Note 7 - Patents
|6 Months Ended|
Jun. 30, 2019
|Notes to Financial Statements|
|Goodwill and Intangible Assets Disclosure [Text Block]||
Patents are amortized utilizing the straight-line method over estimated useful lives ranging from
20years. Amortization expense was approximately
June 30, 2019,respectively. Amortization expense was approximately
June 30, 2018,respectively.
2018,the Company determined that the APAD Patents purchased in
notbe further developed or commercialized before their estimated useful life expires. As such, management determined that these assets were impaired and a charge of approximately
$1.5million was recorded.
The entire disclosure for goodwill and intangible assets.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef