| Commitments and Contingencies (Tables) | 3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Future Minimum Payments Under Other Obligations | 
As of March 31, 2019, future minimum payments under inventory purchase and other obligations are as follows:
 
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| Future Minimum Payments Under Inventory Purchase Obligations | 
As of March 31, 2019, future minimum payments under inventory purchase and other obligations are as follows:
 
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- References No definition available. 
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- Definition Tabular disclosure of information about obligations resulting from other commitments. No definition available. 
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- Definition Tabular disclosure of unconditional purchase obligations that are recognized as a liability on the balance sheet, including the nature and term of the unconditional purchase obligations; the aggregate amount of payments for each of the five years following the date of the latest balance sheet; and the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings associated with suppliers' financing arrangements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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