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Revenues (Tables) | 12 Months Ended
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Dec. 31, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table sets forth our total net revenues for the periods shown disaggregated for our Chegg Services and Required Materials product lines (in thousands, except percentages):
| Years Ended December 31, |  | Change in 2020 |  | Change in 2019
| 2020 |  | 2019 |  | 2018 |  | $ |  | % |  | $ |  | %
Chegg Services | $ | 521,228 |  |  | $ | 332,221 |  |  | $ | 253,985 |  |  | $ | 189,007 |  |  | 57 | % |  | $ | 78,236 |  |  | 31 | %
Required Materials | 123,110 |  |  | 78,705 |  |  | 67,099 |  |  | 44,405 |  |  | 56 |  |  | 11,606 |  |  | 17 |
Total net revenues | $ | 644,338 |  |  | $ | 410,926 |  |  | $ | 321,084 |  |  | $ | 233,412 |  |  | 57 |  |  | $ | 89,842 |  |  | 28 |
Schedule of Accounts Receivable | The following table presents our accounts receivable, net, deferred revenue, and contract assets balances (in thousands, except percentages):
| December 31, |  | Change
| 2020 |  | 2019 |  | $ |  | %
Accounts receivable, net | $ | 12,913 |  |  | $ | 11,529 |  |  | $ | 1,384 |  |  | 12 | %
Deferred revenue | 32,620 |  |  | 18,780 |  |  | 13,840 |  |  | 74 |
Contract assets | 13,243 |  |  | 3,531 |  |  | 9,712 |  |  | 275 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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