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v3.21.1

Stockholders' Equity - Inducement Plan - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
OUTSTANDING OPTIONS |  |  |
Outstanding at beginning of period | 100,600 |  |
Outstanding at end of period |  |  | 100,600
WEIGHTED-AVERAGE EXERCISE PRICE |  |  |
Outstanding at beginning of period | $ 3.09 |  |
Outstanding at end of period |  |  | $ 3.09
ADDITIONAL DISCLOSURES |  |  |
Weighted-average contractual term (years) exercisable | 9 years |  | 9 years 6 months
Outstanding options exercisable at end of period | 1,500 |  |
Aggregate intrinsic value (in thousands) exercisable at end of period | $ 1 |  |
Inducement Plan |  |  |
OUTSTANDING OPTIONS |  |  |
Options exercised | 0 |  |
Outstanding at end of period | 100,600 |  |
WEIGHTED-AVERAGE EXERCISE PRICE |  |  |
Outstanding at end of period | $ 3.09 |  |
VESTED AND EXPECTED TO VEST |  |  |
Outstanding options | 100,600 |  |
Weighted-Average Exercise Price | $ 3.09 |  |
Aggregate Intrinsic Value (in thousands) | $ 39 |  |
Shares vested | 0 | 0 |
Options exercised | 0 |  |
ADDITIONAL DISCLOSURES |  |  |
Weighted-average contractual term (years) exercisable | 9 years 2 months 12 days |  |
Weighted-average contractual term outstanding | 9 years 2 months 12 days |  |
Aggregate intrinsic value (in thousands) exercisable at end of period | $ 39 |  |
Fair value of shares vested | $ 2,205 |  |

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