Condensed Statements of Changes in Stockholders' Deficit - USD ($)	Common stock	Additional paid-in capital [Member]	Accumulated deficit [Member]	Total
Balance at Dec. 31, 2020	$ 133,442	$ 105,934,572	$ (108,891,958)	$ (2,823,944)
Balance (Shares) at Dec. 31, 2020	133,441,788
Issuance of common stock - option exercises (in value)	$ 105	21,945	0	22,050
Issuance of common stock - option exercises (in shares)	105,000
Share-based compensation expense	$ 0	61,744	0	61,744
Net loss	0	0	(379,692)	(379,692)
Balance at Mar. 31, 2021	$ 133,547	106,018,261	(109,271,650)	(3,119,842)
Balance (Shares) at Mar. 31, 2021	133,546,788
Balance at Dec. 31, 2021	$ 143,550	108,116,284	(110,489,713)	$ (2,229,879)
Balance (Shares) at Dec. 31, 2021	143,549,735
Issuance of common stock - option exercises (in shares)				0
Share-based compensation expense	$ 0	87,621	0	$ 87,621
Net loss	0	0	(424,065)	(424,065)
Balance at Mar. 31, 2022	$ 143,550	$ 108,203,905	$ (110,913,778)	$ (2,566,323)
Balance (Shares) at Mar. 31, 2022	143,549,735

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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REGENERX BIOPHARMACEUTICALS INC 10-Q