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Restricted Cash Restricted Cash | 12 Months Ended
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Dec. 31, 2017
Restricted Cash [Abstract] |
Restricted Assets Disclosure [Text Block] | Restricted Cash The Company has agreed to maintain $0.8 million in a money market account as collateral for an outside party that is providing certain commercial card processing services for the Company. The Company is restricted from withdrawing this balance without the prior consent of the outside party during the term of the agreement.

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- Definition The entire disclosure for assets that are restricted in their use, generally by contractual agreements or regulatory requirements. This would include, but not limited to, a description of the restricted assets and the terms of the restriction. + References No definition available. + Details
Name: | us-gaap_RestrictedAssetsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RestrictedCashAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration