XML 30 R31.htm IDEA: XBRL DOCUMENT v3.20.1
2. Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 2,394 $ 2,566
Work-in-progress 1,367 1,455
Finished goods 1,485 2,497
Total inventories $ 5,246 $ 6,518