Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Statement of Stockholders' Equity [Abstract] | |||
| Offering cost May 2016 Private Placement | $ 345 | ||
| Allocated transaction cost | $ 167 | 629 | |
| Offering cost November 2016 public offering | $ 1,688 | ||
| Public offering December 2017 transaction cost | $ 10 | $ 1,256 | |
| Payments of Stock Issuance Costs | $ 2,096 | ||
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- Definition Amount of increase (decrease) in additional paid in capital (APIC) resulting from Allocated transaction cost. No definition available.
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- Definition Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration. No definition available.
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| X | ||||||||||
- Definition Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration. No definition available.
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| X | ||||||||||
- Definition Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The cash outflow for cost incurred directly with the issuance of an equity security. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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