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STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Best Offering [Member] |  |  |
Issuance expenses, amount | $ 1,056 | $ 686 |
Registered Direct [Member] |  |  |
Issuance expenses, amount | 1,019 | 1,125 |
Private Placement [Member] |  |  |
Issuance expenses, amount | $ 993 |  |
Warrant Exercise [Member] |  |  |
Issuance expenses, amount |  | $ 1,019 |
Investment Agreement [Member] |  |  |
Issuance expenses, amount |  |  | $ 830
Atm Offering Program [Member] |  |  |
Issuance expenses, amount |  |  | 236
Follow-on Public Offering [Member] |  |  |
Issuance expenses, amount |  |  | $ 1,505

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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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