Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Nov. 18, 2021 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2018 |
|
| Class of Stock [Line Items] | ||||
| Proceeds from offering | $ 183 | $ 9,783 | ||
| ATM Offering [Member] | ||||
| Class of Stock [Line Items] | ||||
| Sale of stock agreement, authorized amount | $ 10,000 | |||
| Proceeds from offering | $ 200 | |||
| Preferred Stock- Series B [Member] | ||||
| Class of Stock [Line Items] | ||||
| Preferred stock, conversion price per share | $ 0.3022 | $ 0.75 | ||
| Common stock issued upon conversion of preferred stock | 18,726,009 | |||
| Preferred stock, redemption price per share | $ 1,000 | |||