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).

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Condensed Consolidated Balance Sheets - 10Q - USD ($)	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 419,152			$ 341,037				$ 226,603
Prepaid expenses and other	18,379			8,672				13,004
Total current assets	437,531			349,709				239,607
Deferred offering costs	1,821,773			117,631				33,941
Total assets	2,259,304			467,340				273,548
Current liabilities:
Convertible promissory notes	0			5,829,292				21,227,093
Note payable—current	0			55,014				0
Accounts payable	3,083,420			2,707,861				2,067,901
Accrued expenses and other current liabilities	1,325,194			955,989				197,472
Total current liabilities	4,408,614			9,548,156				24,108,304
Note payable—noncurrent	0			69,040				0
Total liabilities	4,408,614			9,617,196				24,108,304
Commitments and Contingencies (Note 8)
Convertible preferred stock and redeemable common stock:
Temporary equity, carrying amount	21,064,623			7,771,223				126,000
Stockholders’ deficit:
Common stock, 331,789 and 324,145 issued and outstanding at December 31, 2020 and 2019, respectively	348			332				324
Additional paid-in capital	2,948,294			1,876,159				1,480,955
Accumulated deficit	(26,162,575)			(18,797,570)				(25,442,035)
Total stockholders’ deficit	(23,213,933)	$ (22,304,859)	$ (17,478,072)	(16,921,079)	$ (16,217,752)	$ (15,394,853)	$ (22,994,309)	(23,960,756)	$ (18,390,842)
Total liabilities, convertible preferred stock, redeemable common stock and stockholders’ deficit	2,259,304			467,340				273,548
Series A Preferred Stock
Convertible preferred stock and redeemable common stock:
Temporary equity, carrying amount	14,641,005	14,641,005	9,992,208	1,400,935	568,637	142,157	0	0	0
Series Seed Preferred Stock
Convertible preferred stock and redeemable common stock:
Temporary equity, carrying amount	6,341,288	6,341,288	6,341,288	6,341,288	6,341,288	6,341,288	0	0	0
Redeemable Common Stock
Convertible preferred stock and redeemable common stock:
Temporary equity, carrying amount	$ 82,330	$ 82,330	$ 29,000	$ 29,000	$ 32,000	$ 31,000	$ 113,000	$ 126,000	$ 165,000