Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.10.0.1
Commitments and Contingencies - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Loss Contingencies [Line Items]        
Operating lease beginning date   Mar. 01, 2014    
Operating lease ending date   Jul. 31, 2019    
Sub-lease annual rental income   $ 71,000    
Accrued costs of Settlement Agreement $ 100,000 100,000   $ 505,000
Reimburse to Plaintiff's opposing counsel   99,000    
Reversal of accrued costs of Settlement Agreement 405,000 405,000    
Insurance reimbursement   405,000 $ (505,000)  
Insurance Reimbursement for Professional Fees [Member]        
Loss Contingencies [Line Items]        
Insurance reimbursement $ 200,000 200,000    
Business Law Group [Member]        
Loss Contingencies [Line Items]        
Annual rental income   $ 168,000