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Note 7 - Agreements, Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Product Warranty Liability [Table Text Block] |
|  | 2019 |
Balance at December 31, 2018 |  | $ | 432,225 |
Warranty costs charged to cost of goods sold |  |  | 707,079 |
Utilization charges against reserve |  |  | (315,556 | )
Release of accrual related to expired warranties |  |  | - |
Foreign currency effect |  |  | (10,460 | )
Balance at December 31 , 2019 |  | $ | 813,288 |

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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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