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Fair Value of Financial Assets and Liabilities - Derivative Instruments (Fair Value of Financial Liabilities Measured on Recurring Basis) (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2016 | Jun. 30, 2016 | Jun. 30, 2016 | Sep. 30, 2016 | Dec. 31, 2015
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Transfers between fair value levels, in | $ 0 |  |  | $ 0 | $ 0
Transfers between fair value levels, out | 0 |  |  | 0 | 0
Gain on derivative liability |  | $ 91,000 | $ 91,000 |  |
Series B preferred stock derivative liability |  |  |  |  | 1,493,000
Warrant liability |  |  |  |  | 6,000
Total liabilities | 1,649,000 |  |  | 1,649,000 | 1,499,000
Dilutive Financing Derivative Liability [Member] |  |  |  |  |
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Derivative liability | 382,000 |  |  | 382,000 |
June 2016 Offering Liability [Member] |  |  |  |  |
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Warrant liability | 1,267,000 |  |  | 1,267,000 |
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Series B preferred stock derivative liability |  |  |  |  |
Warrant liability |  |  |  |  |
Total liabilities |  |  |  |  |
Fair Value, Inputs, Level 1 [Member] | Dilutive Financing Derivative Liability [Member] |  |  |  |  |
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Derivative liability |  |  |  |  |
Fair Value, Inputs, Level 1 [Member] | June 2016 Offering Liability [Member] |  |  |  |  |
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Warrant liability |  |  |  |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |  |
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Series B preferred stock derivative liability |  |  |  |  |
Warrant liability |  |  |  |  |
Total liabilities |  |  |  |  |
Fair Value, Inputs, Level 2 [Member] | Dilutive Financing Derivative Liability [Member] |  |  |  |  |
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Derivative liability |  |  |  |  |
Fair Value, Inputs, Level 2 [Member] | June 2016 Offering Liability [Member] |  |  |  |  |
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Warrant liability |  |  |  |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Series B preferred stock derivative liability |  |  |  |  | 1,493,000
Warrant liability |  |  |  |  | 6,000
Total liabilities | 1,649,000 |  |  | 1,649,000 | $ 1,499,000
Fair Value, Inputs, Level 3 [Member] | Series 2011 Warrants [Member] |  |  |  |  |
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Warrant liability | 0 |  |  | 0 |
Fair Value, Inputs, Level 3 [Member] | Dilutive Financing Derivative Liability [Member] |  |  |  |  |
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Derivative liability | 382,000 |  |  | 382,000 |
Fair Value, Inputs, Level 3 [Member] | June 2016 Offering Liability [Member] |  |  |  |  |
Schedule Of Derivative Liabilities At Fair Value [Line Items] |  |  |  |  |
Warrant liability | $ 1,267,000 |  |  | $ 1,267,000 |

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- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313 + Details
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- Definition Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy. + 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 (c)(3) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 + Details
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