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Consolidated Balance Sheets (Parenthetical) - shares
Jun. 30, 2020
Dec. 31, 2019
Statement of Financial Position [Abstract]    
Common stock, shares authorized 7,000,000 7,000,000
Common stock, shares issued 3,212,924 3,294,672
Common stock, shares outstanding 3,212,924 3,294,672
Preferred stock, shares authorized 1,000,000 1,000,000
Unvested shares 190,484 227,844