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Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Spectrum Inc. |  |
Related Party Transaction [Line Items] |  |
Spectrum Acquisition, tax preparation and other fees | $ 0.2 |
Principal Owner |  |
Related Party Transaction [Line Items] |  |
Rent Expense | 0.7 |
Accrued refunds current | $ 1.7 |
Principal Owner | Minimum | Spectrum Inc. |  |
Related Party Transaction [Line Items] |  |
Non controlling ownership interest minimum | 10.00% |
Director |  |
Related Party Transaction [Line Items] |  |
Accrued expenses related to director service |  | $ 0.2

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- Definition A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07.2(a),(b),(c),(d)) -URI http://asc.fasb.org/extlink&oid=114873854&loc=SL114874292-224272 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section 45 -Paragraph 3 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=114873831&loc=SL114874205-224268 + Details
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