XML 22 R11.htm IDEA: XBRL DOCUMENT v3.21.1
4. PATENTS, NET OF ACCUMULATED AMORTIZATION
 3 Months Ended
Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
PATENTS, NET OF ACCUMULATED AMORTIZATION

4. PATENTS, NET OF ACCUMULATED AMORTIZATION

 

Acacia’s only identifiable intangible assets at March 31, 2021 and December 31, 2020 are patents and patent rights. Patent-related accumulated amortization totaled $321,784,000 and $319,922,000 as of March 31, 2021 and December 31, 2020, respectively. Acacia’s patents have remaining estimated economic useful lives ranging from thirty-two to fifty-eight months. The weighted-average remaining estimated economic useful life of Acacia’s patents is approximately four years.

 

The following table presents the scheduled annual aggregate amortization expense as of March 31, 2021:

 

For the years ending December 31,     
(In thousands)      
Remainder of 2021   $7,836 
2022    10,448 
2023    10,381 
2024    9,005 
2025    6,630 
Thereafter    750 
    $45,050 

 

For the three months ended March 31, 2021, Acacia accrued patent and patent rights acquisition costs totaling $15 million, of which $10 million is due December 1, 2021, and $5 million is due February 18, 2023. They are included in Accrued patent investment costs and Other long-term liabilities in the accompanying consolidated balance sheets, respectively.