Selected Quarterly Financial Data (Tables)
|12 Months Ended|
Dec. 31, 2018
|Quarterly Financial Information Disclosure [Abstract]|
|Quarterly Financial Information [Table Text Block]||
*Net Income due to gain on remeasurement of the warrant liabilities in excess of the quarter to date loss.
Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data.
Reference 1: http://www.xbrl.org/2003/role/disclosureRef