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Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended | 17 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 11, 2021 | Dec. 18, 2020 | Jul. 23, 2020 | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Mar. 31, 2021 | Mar. 31, 2020 | Mar. 25, 2020 | Sep. 11, 2020 | Jun. 30, 2020
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, par value |  |  |  | $ 0.001 |  |  |  |  | $ 0.001 |  |  |  | $ 0.001
Proceeds from sale of common stock |  |  |  |  |  |  |  |  | $ 33,555 | $ 5,650 |  |  |
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 |  |  |  | $ 28,328 |  |  |  |  | $ 28,328 |  |  | $ 2,500 | $ 625
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' equity |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,500
Second Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, par value | $ 0.001 |  |  |  |  |  |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock registered direct offering |  |  |  | 3,985,000 | 10,714,000 | 1,227,000 | 433,000 | 146,000 |  |  |  |  |
Gross proceeds before deducting placement agent’s fees and related offering expenses | $ 9,250 |  |  |  |  |  |  |  |  |  |  |  |
Common Stock | Second Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock registered direct offering | 2,845,535 |  |  |  |  |  |  |  |  |  |  |  |
Common stock offering price per share | $ 3.25 |  |  |  |  |  |  |  |  |  |  |  |
Common Stock | Market Issuance Sales Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock registered direct offering |  |  |  |  |  |  |  |  |  |  | 793,668 |  |
Proceeds from sale of common stock |  |  |  |  |  |  |  |  |  |  | $ 2,300 |  |
Average sale price per share |  |  |  |  |  |  |  |  |  |  | $ 3.04 |  |
Additional common stock shares sold |  |  |  |  |  |  |  |  |  |  | 0 |  |
Common Stock | At-the-Market Offering Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock registered direct offering |  | 1,139,323 |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of common stock |  | $ 3,600 |  |  |  |  |  |  |  |  |  |  |
Average sale price per share |  | $ 3.14 |  |  |  |  |  |  |  |  |  |  |
Warrants |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued |  |  |  | 899,484 |  |  |  |  | 899,484 |  |  |  | 85,913
Warrants | Second Purchase Agreement | Placement Agent |  |  |  |  |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued |  |  | 170,732 |  |  |  |  |  |  |  |  |  |
Percentage of shares sold in offering |  |  | 6.00% |  |  |  |  |  |  |  |  |  |
Exercise price of warrants |  |  | $ 4.0625 |  |  |  |  |  |  |  |  |  |
Percentage of per share offering price of shares |  |  | 125.00% |  |  |  |  |  |  |  |  |  |
Warrants maturity date |  |  | Feb. 11, 2026 |  |  |  |  |  |  |  |  |  |
Fair value per share of warrants |  |  | $ 2.94 |  |  |  |  |  |  |  |  |  |

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