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Subsequent Event (Narrative) (Details) | 1 Months Ended
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Feb. 28, 2021 | Jan. 31, 2021
Subsequent Event Narrative Details |  |
Subsequent Event, Date | Feb. 01, 2021 | Jan. 01, 2021
Subsequent Event, Description | In February 2021, we entered into a $50.0 million ATM equity offering agreement with Craig-Hallum. Under the agreement we were able, at our discretion, to offer and sell shares of our common stock having an aggregate value of up to $50.0 million through Craig-Hallum. We have issued 2.5 million shares of our common stock for net proceeds of $48.7 million under this ATM agreement. No further shares are available for sales under this agreement. | In January 2021, we issued 1.1 million shares of our common stock for net proceeds of $6.6 million under the December 2020 ATM equity offering agreement with Craig-Hallum. In January 2021, we also received $6.1 million for the 1.0 million shares of common stock that were issued in December 2020. In total, we have issued 2.1 million shares of our common stock for net proceeds of $12.7 million under this ATM agreement. No further shares are available for sales under this agreement.

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