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Consolidated Balance Sheets (Parenthetical) - shares
Jun. 30, 2019
Dec. 31, 2018
Consolidated Balance Sheets    
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred stock, shares outstanding 0 0
Common stock, shares authorized 10,000,000 10,000,000
Common stock, shares issued 3,451,797 3,029,157
Common stock, shares outstanding 3,451,797 3,029,157