Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Summary of Warrant Activity

A summary of warrant activity is as follows:

	Number of Shares		Weighted Average Exercise Price
Outstanding — December 31, 2016	445,000		$	6.78
Granted	—		—
Outstanding — December 31, 2017	445,000		$	6.78
Granted	—		—
Exercised	(445,000	)	$	6.78
Outstanding — December 31, 2018	—		—
Exercisable — December 31, 2018	—		$	—

Schedule of Stock by Class

We sold and issued shares of our common stock under both the December 2015 and August 2017 ATM Agreements, summarized as follows:

	No. of Common Shares Issued	Proceeds Received (Net of Broker Commissions and Fees )
Common shares issued pursuant to the December 2015 ATM Agreement during the year ended December 31, 2016	10,890,915	$	73,869
Common shares issued pursuant to the December 2015 ATM Agreement between July 1, 2017 and July 31, 2017	3,243,882	$	23,745
Common shares issued pursuant to the August 2017 ATM Agreement between August 1, 2017 and December 31, 2017	10,314,250	$	104,527