14.Warrants

The following table summarizes the change in warrants for the nine months ended September 30, 2018:

						Weighted
				Weighted		Average		Weighted
				Average		Remaining		Average
	Number of			Exercise		Contractual		Grant Date
	Warrants			Price		Life (in years)		Fair Value
Outstanding at December 31, 2017		13,162,668		$	1.08		4.5	$	0.39
Exercised		(8,562,631	)		1.09		—		—
Cancelled		(95,600	)		1.65		—		—
Outstanding at September 30, 2018		4,504,437			1.03		4.0	$	0.26

In connection with the borrowings under the SVB Loan Agreement, the Company issued warrants to Silicon Valley Bank and Oxford Finance to purchase shares of the Company’s Common Stock amounting to an aggregate of 430,815 warrants under the SVB Loan Agreement. The warrants expire seven years from their respective issue date. In February 2018, the Company terminated its relationship with a vendor who had been issued warrants to acquire 950,000 shares of Common Stock (the “Service Warrants”) with staggered vesting requirements. As part of the termination agreement, the Company accelerated the full vesting of the Service Warrants.