Quarterly report pursuant to Section 13 or 15(d)

Description of Business and Basis of Presentation - Additional Information (Detail)

v3.19.1
Description of Business and Basis of Presentation - Additional Information (Detail)
$ in Thousands
May 10, 2018
May 07, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Basis Of Presentation [Line Items]            
Working capital     $ 13,700      
Cash and cash equivalents, including restricted cash     3,268 $ 8,356 $ 8,730 $ 11,896
Accounts receivable     11,743 $ 11,112    
Reverse stock split ratio 0.2          
SWK Loan            
Basis Of Presentation [Line Items]            
Line of credit facility, maximum borrowing capacity     $ 12,500      
Subsequent Event | SWK Loan            
Basis Of Presentation [Line Items]            
Line of credit facility, maximum borrowing capacity   $ 15,000