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Summary of Significant Accounting Policies (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2019
Property, Plant and Equipment |  |  |
Cash and cash equivalents | $ 14,178,000 | $ 10,282,000 |
Impairments of long lived assets | 0 | 0 |
Goodwill impairment | 0 | 0 |
Impairment of finite lived intangible assets | 0 | 0 |
Accrued warranty | 1,222,000 | 2,057,000 |
Foreign currency transaction loss | 202,000 | (483,000) |
Research and development expenses | 2,614,000 | 2,646,000 |
Accumulated other comprehensive loss | $ (20,183,000) | (22,191,000) |
Accounting Standards Update 2018-02 | Reclassified |  |  |
Property, Plant and Equipment |  |  |
Accumulated other comprehensive loss |  |  | $ 633,000
Buildings | Minimum |  |  |
Property, Plant and Equipment |  |  |
Property, plant and equipment useful life | 7 years |  |
Buildings | Maximum |  |  |
Property, Plant and Equipment |  |  |
Property, plant and equipment useful life | 40 years |  |
Machinery and equipment | Minimum |  |  |
Property, Plant and Equipment |  |  |
Property, plant and equipment useful life | 2 years |  |
Machinery and equipment | Maximum |  |  |
Property, Plant and Equipment |  |  |
Property, plant and equipment useful life | 13 years |  |
Leasehold improvements | Minimum |  |  |
Property, Plant and Equipment |  |  |
Property, plant and equipment useful life | 6 years |  |
Leasehold improvements | Maximum |  |  |
Property, Plant and Equipment |  |  |
Property, plant and equipment useful life | 10 years |  |
Non Domestic |  |  |
Property, Plant and Equipment |  |  |
Cash and cash equivalents | $ 13,660,000 | 8,058,000 |
Bank term deposits | $ 17,000 | $ 16,000 |

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