Warrants (Tables)

12 Months Ended

Dec. 31, 2021

Warrants

Summary of warrant activity

	December 31,
	2021	2020
Warrants outstanding, beginning balance	2,401,818	6,473,964
Issuances	168,750	7,349,426
Exercises	(2,007,117)	(11,421,464)
Expirations and cancelations	—	(108)
Warrants outstanding, ending balance	563,451	2,401,818