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Goodwill and Intangible Assets (Tables)
3 Months Ended
Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of goodwill
The carrying amount of indefinite-lived goodwill was as follows (in thousands):

Goodwill
Balance at December 31, 2020$5,727 
Adjustment related to acquisition of LifeDojo(14)
Balance at March 31, 2021$5,713 
Schedule of the useful life of internal use software
The following table sets forth amounts recorded for intangible assets subject to amortization (in thousands):

At March 31, 2021At December 31, 2020
Weighted Average Estimated Useful Life (years)Gross ValueAccumulated AmortizationNet Carrying ValueGross ValueAccumulated AmortizationNet Carrying Value
Acquired software technology3$3,500 $(486)$3,014 $3,500 $(194)$3,306 
Customer relationships5270(23)247270(15)255
     Total$3,770 $(509)$3,261 $3,770 $(209)$3,561 
Schedule of intangible assets' estimated future amortization expense
At March 31, 2021, estimated amortization expense for intangible assets for each of the five years thereafter was as follows (in thousands):
Remainder of 2021$915 
20221,221
20231,026
202454
202545
  Total$3,261