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Acquired Intangible Assets
 3 Months Ended
Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Acquired Intangible Assets Acquired Intangible Assets

The following are the details of our intangible assets subject to amortization as of the dates presented:
 
 
 
March 31, 2020
 
December 31, 2019
 
Useful Lives (Years)
 
Gross
 
Accumulated Amortization
 
Net
 
Gross
 
Accumulated Amortization
 
Net
Trade names
10
 
$
1,040

 
$
(572
)
 
$
468

 
$
1,040

 
$
(546
)
 
$
494

Developed technology
10
 
2,980

 
(1,639
)
 
1,341

 
2,980

 
(1,564
)
 
1,416

Customer relationships
10
 
860

 
(473
)
 
387

 
860

 
(452
)
 
408

 
 
 
$
4,880

 
$
(2,684
)
 
$
2,196

 
$
4,880

 
$
(2,562
)
 
$
2,318



Acquired intangible assets are amortized using the straight-line method over their estimated useful life, which approximates the expected use of these assets. Amortization expense amounted to $122 for
each of the three months ended March 31, 2020 and 2019. We will recognize the remaining amortization expense of $2,196 over a five-year period, with the first four years recognizing expense of $488 per year and the fifth year recognizing expense of $244.