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Inventory (Notes) | 9 Months Ended
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Sep. 30, 2019
Inventory Disclosure [Abstract] |
Inventory Disclosure [Text Block] | Inventories consisted of the following:
| September 30, 2019 |  | December 31, 2018
Raw materials | $ | 15,431,000 |  |  | $ | 17,278,000 |
Work in process | 1,740,000 |  |  | 2,034,000 |
Finished goods | 6,242,000 |  |  | 6,453,000 |
| $ | 23,413,000 |  |  | $ | 25,765,000 |
Inventory quantities on-hand are regularly reviewed, and where necessary, provisions for excess and obsolete inventory are recorded based on historical and anticipated usage.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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