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Commitments and Contingencies (Tables) | 6 Months Ended
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Jun. 30, 2020
Commitments and Contingencies |
Product warranty accrued liability | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended |
​ | ​ | June 30, | ​ | June 30, |
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019 |
Beginning accrued product warranty | ​ | $ | 362 | ​ | $ | 325 | ​ | $ | 387 | ​ | $ | 236 | ​
Accruals for warranties issued | ​ |  | 128 | ​ |  | 115 | ​ |  | 189 | ​ |  | 242 | ​
Adjustments related to pre-existing warranties including expirations and changes in estimates | ​ |  | (42) | ​ |  | 55 | ​ |  | (72) | ​ |  | 148 | ​
Cost of warranty repair | ​ |  | (96) | ​ |  | (142) | ​ |  | (152) | ​ |  | (273) | ​
Ending accrued product warranty | ​ | $ | 352 | ​ | $ | 353 | ​ | $ | 352 | ​ | $ | 353 | ​

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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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