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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
Schedule II - Valuation and Qualifying Accounts [Text Block] | Schedule II Valuation and Qualifying Accounts The Company maintains an allowance for the distributors’ ship and debit credits relating to the sell-through of the Company’s products. This reserve is established using the Company’s historical ship and debit amounts and levels of inventory in the distributor channels. The following is a summary of the activity in the allowance for ship and debit credits:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Balance at |  | Charged to |  | ​ | ​ |  | ​ | ​
​ | ​ | Beginning of | ​ | Costs and | ​ | ​ | ​ | ​ | Balance at End
(In thousands) |  | Period |  | Expenses |  | Deductions(1) |  | of Period
Allowance for ship and debit credits: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​
Year ended December 31, 2018 | ​ | $ | 39,486 | ​ | $ | 242,068 | ​ | $ | (241,436) | ​ | $ | 40,118
Year ended December 31, 2019 | ​ | $ | 40,118 | ​ | $ | 230,278 | ​ | $ | (236,921) | ​ | $ | 33,475
Year ended December 31, 2020 | ​ | $ | 33,475 | ​ | $ | 257,765 | ​ | $ | (264,805) | ​ | $ | 26,435
(1) | Deductions relate to ship and debit credits issued which adjust the sales price from the standard distribution price to the pre-approved lower price. Refer to Note 2, Significant Accounting Policies and Recent Accounting Pronouncements, for the Company’s revenue recognition policy, including the Company’s accounting for ship and debit claims.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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