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7. Derivative Liabilities - Derivative Liabilities - Assumptions Used (Details)	12 Months Ended
	Dec. 31, 2014
Commitment Date | Minimum
Expected dividends	0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_DerivativeByNatureAxis = SAFE_CommitmentDateMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Expected volatility	150.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DerivativeByNatureAxis = SAFE_CommitmentDateMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Expected term	2 years
Risk free interest rate	0.29%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_DerivativeByNatureAxis = SAFE_CommitmentDateMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Commitment Date | Maximum
Expected term	5 years
Risk free interest rate	1.68%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_DerivativeByNatureAxis = SAFE_CommitmentDateMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Remeasurement Date | Minimum
Expected dividends	0.00%us-gaap_FairValueAssumptionsExpectedDividendRate / us-gaap_DerivativeByNatureAxis = SAFE_RemeasurementDateMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Expected volatility	150.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate / us-gaap_DerivativeByNatureAxis = SAFE_RemeasurementDateMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Expected term	10 months
Risk free interest rate	0.67%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_DerivativeByNatureAxis = SAFE_RemeasurementDateMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Remeasurement Date | Maximum
Expected term	3 years 10 months
Risk free interest rate	1.65%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_DerivativeByNatureAxis = SAFE_RemeasurementDateMember / us-gaap_RangeAxis = us-gaap_MaximumMember

X

- Definition

Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: