3. Patents and Licenses (Details - Purchased patents and licenses) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Acquired Finite-Lived Intangible Assets [Line Items] | ||
| Accumulated Amortization | $ 11,647 | $ 11,302 |
| Patent And License [Member] | ||
| Acquired Finite-Lived Intangible Assets [Line Items] | ||
| Weighted Average Original Life (years) | 15 years 8 months 8 days | 15 years 8 months 8 days |
| Gross Carrying Amount | $ 13,840 | $ 13,840 |
| Accumulated Amortization | $ 11,647 | $ 11,302 |