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Warrants
 6 Months Ended
Jun. 30, 2021
Warrants [Abstract]  
Warrants
9.
Warrants
 

As of June 30, 2021 and December 31, 2020, the Company had warrants outstanding convertible into 7,051 and 603,386 shares of common stock at exercise price of $24.82 and $57.11 per share, respectively, which warrants will expire on June 28, 2023 and December 21, 2030, respectively.