Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Stock Awards - Options (Details)

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Stockholders' Equity - Stock Awards - Options (Details) - Options - shares
1 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2016
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized 5,000,000 2,000,000  
Expiration period   10 years  
Additional shares authorized 3,000,000    
Shares available for grant     1,931,015