CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 38,485	$ 30,432
Short-term investments	190,202	73,143
Accounts receivable, net	11,539	11,996
Inventories, net	20,373	13,320
Prepaid expenses and other current assets	9,427	4,032
Total current assets	270,026	132,923
Property and equipment, net	7,385	4,776
Operating lease right-of-use asset	7,024	6,645
Restricted cash	100	100
Deferred offering costs		5,051
Long-term investments	45,328
Other long-term assets	183	150
Total assets	330,046	149,645
Current liabilities:
Accounts payable	4,461	2,852
Accrued expenses and other current liabilities	17,605	15,828
Operating lease liabilities	1,980	1,529
Deferred revenue	1,342	939
Total current liabilities	25,388	21,148
Operating lease liabilities, net of current portion	5,707	5,726
Deferred revenue, net of current portion	2,986	1,860
Warrant liabilities		44,898
Other long-term liabilities	1,205
Total liabilities	35,286	73,632
Commitments and contingencies (Note 17)
Convertible preferred stock (Series A, A-2, B, B-2, C, D and E), par value of $0.0001 per share; no and 34,966,547 shares authorized at September 30, 2025 and December 31, 2024, respectively; no and 17,228,954 shares issued and outstanding at September 30, 2025 and December 31, 2024, respectively; liquidation preference of $0 and $355,162 at September 30, 2025 and December 31, 2024, respectively		321,373
Stockholders' equity (deficit):
Common stock	4
Preferred stock
Additional paid-in capital	650,873	51,311
Accumulated other comprehensive income	354	65
Accumulated deficit	(356,471)	(296,737)
Total stockholders' equity (deficit)	294,760	(245,360)
Total liabilities, convertible preferred stock and stockholders' equity (deficit)	330,046	149,645
Class A Common Stock
Stockholders' equity (deficit):
Common stock		1
Class B Common Stock
Stockholders' equity (deficit):
Common stock
Class C Common Stock
Stockholders' equity (deficit):
Common stock

Warrant liabilities noncurrent.

No definition available.

Name:	bbnx_WarrantLiabilitiesNoncurrent
Namespace Prefix:	bbnx_
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).