XML 61 R43.htm IDEA: XBRL DOCUMENT v3.20.4
Income taxes - Reconciliation of Company's Actual Tax Rate to U.S. Federal Statutory Rate (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income tax rates    
- Statutory U.S. federal rate 21.00% 21.00%
- State income taxes, net of federal benefit 0.00% 0.00%
- Excess tax benefits related to stock compensation 0.00% 0.00%
- AMT credit and NOL Carryback 8.00% 1.00%
- Lobbying (1.00%) 0.00%
- Meals & Entertainment (1.00%) 0.00%
- Officer's Life Insurance 4.00% 0.00%
- Change in valuation allowance (28.00%) (25.00%)
Total 3.00% (3.00%)