Amortizable intangible assets:

​

​

Non-compete agreement (estimated life five years)

423

423

Accumulated amortization

(423

)

(423

)

-

-

​

​

Customer relationships (estimated lives 7 - 15 years)

6,058

6,058

Accumulated amortization

(4,525

)

(4,235

)

1,533

1,823

​

​

Backlog (estimated life one - two years)

327

327

Accumulated amortization

(327

)

(327

)

-

-

​

​

Patents (estimated life 10 - 14 years)

368

368

Accumulated amortization

(266

)

(241

)

102

127

​

​

Tradename (estimated life 15 years)

1,700

1,700

Accumulated amortization

(501

)

(416

)

1,199

1,284

​

​

Proprietary technology (estimated life 10 years)

11,100

11,100

Accumulated amortization

(4,902

)

(4,070

)

6,198

7,030

​

​

Totals

9,032

10,264

​

​

Non-amortizable intangible assets:

​

​

Trademarks

1,174

1,174