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Equity - Common Stock and Preferred Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |  |  | 1 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jun. 01, 2022 | Jul. 31, 2018 | Jul. 31, 2022 | Jun. 30, 2022 | Jun. 30, 2021
Stockholders' equity |  |  |  |  |
Common stock, authorized shares |  |  |  | 62,500 |
Preferred stock, authorized shares |  |  |  | 2,000 |
Number of shares of common stock issued |  |  | 1,500 |  |
Net proceeds from the offering |  |  |  | $ 4,798 | $ 5,309
ATM |  |  |  |  |
Stockholders' equity |  |  |  |  |
Number of shares of common stock issued |  |  |  | 501 |
Aggregate offering price |  |  |  | $ 8,700 |
Gross proceeds from the offering |  |  |  | 624 |
Net proceeds from the offering |  |  |  | $ 587 |
Share price of shares issued in offering (in dollars per share) |  |  |  | $ 1.24 |
Participation Right |  |  |  |  |
Stockholders' equity |  |  |  |  |
Stock Issued, Investor, Maximum Voting Power Percentage |  | 20.00% |  |  |
Stock Issued, Investor, Maximum Beneficial Ownership Percentage |  | 20.00% |  |  |
Underwritten public offering |  |  |  |  |
Stockholders' equity |  |  |  |  |
Number of shares of common stock issued | 4,186 |  |  |  |
Gross proceeds from the offering | $ 4,600 |  |  |  |
Net proceeds from the offering | $ 4,200 |  |  |  |
Share price of shares issued in offering (in dollars per share) | $ 1.11 |  |  |  |
Common Stock | ATM |  |  |  |  |
Stockholders' equity |  |  |  |  |
Number of shares of common stock issued |  |  |  | 1,600 |
Gross proceeds from the offering |  |  |  | $ 6,100 |
Net proceeds from the offering |  |  |  | $ 5,900 |
Share price of shares issued in offering (in dollars per share) |  |  |  | $ 3.84 |

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