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Stockholders' Equity - Share-Based Compensation - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Unrecognized compensation expense related to non-vested share-based compensation awards $ 200,000   $ 200,000  
Cost expected to be recognized over weighted average period     7 months 6 days  
Share-based compensation (Income) expense $ 75,000 $ (140,000) $ 133,000 $ (121,000)
2019 Equity Incentive Plan [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Shares available for grant 333,333   333,333  
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%