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Summary of Significant Accounting Policies (Details 4) - shares | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Average market price of common shares | 2,528,000 | 1,834,000
Average market price of common shares including potential shares was anti-dilutive | 10,000 | 187,000
Warrants [Member] |  |
Average market price of common shares | 1,960,000 | 1,480,000
Average market price of common shares including potential shares was anti-dilutive | 7,000 | 41,000
Stock Options [Member] |  |
Average market price of common shares | 568,000 | 354,000
Average market price of common shares including potential shares was anti-dilutive | 3,000 | 146,000

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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