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Stockholders' Equity - Share-Based Compensation - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
May 02, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Shares available for grant         0
Unrecognized compensation expense related to non-vested share-based compensation awards $ 100,000   $ 100,000    
Cost expected to be recognized over weighted average period     3 months 18 days    
Share-based compensation (Income) expense $ 70,000 $ 116,000 $ 203,000 $ (5,000)  
2019 Equity Incentive Plan [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Shares available for grant 502   502    
2019 Equity Incentive Plan [Member] | Maximum [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Number of shares reserved for issuance 1,500,000   1,500,000    
2019 Equity Incentive Plan [Member] | Minimum [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock options, exercise price of common stock granted as percentage of fair value on the date of grant     100.00%