Acquisitions - Additional Information (Details)				3 Months Ended		12 Months Ended
	Dec. 31, 2021 USD ($) EarnoutPayment	Aug. 24, 2021 USD ($) shares	Feb. 29, 2020 USD ($) shares	Mar. 31, 2022 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($)
Business Acquisition [Line Items]
Goodwill	$ 12,666,000	$ 0				$ 12,666,000	$ 4,162,000
Share-based compensation arrangement by share-based payment award, options, grants in period, gross | shares						0
Share-based payment arrangement, expense						$ 8,131,000	1,759,000
Shares converted into common stock upon business combination | shares		4,865
Zenith
Business Acquisition [Line Items]
Cash consideration			$ 6,909,000
Promissory note consideration			974,000
Stock consideration			813,000
Settlement of preexisting relationships			1,158,000
Business combination, consideration transferred			9,854,000
Goodwill			$ 4,162,000
Share-based compensation arrangement by share-based payment award, options, grants in period, gross | shares		844	844,000
Share-based compensation arrangement by share-based payment award, award vesting period			3 years
Business combination, liabilities arising from contingencies, amount recognized			$ 3,353,000
Share-based payment arrangement, expense						502,000	707,000
Shares converted into common stock upon business combination | shares		4,123
Business combination, acquisition related costs					$ 21,000	0
Business acquisition, pro forma revenue						2,565,000	2,259,000
Business acquisition, pro forma net income (loss)						819,000	$ 420,000
Accounts receivable			$ 518,000
iQuue
Business Acquisition [Line Items]
Cash consideration	6,192,000
Business combination, consideration transferred	12,951,000
Goodwill	8,504,000					8,504,000
Business combination, acquisition related costs						314,000
Cash and restricted cash consideration	7,213,000
Estimated fair market value of contingent consideration	$ 5,230,000
Number of earnout payments | EarnoutPayment	3
Networking capital adjustment	$ 508,000
Cash placed in escrow accounts	1,021,000
Maximum value of earnout payments	$ 6,375,000
Period over which amount of consideration payable to former shareholders	3 years
Post-combination expense, service period	3 years
Cash deposited in escrow	$ 742,000					742,000
Accounts receivable	721,000					721,000
Gross amount due under contracts for accounts receivable expected to be collected	721,000					721,000
Intangible assets	3,590,000					3,590,000
iQuue | Maximum
Business Acquisition [Line Items]
Amount agreed to pay to former shareholders	$ 742,000					$ 742,000
iQuue | Forecast
Business Acquisition [Line Items]
Networking capital adjustment				$ 508,000