As of March 31, 2015

As of December 31, 2014

Accumulated

Accumulated

Gross

Amortization

Impairment

Net

Gross

Amortization

Impairment

Net

Patents (4-10 years)

$

1,914

$

(1,911

)

$

—

$

3

$

1,914

$

(1,907

)

$

—

$

7

Trademarks (6 years)

69

(69

)

—

—

69

(69

)

—

—

Other (4 to 6 years)

817

(724

)

—

93

817

(710

)

—

107

Total

$

2,800

$

(2,704

)

$

—

$

96

$

2,800

$

(2,686

)

$

—

$

114

Goodwill (Indefinite life)

$

2,926

$

2,926

$

2,926

$

2,926