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Revenues (Tables)
12 Months Ended
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 2020Change in 2019
 202020192018$%$%
Chegg Services$521,228 $332,221 $253,985 $189,007 57 %$78,236 31 %
Required Materials123,110 78,705 67,099 44,405 56 11,606 17 
Total net revenues$644,338 $410,926 $321,084 $233,412 57 $89,842 28 
Schedule of Accounts Receivable
The following table presents our accounts receivable, net, deferred revenue, and contract assets balances (in thousands, except percentages):
 December 31,Change
 20202019$%
Accounts receivable, net$12,913 $11,529 $1,384 12 %
Deferred revenue32,620 18,780 13,840 74 
Contract assets13,243 3,531 9,712 275