Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Details)

v3.21.2
Income Taxes - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Dec. 31, 2015
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Income Tax Disclosure [Abstract]          
Provision for income taxes   $ 0 $ 0 $ 0 $ 0
Research and development tax credit utilized as reduction of payroll expenses   $ 0 $ 108,000 $ 154,000 $ 264,000
Research and development tax credit utilized against employer's portion of payroll tax $ 250,000