XML 78 R13.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Other Assets | 12 Months Ended
--- | ---
Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Other Assets | 6.Other Assets Other assets consist of the following:
December 31, |  | 2019 |  |  | 2018 |
Patents, at cost |  | $ | 7,181 |  |  | $ | 6,955 |
Accumulated amortization |  |  | (4,780 | ) |  |  | (4,491 | )
Deposits on capital items |  |  | 11,886 |  |  |  | 12,106 |
Right-of-use assets |  |  | 2,610 |  |  |  | — |
Other |  |  | 3,441 |  |  |  | 3,093 |
|  | $ | 20,338 |  |  | $ | 17,663 |
The capitalized cost of patents is amortized using the straight-line method over their useful lives. The cost of patent amortization was $0.3 million in 2019, 2018, and 2017. The estimated annual patent amortization cost for each of the next five years is $0.3 million. Costs incurred to maintain existing patents are charged to expense in the year incurred.

X
- References No definition available. + Details
Name: | us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for other assets. This disclosure includes other current assets and other noncurrent assets. + References No definition available. + Details
Name: | us-gaap_OtherAssetsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration