Warrants (Tables)

3 Months Ended

Mar. 31, 2020

The following table summarizes the common stock warrants outstanding as of March 31, 2020 and December 31, 2019, each exercisable into the number of shares of common stock set forth below as of the specified dates:


					Shares Exercisable at
	Exercise		Expiration	Exercisable	March 31,	December 31,
Issued	Price		Date	From	2020	2019
2013	$	7.50	April 2021	July 2017	82,816	82,816
2014	$	7.50	November 2024	July 2017	16,000	16,000
2016	$	8.27	October 2026	September 2017	14,512	14,512
2018	$	12.18	October 2025	October 2018	184,660	184,660
2018	$	12.18	October 2025	(1)	—	—
					297,988	297,988

As of March 31, 2020, and December 31, 2019, warrants outstanding to acquire 86,175 shares of common stock are not exercisable and are only exercisable upon draw down of the Term Loan B.