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Revenue (Tables)
 6 Months Ended
Jun. 30, 2022
Revenue from Contract with Customer [Abstract]  
Schedule of disaggregation of revenue
The following table presents the disaggregation of our revenue for the three and six months ended June 30, 2022 and 2021 (in thousands):
Three months ended June 30,
 20222021 Increase/(Decrease)
Variable patent royalty revenue$7,673 $7,323 $350 5 %
Fixed-fee royalty revenue91,756 69,296 22,460 32 %
Current patent royalties a
99,429 76,619 22,810 30 %
Non-current patent royalties b
24,556 9,586 14,970 156 %
Total patent royalties123,985 86,205 37,780 44 %
Current technology solutions revenue a
672 1,530 (858)(56)%
Total revenue$124,657 $87,735 $36,922 42 %
Six months ended June 30,
 20222021 Increase/(Decrease)
Variable patent royalty revenue$16,718 $14,419 $2,299 16 %
Fixed-fee royalty revenue181,599 138,592 43,007 31 %
Current patent royalties a
198,317 153,011 45,306 30 %
Non-current patent royalties b
26,747 13,367 13,380 100 %
Total patent royalties225,064 166,378 58,686 35 %
Current technology solutions revenue a
911 3,720 (2,809)(76)%
Total revenue$225,975 $170,098 $55,877 33 %
a.    Recurring revenues are comprised of current patent royalties, inclusive of dynamic fixed-fee royalty payments, and current technology solutions revenue from the tables above.
b.    Non-recurring revenues are comprised of non-current patent royalties, which include past patent royalties and royalties from static agreements, as well as patent sales from the tables above.
Schedule of contracted revenue
Based on contracts signed and committed as of June 30, 2022, we expect to recognize the following revenue from dynamic fixed-fee royalty payments over the term of such contracts (in thousands):
Revenue
Remainder of 2022$148,513 
2023129,365 
202480,951 
202568,573 
2026 and thereafter5,181 
Total Revenue$432,583