XML 43 R24.htm IDEA: XBRL DOCUMENT v3.20.1
Summary of Significant Accounting Policies - Additional Information (Detail)
 12 Months Ended
Feb. 06, 2020
$ / shares
Aug. 08, 2019
$ / shares
Dec. 31, 2019
USD ($)
Segment
Reporting_Unit
shares
Dec. 31, 2018
USD ($)
shares
Jan. 01, 2019
USD ($)
Aug. 01, 2018
shares
Summary Of Significant Accounting Policies [Line Items]            
Net loss     $ (16,011,000) $ (14,065,000)    
Cash used in operating activities     (13,857,000) (11,893,000)    
Cash and cash equivalents     8,791,000 12,972,000    
Working capital     8,600,000      
Accumulated deficit     $ (57,582,000) (41,571,000)    
Closing bid price per NASDAQ listing notification letter | $ / shares   $ 1.00        
Consecutive business days for closing bid price of common stock   30 days        
Cash, cash equivalents and restricted cash, maturity period     three months or less      
Cash equivalents     $ 0 0    
Financial assets transfers level 1 to 2     0 0    
Financial assets transfers level 2 to 1     0 0    
Financial liabilities transfers level 1 to 2     0 0    
Financial liabilities transfers level 2 to 1     $ 0 0    
Number of operating business segments | Segment     1      
Number of reporting units | Reporting_Unit     1      
Impairment charge     $ 1,867,000 $ 0    
Impairment of tangible assets     $ 0      
Antidilutive securities excluded from computation of earnings per share, amount | shares     8,770,947 974,817    
Tax benefit     $ 0      
Income tax examination, likelihood of settlement, description     The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon settlement.      
Income tax examination, likelihood of settlement, percentage     50.00%      
Lease, Practical Expedients, Package [true false]     true      
Lease, Practical Expedient, Use of Hindsight [true false]     false      
Operating lease right of use asset     $ 316,000      
Operating lease liability     $ 324,000      
ASU 2016-02 [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Operating lease right of use asset         $ 489,000  
Operating lease liability         $ 491,000  
2014 Stock Incentive Plan [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Number of shares of common stock authorized issuance reduced | shares           766,500
Common stock, shares authorized for issuance | shares     1,700,000     337,955
2014 Stock Incentive Plan Under Evergreen Provision [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Number of shares of common stock authorized issuance reduced | shares           550,000
2014 Employee Stock Purchase Plan [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Common stock, shares authorized for issuance | shares     303,721     209,500
2014 Employee Stock Purchase Plan Under Evergreen Provision [Member] | Maximum [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Common stock, shares authorized for issuance | shares           135,000
Fair Value, Measurements, Recurring [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Assets measured at fair value     $ 0 $ 0    
Liabilities measured at fair value     $ 0 $ 0    
Subsequent Event [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Closing bid price per NASDAQ listing notification letter | $ / shares $ 1.00          
Consecutive business days for closing bid price of common stock 10 days          
Stock market granted additional calendar days 180 days          
Otic Pharma [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Ownership percentage     100.00%      
Otic Pharma, Inc. [Member]            
Summary Of Significant Accounting Policies [Line Items]            
Ownership percentage     100.00%