Business Acquisition - Allocation of the purchase price to the assets acquired and liabilities assumed (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Assets acquired:
Goodwill	$ 9,934
Aceragen
Assets acquired:
Cash, cash equivalents and restricted cash	5,482
Receivables	1,914
Prepaid expenses and other assets	575
In-process research and development assets	63,067
Goodwill	9,934
Total assets acquired	80,972
Liabilities assumed:
Accounts Payable and accrued expenses	7,827
Acquisition Obligation (Note 7)	7,476
Operating lease liabilities	22
Deferred tax liabilities	9,934
Total liabilities assumed	25,259
Net assets acquired	$ 55,713