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Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2019

Class Of Stock Disclosures [Abstract]

Schedule of Common Stock Reserved for Future Issuance

The following common stock is reserved for future issuance at March 31, 2019 and December 31, 2018:

	March 31, 2019 (1)			December 31, 2018 (1)
Warrants issued and outstanding		51,003			51,003
Stock option awards issued and outstanding		1,660,649			1,407,049
Authorized for grants under the 2016 Equity Incentive Plan		420,464	(2)		463,491
Authorized for grants under the 2016 Employee Stock Purchase Plan		100,000			100,000
		2,232,116			2,021,543

(1)

Treasury stock in the amount of 371,664 and 357,314 as of March 31, 2019 and December 31, 2018, respectively, are excluded from the table above.

(2)

On January 1, 2019, the number of authorized shares in the 2016 Equity Incentive Plan increased by 384,045 shares pursuant to the evergreen provisions of the 2016 Equity Incentive Plan.