Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash	$ 25,837	$ 33,364
Prepaid expenses	308	168
Total current assets	26,145	33,532
Property and equipment, net	41	2
Right-of-use asset	218
Other assets	21
Total assets	26,425	33,534
Current liabilities:
Accounts payable	1,981	708
Accrued liabilities	1,614	280
Warrant liabilities	1,062	10,796
Lease liability, short-term	65
Total current liabilities	4,722	11,784
Lease liability, long-term	153
Total liabilities	4,875	11,784
Commitments and contingencies (Note 4)
Stockholders' equity
Preferred stock, $0.001 par value per share; 10,000,000 shares authorized as of September 30, 2023 and December 31, 2022; no shares issued or outstanding as of September 30, 2023 and December 31, 2022.
Common stock, $0.001 par value per share, 100,000,000 shares authorized as of September 30, 2023 and December 31, 2022; 38,429,185 and 25,436,019 shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively.	38	25
Additional paid-in capital	124,463	117,520
Accumulated deficit	(102,951)	(95,795)
Total stockholders' equity	21,550	21,750
Total liabilities and stockholders' equity	$ 26,425	$ 33,534

Amount of long-term debt and lease obligation other than convertible debt, classified as noncurrent.

No definition available.

Name:	nrbo_LongTermDebtAndLeaseObligationOtherThanConvertibleNotes
Namespace Prefix:	nrbo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).