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Accrued Expenses and Other Current Liabilities (Tables)
 6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Schedule of Accrued Liabilities [Table Text Block]
 June 30,
2020		December 31,
2019
Board compensation$— $209 
Other3 21 
Total accrued expenses and other current liabilities$3 $230 
(In thousands $)December 31,
2019		December 31,
2018
Professional fees$— $85 
Accrued board compensation209 181 
Research and development— 91 
Deferred rent— 10 
Other accrued expenses21 16 
Total accrued expenses and other current liabilities$230 $383