1. Summary of Significant Accounting Policies (Detail Narrative) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Significant Accounting Policies [Line Items] | |||
| Depreciation expense | $ 8,478 | $ 8,454 | $ 8,413 |
| Goodwill, carrying amount | 9,730 | 9,730 | 9,730 |
| Goodwill, impairment loss | 0 | 0 | $ 0 |
| Allowances for doubtful accounts | $ 50 | $ 22 | |
| Cash deposits in excess of federally insured limits | |||
| Significant Accounting Policies [Line Items] | |||
| Risk concentration | 91.00% | ||
| Patent And License [Member] | Minimum [Member] | |||
| Significant Accounting Policies [Line Items] | |||
| Patents and licenses, useful lives | 7 years | ||
| Patent And License [Member] | Maximum [Member] | |||
| Significant Accounting Policies [Line Items] | |||
| Patents and licenses, useful lives | 20 years | ||