Condensed Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Payments of Stock Issuance Costs | $ 2,167 | $ 0 |
| 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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