Derivative Liabilities - Schedule of Changes in Fair Value of Level 3 Financial Liabilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Beginning balance	$ 2,399,000	$ 1,183,000
Recognition of warrant liabilities on issuance dates	1,905,000	1,321,000
Change in fair value of derivative liabilities	(3,186,000)	(105,000)
Ending balance	$ 1,118,000	$ 2,399,000