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Stockholders' Equity And Stock-Based Compensation (Warrants Outstanding) (Details) - $ / shares | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of Shares Outstanding | 554,019 | 4,504,091
Warrants [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Issuance Date | Aug. 17, 2018 |
Expiration Date | Feb. 17, 2021 |
Exercise Price Per Share | $ 1.25 |
Number of Shares Outstanding | 554,019 | 4,496,116
Placement Agent Warrants [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Issuance Date | Aug. 17, 2018 |
Expiration Date | Feb. 17, 2021 |
Exercise Price Per Share | $ 1.59 |
Number of Shares Outstanding |  | 7,975

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- Definition Expiration date of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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