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Common Stock and Preferred Stock - Series A Preferred Stock (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Increase (Decrease) in Temporary Equity [Roll Forward]    
Balance, January 1, $ 0 $ 0
Preferred stock accrued dividends 483,000 0
Balance, December 31, $ 483,000 $ 0