Contingent Consideration - Summary of Financial Instruments (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($) contingent_consideration shares	Mar. 31, 2021 shares	Dec. 31, 2021 USD ($) shares	Jun. 11, 2021 USD ($)
Fair Value Measurements
Contingent consideration	$ 868		$ 999
Number of contingent considerations | contingent_consideration	3
Common Stock
Fair Value Measurements
Common stock issuance for acquisition (in shares) | shares		10,181,299
DBOT
Fair Value Measurements
Contingent consideration	$ 649		$ 649
DBOT | Common Stock
Fair Value Measurements
Common stock issuance for acquisition (in shares) | shares	0		11,300,000
Tree Technologies
Fair Value Measurements
Contingent consideration	$ 119		$ 250
Solectrac
Fair Value Measurements
Contingent consideration	100		100	$ 2,400
Level I
Fair Value Measurements
Contingent consideration	0		0
Level I | DBOT
Fair Value Measurements
Contingent consideration	0		0
Level I | Tree Technologies
Fair Value Measurements
Contingent consideration	0		0
Level I | Solectrac
Fair Value Measurements
Contingent consideration	0		0
Level II
Fair Value Measurements
Contingent consideration	0		0
Level II | DBOT
Fair Value Measurements
Contingent consideration	0		0
Level II | Tree Technologies
Fair Value Measurements
Contingent consideration	0		0
Level II | Solectrac
Fair Value Measurements
Contingent consideration	0		0
Level III
Fair Value Measurements
Contingent consideration	868		999
Level III | DBOT
Fair Value Measurements
Contingent consideration	649		649
Level III | Tree Technologies
Fair Value Measurements
Contingent consideration	119		250
Level III | Solectrac
Fair Value Measurements
Contingent consideration	$ 100		$ 100