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Stockholders' Equity
12 Months Ended
Dec. 31, 2018
Stockholders' Equity Note [Abstract]  
Stockholders' Equity

7.

Stockholders’ Equity


In September 2018, the common stock private placement was extended to December 31, 2019 by our Company’s Board of Directors. In October 2017, a warrant holder exercised warrants to purchase 17,700 shares of common stock of our Company at exercise prices ranging from $0.01 to $0.03.