Stockholders' Equity and Convertible Preferred Stock (Details 1)	6 Months Ended
Jun. 30, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number of Shares [Roll Forward]
Outstanding at beginning \| shares	124,381
Employee options expired \| shares	(23,664)
Non-employee options expired \| shares	(310)
Outstanding at ending \| shares	100,407
Options vested and expected to vest \| shares	100,407
Options vested and exercisable \| shares	100,407
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning \| $ / shares	$ 209.22
Employee options expired \| $ / shares	378.67
Non-employee options expired \| $ / shares	571.71
Outstanding at ending \| $ / shares	169.21
Options vested and expected to vest \| $ / shares	169.21
Options vested and exercisable \| $ / shares	$ 169.21
Share-based Compensation Arrangement by Share-based Payment Award, Options, Total Intrinsic Value [Roll Forward]
Outstanding at beginning \| $
Employee options expired \| $
Non-employee options expired \| $
Outstanding at ending \| $
Options vested and expected to vest \| $
Options vested and exercisable \| $
Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Remaining Contractual Life [Roll Forward]
Outstanding at beginning	4 years 9 months 18 days
Outstanding at ending	5 years 6 months
Options vested and expected to vest	5 years 6 months
Options vested and exercisable	5 years 6 months

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The expired-date intrinsic value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Share based compensation arrangement by share based payment award options outstanding expired non intrinsic value.

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Share based compensation arrangement by share based payment award options expirations in period weighted average exercise price.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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