Note 4 - Inventories |
9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2018 | ||||||||||||||||||||||||||||||||||||||||||||||||
Notes to Financial Statements | ||||||||||||||||||||||||||||||||||||||||||||||||
Inventory Disclosure [Text Block] |
Inventories are stated at the lower of cost or net realizable value using the average cost method. Inventories consisted of the following (in thousands):
Write downs for excess or expired inventory are based on management’s estimates of forecasted usage of inventories and are included in cost of goods sold. A significant change in the timing or level of demand for certain products as compared to forecasted amounts may result in recording additional write downs for excess or expired inventory in the future. Charges to cost of goods sold for inventory write-downs, reserve adjustments, scrap, and expired inventories totaled approximately $13,000 and $15,000 for the three months ended September 30, 2018 and 2017 respectively, and $15,000 and $25,000 for the nine months ended September 30, 2018 and 2017, respectively. |