Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Inventories (Details Textual)

v3.8.0.1
Note 5 - Inventories (Details Textual) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Inventory Valuation Reserves, Ending Balance $ 220,000 $ 220,000