Income Taxes (Reconciliation of Statutory to Effective Income Tax Rate) (Details)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Abstract]
U.S. federal statutory income tax rate	21.00%	21.00%
State income taxes, net of federal tax	2.60%	7.00%
Stock-based compensation	(0.50%)	0.00%
Change in valuation allowance	(22.70%)	(28.00%)
Net operating loss carryforwards and credit expirations	(3.10%)
Stock issuance costs	(1.20%)
Gain on derivative liability extinguishment	1.20%
Slovenia facility sale	1.90%
Permanent differences	1.30%
Other	(0.50%)
Effective income tax rate	0.00%	0.00%

Effective income tax rate permanent differences.

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- Definition

Effective income tax rate reconciliation loss on sale of foreign subsidiary.

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Effective income tax rate reconciliation related to stock issuance costs.

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No definition available.

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- Definition

Represents the contribution of other permanent differences between reported income tax expense (benefit) and expected income tax expense (benefit) computed

+ References

No definition available.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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