Nature of Business and Significant Accounting Policies, Loss Per Share and Recent Accounting Pronouncements (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
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)	7,892,406	758,032
Reported net loss with reported net loss per share [Abstract]
Net loss	$ (18,114)	$ (17,032)
Deemed dividend to preferred shareholders (see Note 6)	(4,509)	0
Net loss after deemed dividend	$ (22,623)	$ (17,032)
Weighted average shares outstanding (in shares)	2,433,000	404,000
Basic and diluted loss per share (in dollars per share)	$ (9.30)	$ (42.14)
Recent Accounting Pronouncements [Abstract]
Operating lease right-of-use asset, net	$ 442	$ 0
Operating lease liability	$ 447
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)	405,730	140,546
Restricted Stock Units (RSU) [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)	0	3
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)	6,948,466	599,293
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)	538,210	18,190
ASU 2016-02 [Member] \| Adjustments Due to Adoption of ASU 2016-02 [Member]
Recent Accounting Pronouncements [Abstract]
Operating lease right-of-use asset, net	$ 600
Operating lease liability	$ 600

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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The aggregate value of preferred stock dividends and other adjustments necessary to derive net income apportioned to common stockholders.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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