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Earnings / (Loss) per Share: (Details Narrative) - shares
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of anti-dilutive shares 1,371,038 956,500
Share-based Payment Arrangement, Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of anti-dilutive shares   104,250