Warrants, Recurring Level 3 Activity and Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Warrants [Abstract]
Gain (loss) on fair value	$ 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Number of warrants to purchase common stock (in shares)	403,090	1,860,790
Warrants Agreement [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Number of warrants to purchase common stock (in shares)	403,090
October 31, 2013 - Warrants [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Number of warrants to purchase common stock (in shares)	137,143	137,143
February 5, 2014 - Warrants [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Number of warrants to purchase common stock (in shares)	265,947	265,947
July 24, 2014 - Warrants [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Number of warrants to purchase common stock (in shares)	0	857,700
June 22, 2015 - Warrants [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Number of warrants to purchase common stock (in shares)	0	600,000
Level 3 [Member]
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Abstract]
Beginning balance	$ 67	$ 662
Increase (decrease) in Fair Value		(595)
Ending balance		67
Level 3 [Member] \| October 31, 2013 - Warrants [Member]
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Abstract]
Beginning balance	2	39
Increase (decrease) in Fair Value		(37)
Ending balance		2
Level 3 [Member] \| February 5, 2014 - Warrants [Member]
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Abstract]
Beginning balance	1	66
Increase (decrease) in Fair Value		(65)
Ending balance		1
Level 3 [Member] \| July 24, 2014 - Warrants [Member]
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Abstract]
Beginning balance	19	265
Increase (decrease) in Fair Value		(246)
Ending balance		19
Level 3 [Member] \| June 22, 2015 - Warrants [Member]
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Abstract]
Beginning balance	$ 45	292
Increase (decrease) in Fair Value		(247)
Ending balance		$ 45

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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