Annual report pursuant to Section 13 and 15(d)

Collaboration and Stock Purchase Agreements (Schedule of Assets and Liabilities of Caelum) (Details)

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Collaboration and Stock Purchase Agreements (Schedule of Assets and Liabilities of Caelum) (Details) - Caelum [Member] - Alexion [Member]
$ in Thousands
Jan. 31, 2019
USD ($)
Current assets  
Cash and cash equivalents $ 1,201
Prepaid expenses and other current assets 6
Total current assets 1,207
Current liabilities  
Accounts payable and accrued expenses 2,246
Interest payable 198
Interest payable - related party 106
Note payable - related party 929
Note payable 9,914
Warrant liability 991
Total current liabilities 14,384
Net liability impacted by deconsolidation $ 13,177