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Related Party Transactions - Additional Information (Detail) | 3 Months Ended
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Sep. 30, 2017 USD ($)
Principal Owner [Member] |
Related Party Transaction [Line Items] |
Rent expense | $ 134,000
Principal Owner [Member] | Minimum |
Related Party Transaction [Line Items] |
Non controlling ownership interest minimum | 10.00%
Director [Member] | Spectrum Inc. |
Related Party Transaction [Line Items] |
Accrued expense related to director service | $ 95,000

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