Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2026	Dec. 31, 2025
Current assets:
Cash, restricted cash, and cash equivalents	$ 530,681	$ 1,662,380
Prepaid expenses and other current assets	444,322	1,071,900
Total current assets	975,003	2,734,280
Restricted cash	120,000
Operating lease right-of-use assets, net	662,188	660,706
Property and equipment, net	71,312	246,148
Total assets	1,828,503	3,641,134
Current liabilities:
Notes payable, net	8,126,403
Accounts payable	7,606,011	7,580,899
Accrued liabilities	456,545	363,811
Insurance payable	6,019	338,279
Operating lease liability	308,616	699,107
Preferred stock liabilities - Series E convertible preferred stock, $0.0001 par value; 10,000 shares authorized; 3,552 shares issued and outstanding at September 30, 2026; liquidation preference of $4,440,000 at September 30, 2026	3,729,600
Earnout liability	500	20,000
Deemed dividend – common stock liability, 692 shares	85,500	85,500
Total current liabilities	20,319,194	9,087,596
Long-term liabilities:
Operating lease liability, net of current portion	354,162
Total liabilities	20,673,356	9,087,596
Commitments and contingencies (Note 14)
Stockholders’ deficit:
Preferred stock, par value $0.0001; authorized 10,000,000 shares:
Additional paid-in capital	69,674,450	78,126,104
Stock subscription receivable	(9,857)
Accumulated deficit	(93,733,747)	(90,838,115)
Total stockholders’ deficit	(18,844,853)	(5,446,462)
Total liabilities and stockholders’ deficit	1,828,503	3,641,134
Series D Convertible Preferred Stock
Stockholders’ deficit:
Preferred stock, par value $0.0001; authorized 10,000,000 shares:	3,926,723	4,047,699
Series E Convertible Preferred Stock
Stockholders’ deficit:
Preferred stock, par value $0.0001; authorized 10,000,000 shares:		1,926,133
Series C Convertible Preferred Stock
Stockholders’ deficit:
Preferred stock, par value $0.0001; authorized 10,000,000 shares:	2,292	2,292
Series A Convertible Preferred Stock
Stockholders’ deficit:
Preferred stock, par value $0.0001; authorized 10,000,000 shares:	1,287,315	1,287,315
Class A Common Stock
Stockholders’ deficit:
Class A common stock; $0.0001 par value; 1,000,000,000 shares authorized; 79,709,742 and 21,102,671 shares issued and outstanding at September 30, 2026 and December 31, 2025, respectively	$ 7,971	$ 2,110

Represents the amount of earnout liability.

No definition available.

Name:	cero_EarnoutLiabilityCurrent
Namespace Prefix:	cero_
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).