Nature of Business and Significant Accounting Policies, Income Taxes and Loss Per Share (Details) - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. corporate income tax rate	21.00%	34.00%
Percentage of valuation allowance on deferred tax assets	100.00%
Potential shares of common stock that are not included in the calculation of diluted net loss per share [Abstract]
Potential shares of common stock that are not included in the calculation of diluted net loss per share (in shares)	758,032	672,048
Reported net loss with reported net loss per share [Abstract]
Net loss	$ (17,032,000)	$ (13,382,000)
Deemed dividend to preferred shareholders (see Note 6)	0	(11,590,000)
Net loss after deemed dividend	$ (17,032,000)	$ (24,972,000)
Weighted average shares outstanding (in shares)	404,000	48,000
Basic and diluted loss per share (in dollars per share)	$ (42.14)	$ (525.01)
Recent Accounting Pronouncements [Abstract]
Goodwill impairment loss	$ 200,000
Series E Convertible Preferred Stock [Member]
Reported net loss with reported net loss per share [Abstract]
Deemed dividend to preferred shareholders (see Note 6)		$ (1,000,000)
Series F Convertible Preferred Stock [Member]
Potential shares of common stock that are not included in the calculation of diluted net loss per share [Abstract]
Potential shares of common stock that are not included in the calculation of diluted net loss per share (in shares)	18,190	60,480
Reported net loss with reported net loss per share [Abstract]
Deemed dividend to preferred shareholders (see Note 6)		$ (8,700,000)
Series C and D Convertible Preferred Stock [Member]
Reported net loss with reported net loss per share [Abstract]
Deemed dividend to preferred shareholders (see Note 6)		$ (1,800,000)
Stock Options [Member]
Potential shares of common stock that are not included in the calculation of diluted net loss per share [Abstract]
Potential shares of common stock that are not included in the calculation of diluted net loss per share (in shares)	140,546	2,766
Restricted Stock Units [Member]
Potential shares of common stock that are not included in the calculation of diluted net loss per share [Abstract]
Potential shares of common stock that are not included in the calculation of diluted net loss per share (in shares)	3	15
Warrants to Purchase Common Stock [Member]
Potential shares of common stock that are not included in the calculation of diluted net loss per share [Abstract]
Potential shares of common stock that are not included in the calculation of diluted net loss per share (in shares)	599,293	608,787
ASU 2016-02 [Member] \| Plan [Member] \| Minimum [Member]
Recent Accounting Pronouncements [Abstract]
Right of use assets	$ 575,000
Lease liabilities	575,000
ASU 2016-02 [Member] \| Plan [Member] \| Maximum [Member]
Recent Accounting Pronouncements [Abstract]
Right of use assets	625,000
Lease liabilities	$ 625,000

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