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Equity - Inducement Stock Options (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Granted (in shares)	743,161	1,328,718
Exercise price (in dollars per share)	$ 1.07	$ 1.32
Expected life	10 years	5 years 9 months
Weighted average volatility	83.00%	71.00%
Forfeiture rate	0.00%	20.00%
Weighted average risk-free interest rate	0.71%	2.52%
Expected dividend rate	0.00%	0.00%
Minimum [Member]
Vesting period	1 year
Maximum [Member]
Vesting period	3 years
Non-vested stock options
Granted (in shares)	176,000
Contractual life	10 years
Vesting period	2 years
Compensation expense	$ 52,000	$ 111,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 13,000
Expected life		5 years 9 months
Weighted average volatility		71.00%
Forfeiture rate		20.00%
Weighted average risk-free interest rate		2.55%
Expected dividend rate		0.00%
Non-vested stock options | Minimum [Member]
Exercise price (in dollars per share)	$ 1.16
Non-vested stock options | Maximum [Member]
Exercise price (in dollars per share)	$ 2.25
Non-vested stock options | Chief Executive Officer [Member]
Granted (in shares)	600,000
Non-vested stock options | 2011 Equity Incentive Plan [Member]
Granted (in shares)	258,618
Non-vested stock options | Non-Qualified Stock Option [Member]
Granted (in shares)	341,382

X

- Definition

The Forfeiture rate assumption that is used in valuing an option on its own shares.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Rate of weighted-average expected volatility for award under share-based payment arrangement.

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Gross number of share options (or share units) granted during the period.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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