Quarterly report pursuant to Section 13 or 15(d)

Stock Incentive Plan - Additional Information (Detail)

v3.19.3
Stock Incentive Plan - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Jul. 05, 2019
May 14, 2019
May 08, 2019
Sep. 30, 2019
Sep. 30, 2019
Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Expected term of award       7 years 8 months 12 days 7 years 8 months 12 days 7 years 4 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period         430,384  
Employee service share-based compensation, nonvested awards, compensation not yet recognized, stock options       $ 58,000 $ 58,000  
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition         1 year 8 months 12 days  
Restricted Stock [Member] | Executive Officer            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   119,049        
Restricted Stock [Member] | Executive Officer [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period 2 years          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 41,323          
Restricted Stock [Member] | Management [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     270,012      
Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Expected term of award         6 years  
Minimum [Member] | Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period         1 year  
Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Expected term of award         10 years  
Maximum [Member] | Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period         5 years  
Employee Stock Option [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement by share-based payment award, number of shares authorized     8,000,000      
Number of additional shares authorized     3,000,000      
Share price       $ 1.53 $ 1.53  
Share-based compensation arrangement by share-based payment award, options, vested in period, fair value         $ 700,000 $ 300,000
Employee Stock Option [Member] | Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period         4 years  
Employee Stock Option [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period         5 years