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Stockholders' Equity (Deficit) - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 17 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 23, 2020 | Oct. 21, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Mar. 25, 2020 | Sep. 11, 2020 | Jun. 30, 2020
Class Of Stock [Line Items] |  |  |  |  |  |  |
Net proceeds from sale of common stock |  |  | $ 0 | $ 321 |  |  |
Description of listing compliance |  |  | On September 11, 2020, the Company received a notice from the Listing Qualifications Department of the Nasdaq Stock Market LLC (“Nasdaq”) stating that it was not in compliance with the required stockholder’s equity of $2.5 million. |  |  |  |
Stockholders’ equity |  |  | $ (1,444) |  |  | $ 2,500 | $ 625
Maximum |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Stockholders’ equity |  |  |  |  |  |  | $ 2,500
Common Stock |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Issuance of common stock registered direct offering |  |  |  | 146,000 |  |  |
Common Stock | Market Issuance Sales Agreement |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Issuance of common stock registered direct offering |  |  |  |  | 793,668 |  |
Net proceeds from sale of common stock |  |  |  |  | $ 2,300 |  |
Average sale price per share |  |  |  |  | $ 3.04 |  |
Additional common stock shares sold |  |  |  |  | 0 |  |
Common Stock | Public Offering Purchase Agreement | Subsequent Event |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |
Issuance of common stock registered direct offering |  | 7,826,086 |  |  |  |  |
Gross proceeds from public offering of common stock | $ 18,000 |  |  |  |  |  |

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