Annual report pursuant to Section 13 and 15(d)

Long-Term Assets (Schedule of Carrying Amounts Related to Acquired Intangible Assets) (Details)

v3.20.1
Long-Term Assets (Schedule of Carrying Amounts Related to Acquired Intangible Assets) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Long-term Assets Schedule Of Carrying Amounts Related To Acquired Intangible Assets    
Patents at beginning, net $ 507 $ 510
Additions 38 59
Less: amortization expense 86 62
Patents at ending, net $ 459 $ 507