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Stockholders' Equity
3 Months Ended
Mar. 31, 2020
Equity [Abstract]  
Stockholders' Equity Stockholders’ Equity
 
Common Stock
 
The Company had reserved shares of common stock for issuance as follows:
 
 March 31,
2020
December 31, 2019
Stock options and restricted stock units issued and outstanding5,988,461  5,562,484  
Stock options and restricted stock units available for grant under stock option plans3,200,200  1,954,804  
Common stock available for the Employee Stock Purchase Plan112,226  173,168  
Total9,300,887  7,690,456