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v3.20.1

Subsequent Events - Additional Information (Details) - USD ($) |  |  | 2 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 27, 2020 | Jan. 22, 2020 | Mar. 30, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Subsequent Event [Line Items] |  |  |  |  |
Common stock, par value (in dollars per share) |  |  |  | $ 0.01 | $ 0.01
(Gain) loss on marketable securities |  |  |  | $ (206,000) | $ 28,000
Subsequent Event [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
(Gain) loss on marketable securities | $ 300,000 |  |  |  |
Percentage loss on marketable securities | 5.50% |  |  |  |
Subsequent Event [Member] | Open Market Sale Agreement [Member] | Jefferies LLC [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Common stock, par value (in dollars per share) |  | $ 0.01 |  |  |
Shares sold in the offering |  |  | 263,725 |  |
Price per share |  |  | $ 13.65 |  |
Amount raised through offering |  |  | $ 3,491,000 |  |
Subsequent Event [Member] | Open Market Sale Agreement [Member] | Jefferies LLC [Member] | Maximum [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Aggregate offering price |  | $ 15,000,000 |  |  |

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