XML 55 R52.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Other Assets (Schedule of Other Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
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
Other assets $ 20,338 $ 17,663