Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2019

Equity [Abstract]

Schedule of Reserved Shares of Common Stock for Future Issuance

The Company had reserved shares of common stock for future issuance as follows:

	September 30, 2019	December 31, 2018
Outstanding stock options (Note 11)	1,932,002	1,671,666
Warrants to purchase common stock issued in January 2018 Offering (Note 10)	10,000,000	10,000,000
Outstanding stock appreciation rights (Note 11)	1,000,000	—
For possible future issuance under 2016 Stock Plan (Note 11)	280,208	699,376
	13,212,210	12,371,042