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Subsequent Event - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
May 03, 2019 | Mar. 31, 2019 | Apr. 25, 2019 | Dec. 31, 2018
Transaction costs |  | $ 1,000 |  |
Common stock, shares issued |  | 44,073,998 |  | 43,917,378
Exercised number of shares |  | 1,893 |  |
C Technologies Acquisition |  | $ 500 |  |
Subsequent Event [Member] |  |  |  |
Fair value of net assets acquired |  |  | $ 240,335 |
Common stock, shares issued | 3,144,531 |  |  |
Common Stock Issue Price Per Share | $ 64.00 |  |  |
Net proceeds | $ 190,200 |  |  |
Subsequent Event [Member] | Underwriter [Member] |  |  |  |
Exercised number of shares | 410,156 |  |  |
C Technologies [Member] | Subsequent Event [Member] |  |  |  |
Fair value of net assets acquired |  |  | $ 240,300 |

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