XML 29 R18.htm IDEA: XBRL DOCUMENT v3.8.0.1
Inventory (Details) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Details      
Inventory, Raw Materials, Gross $ 1,756,392 $ 1,812,603  
Inventory, Work in Process, Gross 1,651,849 1,604,867  
Inventory, Finished Goods, Gross 1,749,437 1,674,630  
Inventory, Gross 5,157,678 5,092,100  
Inventory Valuation Reserves (561,000) (564,000)  
Inventories, net $ 4,596,678 $ 4,528,100 $ 5,287,442