Accounts receivable, net and other receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other receivables
Receivables From Collaborative Arrangements	$ 2,426
Research premium	1,308	$ 1,530
Other receivables	175	1,214
Total accounts receivable, net and other receivables	$ 3,909	$ 2,744

Carrying amount as of the balance sheet date of amounts due under research premium. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

No definition available.

Name:	nbrv_ResearchPremiumReceivableCurrent
Namespace Prefix:	nbrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant