XML 31 R20.htm IDEA: XBRL DOCUMENT v3.19.2
Summary of Significant Accounting Policies (Details) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Inventories    
Raw materials $ 64,000 $ 80,000
Work-in-process 35,000 12,000
Finished goods 262,000 261,000
Inventories $ 361,000 $ 353,000