| Retirement Plan | 12 Months Ended | 
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| Dec. 31, 2018 | |
| Compensation And Retirement Disclosure [Abstract] | |
| Retirement Plan | 10. Retirement Plan The Company has a defined contribution Simple Individual Retirement Arrangement plan, which covers all employees and provides for a Company match of up to 3% of all employee compensation to the plan. Total matching contributions made by the Company for the years ended December 31, 2018 and 2017 were $29,946 and $34,097, respectively. | 
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- References No definition available. 
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- Definition The entire disclosure for pension and other postretirement benefits. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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