Summary of Significant Accounting Policies (Details) - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Summary of Significant Accounting Policies [Abstract]
Foreign exchange gain			$ 200,000
Changes in carrying amounts of warrant liabilities [Abstract]
Beginning balance	$ 527,025	$ 3,789,391	693,000
Issued		0	6,933,000
Exercised		(1,895,000)	(9,000)
Net changes in valuation		(1,367,000)	(3,828,000)
Ending balance		$ 527,025	$ 3,789,391	$ 693,000
Antidilutive securities excluded from computation of earning per share amount (in shares)		7.6	8.3	3.6
Income Tax Disclosure [Line Items]
Federal corporate tax rate		35.00%
Recurring [Member]
Fair value measurements by level for assets and liabilities measured at fair value on a recurring basis
Cash equivalents		$ 35,834,000	$ 56,276,000
Warrant liabilities		$ (527,000)	(3,789,000)
Plan [Member]
Income Tax Disclosure [Line Items]
Federal corporate tax rate	21.00%
Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life		3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life		5 years
Level I [Member] | Recurring [Member]
Fair value measurements by level for assets and liabilities measured at fair value on a recurring basis
Cash equivalents		$ 35,834,000	56,276,000
Warrant liabilities		0	0
Level II [Member] | Recurring [Member]
Fair value measurements by level for assets and liabilities measured at fair value on a recurring basis
Cash equivalents		0	0
Warrant liabilities		0	0
Level III [Member] | Recurring [Member]
Fair value measurements by level for assets and liabilities measured at fair value on a recurring basis
Cash equivalents		0	0
Warrant liabilities		$ (527,000)	$ (3,789,000)