Facility, Maximum Borrowing Capacity     $ 30,000              
Debt Instrument, Maturity Date, Description     Each Note matures on the 24 month anniversary of issuance, provided that the Company may extend the maturity date for two six-month periods.              
DebtInstrument Expiration period     Mar. 31, 2018              
Subsequent Event [Member] | Checkpoint [Member]                    
Subsequent Event [Line Items]                    
Stock Issued During Period, Value, New Issues $ 23,000                  
Payments of Stock Issuance Costs $ 2,000                  
Stock Issued During Period, Shares, New Issues 4,600,000                  
Shares Issued, Price Per Share $ 4.35                  
Payment Of Placement Agent Fee     $ 500              
Proceeds from Issuance of Long-term Debt     $ 6,500              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 690,000                  
Proceeds from issuance of Common stock $ 21,000                  
Subsequent Event [Member] | Opus Credit Facility [Member]                    
Subsequent Event [Line Items]                    
Debt Instrument, Interest Rate, Stated Percentage                   12.00%