As of December 31, 2014

As of December 31, 2013

Accumulated

Accumulated

Gross

Amortization

Impairment

Net

Gross

Amortization

Impairment

Net

Patents (4-10 years)

$

1,914

$

(1,907

)

$

—

$

7

$

1,914

$

(1,895

)

$

—

$

19

Trademarks (6 years)

69

(69

)

—

—

69

(69

)

—

—

Other (4 to 6 years)

817

(710

)

—

107

817

(653

)

—

164

Total

$

2,800

$

(2,686

)

$

—

$

114

$

2,800

$

(2,617

)

$

—

$

183

Goodwill (Indefinite life)

$

2,926

$

2,926

$

2,926

$

2,926