Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Schedule of Warrant Activity

A summary of the Company’s warrant activity by warrant type is as follows:

Warrant Type	Cash Exercise Price per share		Warrants/UPO's Outstanding 12/31/2018	Warrants issued for UPO exercises	Warrants/UPO’s Exercised		Warrants Outstanding 12/31/2019
					Cash	Cashless
Common stock warrant (Series D-1)	$	5.54	14,866	—	—	—	14,866
Common stock warrants (Series F)	$	9.22	1,085,059	—	(400,740)	(306,917)	377,402
Public Warrants (PHUNW)	$	11.50	6,900,610	—	—	(5,139,319)	1,761,291
Private Placement Warrants	$	11.50	10,182,060	—	(216,556)	(8,307,123)	1,658,381
Unit Purchase Options (UPOs)	$	11.50	130,000	—	—	(130,000)	—
Unit Purchase Option Warrants	$	11.50	—	116,172	—	(92,000)	24,172
Total			18,312,595	116,172	(617,296)	(13,975,359)	3,836,112