Goodwill and Other Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
There were no changes in the carrying amount of goodwill during the nine months ended September 30, 2018:
 
 
 
 
 
 
 
 
 
Balance as of January 1, 2018
 
Additions
 
Accumulated Impairment Losses
 
Balance as of September 30, 2018
 
 
 
 
 
 
 
 
 
(in thousands)
Goodwill
$
465

 
$
—

 
$
—

 
$
465

 
 
 
 
 
 
 
 
Schedule of Finite-Lived Intangible Assets
The carrying amounts of these intangible assets as of September 30, 2018 were as follows:
 
 
 
 
 
 
 
 
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
Estimated Useful Lives
 
 
 
 
 
 
 
 
 
(in thousands)
 
(in years)
Patents and license rights
$
1,669

 
$
(511
)
 
$
1,158

 
7-12
Customer relationships
1,304

 
(282
)
 
1,022

 
10
510(k) authorization
567

 
(109
)
 
458

 
15
Developed technology
62

 
(33
)
 
29

 
10
Capitalized software development costs
98

 
(86
)
 
12

 
2
Other
17

 
(17
)
 
—

 
2-3
Capitalized patents and license rights not yet amortized
291

 
—

 
291

 
 
 
$
4,008

 
$
(1,038
)
 
$
2,970

 
 
 
 
 
 
 
 
 
 

The carrying amounts of intangible assets as of December 31, 2017 were as follows:
 
 
 
 
 
 
 
 
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
Estimated Useful Lives
 
 
 
 
 
 
 
 
 
(in thousands)
 
(in years)
Patents and license rights
$
1,635

 
$
(361
)
 
$
1,274

 
7-12
Customer relationships
1,304

 
(40
)
 
1,264

 
10
510(k) authorization
567

 
(80
)
 
487

 
15
Developed technology
62

 
(28
)
 
34

 
10
Capitalized software development costs
98

 
(49
)
 
49

 
2
Other
17

 
(15
)
 
2

 
2-3
Capitalized patents and license rights not yet amortized
291

 
—

 
291

 
 
 
$
3,974

 
$
(573
)
 
$
3,401

 
 
 
 
 
 
 
 
 
 
Schedule of Indefinite-Lived Intangible Assets
The carrying amounts of intangible assets as of December 31, 2017 were as follows:
 
 
 
 
 
 
 
 
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
Estimated Useful Lives
 
 
 
 
 
 
 
 
 
(in thousands)
 
(in years)
Patents and license rights
$
1,635

 
$
(361
)
 
$
1,274

 
7-12
Customer relationships
1,304

 
(40
)
 
1,264

 
10
510(k) authorization
567

 
(80
)
 
487

 
15
Developed technology
62

 
(28
)
 
34

 
10
Capitalized software development costs
98

 
(49
)
 
49

 
2
Other
17

 
(15
)
 
2

 
2-3
Capitalized patents and license rights not yet amortized
291

 
—

 
291

 
 
 
$
3,974

 
$
(573
)
 
$
3,401

 
 
 
 
 
 
 
 
 
 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
As of September 30, 2018, the amortization expense related to identifiable intangible assets, with definite useful lives, in future periods is expected to be as follows:
 
 
 
Year Ending December 31,
 
(in thousands)
2018 (remaining)
 
$
177

2019
 
551

2020
 
551

2021
 
511

2022
 
215

Thereafter
 
674

Total
 
$
2,679