Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Millions |
Sep. 30, 2018
USD ($)
|
|---|---|
| Accounting Policies [Abstract] | |
| Prepaid commission expense | $ 0.7 |
| X | ||||||||||
- Definition Amount of consideration paid in advance for commission expense. No definition available.
|
| X | ||||||||||
- References No definition available.
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