Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Schedule of Stock Based Compensation (Details)

v3.20.1
Stock-Based Compensation - Schedule of Stock Based Compensation (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Total stock-based compensation expense $ 1,256,000 $ 2,103,000
Stock Option [Member]    
Total stock-based compensation expense 1,256,000 2,103,000
Tax benefit
Stock based compensation expense, net of tax 1,256,000 2,103,000
Stock Option [Member] | Research and Development Expense [Member]    
Total stock-based compensation expense 744,000 1,032,000
Stock Option [Member] | General and Administrative Expenses [Member]    
Total stock-based compensation expense 512,000 1,071,000
Restricted Stock [Member]    
Total stock-based compensation expense 464,000 172,000
Tax benefit
Stock based compensation expense, net of tax 464,000 172,000
Restricted Stock [Member] | Research and Development Expense [Member]    
Total stock-based compensation expense 325,000
Restricted Stock [Member] | General and Administrative Expenses [Member]    
Total stock-based compensation expense $ 139,000 $ 172,000