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Organization, Nature of Operations and Basis of Presentation (Details) - USD ($) $ in Thousands, shares in Millions |  |  | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 15, 2018 | Aug. 10, 2018 | Jun. 30, 2019 | Dec. 31, 2018 | Aug. 31, 2019 | Jan. 01, 2019 | Jun. 30, 2018 | Dec. 31, 2017
Organization, Nature of Operations and Basis of Presentation |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | $ 21,712 | $ 28,918 | $ 20,100 |  | $ 7,129 | $ 17,116
Net proceeds from sale of securities | $ 16,700 |  |  |  |  |  |  |
Net proceeds from sale of common stock |  |  |  | 12,200 |  |  |  |
Reverse stock spilt |  | 128.5 | 3.7 |  |  |  |  |
Lessee, Operating Lease, Term of Contract |  |  | 12 months |  |  |  |  |
Right of Use Asset |  |  | $ 481 | 0 |  | $ 537 |  |
Operating Lease Liability |  |  | $ 233 | $ 0 |  | $ 939 |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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