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Convertible Notes - Additional Information (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Feb. 26, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2020
Debt Instrument [Line Items] |  |  |  |  |  |
Total principal balance of Convertible Notes outstanding |  | $ 31,280 |  | $ 31,280 |  | $ 30,521
Debt issuance costs |  |  |  | 1,250 |  |
Interest expense |  | 1,911 | $ 1,633 | 3,868 | $ 3,329 |
Convertible Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Issuance of notes payable | $ 30,000 |  |  |  |  |
Debt instrument maturity date | Feb. 26, 2030 |  |  |  |  |
Total principal balance of Convertible Notes outstanding |  | 31,300 |  | 31,300 |  |
Issuance of notes to related parties. | $ 13,600 |  |  |  |  |
Debt instrument interest rate | 5.00% |  |  |  |  |
Notes payable, interest rate description | The Convertible Notes accrue interest at 5.0% per annum, payable semiannually in arrears on June 30 and December 31, commencing June 30, 2020, in cash or in kind at the option of the Company |  |  |  |  |
Number of common stock shares issuable upon conversion of each $1000 principal debt amount | 288.0018 |  |  |  |  |
Yield Percentage on identical non-convertible instrument | 12.50% |  |  |  |  |
Debt instrument unamortized discount | $ 12,600 |  |  |  |  |
Debt issuance costs | $ 1,200 |  |  |  |  |
Amortization period of convertible notes debt discount and debt issuance costs | 10 years |  |  |  |  |
Interest expense |  | $ 600 |  | $ 1,100 |  |
Matthew A. Drapkin | Convertible Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Issuance of notes to related parties. | $ 6,300 |  |  |  |  |
Jason W. Reese | Convertible Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Issuance of notes to related parties. | 6,700 |  |  |  |  |
Eric J Scheyer | Convertible Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Issuance of notes to related parties. | $ 700 |  |  |  |  |

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