As of December 31, 2013

As of December 31, 2012

Gross

Accumulated
Amortization

Impairment

Net

Gross

Accumulated
Amortization

Impairment

Net

Patents (4-10 years)

$

1,914

$

(1,895

)

$

—

$

19

$

1,914

$

(1,833

)

$

—

$

81

Trademarks (6 years)

69

(69

)

—

—

69

(69

)

—

—

Other (4 to 6 years)

817

(653

)

—

164

817

(598

)

—

219

Total

$

2,800

$

(2,617

)

$

—

$

183

$

2,800

$

(2,500

)

$

—

$

300

Goodwill (Indefinite life)

$

2,926

$

2,926

$

2,926

$

2,926