Commitments and Contingencies  | 
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Dec. 31, 2018  | |||||||||||||||||||||||||||
| Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||
| Commitments and Contingencies Disclosure [Text Block] | 
 6. Commitments and Contingencies 
Lease Commitments We lease our facilities under an operating lease that expires in June 2021. Rent expense was $286,000, $293,000, and $257,000 for years ended December 31, 2018, 2017, and 2016, respectively. The following is a schedule of future minimum lease payments at December 31, 2018 (in thousands): 
 Legal Proceedings There are no ongoing legal proceedings against our company.  | 
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- References No definition available. 
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- Definition The entire disclosure for commitments and contingencies. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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