Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
The September 2019 Offering [Member] | ||||
Offering costs from issuance of common stock and warrants | $ 1,457 | $ 1,457 | ||
The April 2019 Offering [Member] | ||||
Offering costs from issuance of common stock and warrants | 1,579 | |||
Offering costs | $ 2,966 | $ 2,966 | $ 560 | |
Offering costs from issuance of common stock and warrants | $ 1,278 |