Stockholders’ Equity (Details) - USD ($) $ / shares in Units, $ in Thousands |
1 Months Ended | 9 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Jan. 05, 2018 |
Sep. 30, 2017 |
Apr. 30, 2021 |
Apr. 30, 2020 |
Jul. 31, 2020 |
Dec. 31, 2014 |
Jan. 31, 2011 |
|
| Stockholders’ Equity (Details) [Line Items] | |||||||
| Common stock, par value (in Dollars per share) | $ 0.01 | $ 0.01 | |||||
| Percentage of commission payable on equity offering | 3.00% | ||||||
| Maximum offering price under sales agreement | $ 20,000 | $ 20,000 | |||||
| Common stock available for grant, description | The amendment and restatement of the Amended and Restated 2011 Plan was for purposes of, among other things, (i) increasing the shares of common stock available for grant under the Amended and Restated 2011 Plan by an additional 4,000,000 shares of common stock bringing the total number of shares available for grant to 9,000,000 shares of common stock and (ii) extending the term of the Amended and Restated 2011 Plan until October 7, 2030. | ||||||
| Share-based compensation arrangement by share-based payment award, number of shares available for grant (in Shares) | 4,834,000 | ||||||
| Compensation cost related to non-vested options | $ 916 | ||||||
| Performance share, description | During the nine months ended April 30, 2021, one former executive forfeited a total of 6,000 PSUs. During the nine months ended April 30, 2020, one former executive forfeited a total of 14,500 PSUs. | ||||||
| Compensation expense | $ 162 | $ 0 | |||||
| 2011 Plan [Member] | |||||||
| Stockholders’ Equity (Details) [Line Items] | |||||||
| Share based compensation arrangement by share based payment award restricted stock units (in Shares) | 3,000,000 | ||||||
| Share-based compensation arrangement by share-based payment award, number of additional shares authorized (in Shares) | 2,000,000 | ||||||
| Common stock available for grants (in Shares) | 5,000,000 | ||||||
| Common Stock [Member] | |||||||
| Stockholders’ Equity (Details) [Line Items] | |||||||
| Authorized common stock that may be issued and sold under sales agreement | $ 19,200 | ||||||
| Securities that may be sold under the agreement | $ 150,000 | ||||||