Business Combinations - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands							3 Months Ended		12 Months Ended
	Jan. 15, 2021	Aug. 04, 2020	May 27, 2020	Mar. 19, 2020	Feb. 25, 2020	Feb. 07, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Business Acquisition [Line Items]
Cash paid net of cash acquired							$ 32,401	$ 34,941
Contingent consideration							19,331		$ 10,619
Cash paid							$ 32,401	$ 34,941
Common stock reserved for future issuance							5,900,000
Red Sky Technologies Inc.
Business Acquisition [Line Items]
Date of acquisition of business	Jan. 15, 2021
Total purchase price net of cash acquired	$ 55,400
Cash paid net of cash acquired	$ 32,400						$ 32,401
Number of newly issued common stock	162,820
Common stock price per share	$ 141.46
Contingent payment	$ 30,000
Contingent consideration	9,135
Weighted average useful life of identified acquired intangible assets							7 years 8 months 26 days
Total purchase price							$ 64,568
Cash paid	$ 32,400						32,401
Red Sky Technologies Inc. | Maximum | General and Administrative Expenses
Business Acquisition [Line Items]
Business acquisition transaction costs							$ 100
Red Sky Technologies Inc. | Acquired Technology
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets							3 years
Red Sky Technologies Inc. | Customer Relationships
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets							9 years
Red Sky Technologies Inc. | Trade Names
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets							4 years
Connexient
Business Acquisition [Line Items]
Date of acquisition of business						Feb. 07, 2020
Cash paid net of cash acquired						$ 11,500
Number of newly issued common stock						96,611
Common stock price per share						$ 93.32
Contingent payment						$ 6,000
Total purchase price						20,200
Cash paid						$ 11,500
CNL Software Limited
Business Acquisition [Line Items]
Date of acquisition of business					Feb. 25, 2020
Cash paid net of cash acquired					$ 19,800
Number of newly issued common stock					153,217
Common stock price per share					$ 104.10
Total purchase price					$ 35,700
Cash paid					$ 19,800
One2Many Group B.V.
Business Acquisition [Line Items]
Date of acquisition of business				Mar. 19, 2020
Cash paid net of cash acquired				$ 5,500
Number of newly issued common stock				52,113
Common stock price per share				$ 104.95
Contingent payment				$ 15,000
Contingent consideration				2,200
Total purchase price				13,100
Cash paid				5,500
Purchase liabilities				$ 2,000
Change in fair value of contingent consideration obligation							$ (700)
One2Many Group B.V. | General and Administrative Expenses
Business Acquisition [Line Items]
Change in fair value of contingent consideration obligation							(700)
Techwan SA
Business Acquisition [Line Items]
Date of acquisition of business			May 27, 2020
Cash paid net of cash acquired			$ 9,400				$ 9,301
Number of newly issued common stock			38,425
Common stock price per share			$ 132.05
Contingent payment			$ 7,000
Contingent consideration			2,030
Weighted average useful life of identified acquired intangible assets							7 years 5 months 19 days
Total purchase price			15,500				$ 17,300
Cash paid			9,400				$ 9,301
Purchase liabilities			$ 100
Common stock reserved for future issuance			6,779
Techwan SA | General and Administrative Expenses
Business Acquisition [Line Items]
Business acquisition transaction costs									200
Techwan SA | Acquired Technology
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets							3 years
Techwan SA | Customer Relationships
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets							9 years
Techwan SA | Trade Names
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets							3 years
SnapComms Limited
Business Acquisition [Line Items]
Date of acquisition of business		Aug. 04, 2020
Cash paid net of cash acquired		$ 13,600					$ 10,090
Number of newly issued common stock		121,858
Common stock price per share		$ 145.13
Contingent payment		$ 5,000
Contingent consideration		2,047
Weighted average useful life of identified acquired intangible assets							7 years 9 months 25 days
Total purchase price		34,400					$ 32,971
Cash paid		13,600					10,090
Change in fair value of contingent consideration obligation							700
Contingent consideration expect to pay		$ 3,300
SnapComms Limited | General and Administrative Expenses
Business Acquisition [Line Items]
Business acquisition transaction costs									$ 100
Change in fair value of contingent consideration obligation							$ 700
SnapComms Limited | Acquired Technology
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets							3 years
SnapComms Limited | Customer Relationships
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets							9 years
SnapComms Limited | Trade Names
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets							3 years