Common stock warrants (Tables)

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of common stock warrants

The following table summarizes Series B and Series D common stock warrants as of each period:

	Series B			Series D			B and D Total
Outstanding at December 31, 2021		87,456			6,252,954		6,340,410
Issued		-			-		-
Exercised		(87,456	)		(2,954	)	(90,410	)
Outstanding at December 31, 2022		-			6,250,000		6,250,000
Issued		-			-		-
Exercised		-			-		-
Outstanding at March 31, 2023		-			6,250,000		6,250,000

Series E, F, G, and H warrants were issued for investment banking and advisory services during 2009. Series E, F, and G warrants were exercised in 2014. On November 14, 2022, the 275,647 Series H Warrants of Lenox Hill Partners, LLC were cancelled pursuant to a Settlement Agreement. As of December 31, 2022, there were 413,512 Series H ($7) Warrants outstanding. The following table summarizes Series H ($7) warrants as of each period:

	Series H $7.00 exercise price
Outstanding at December 31, 2021		689,159
Issued		-
Canceled		275,647
Exercised		-
Outstanding at December 31, 2022		413,512
Issued		-
Exercised		-
Outstanding at March 31, 2023		413,512