Summary of Significant Accounting Policies - Opening and Closing Balances of the Company's Contract Assets and Deferred Revenue (Details) $ in Thousands	12 Months Ended
Dec. 31, 2019 USD ($)
Contract assets, current portion
Beginning balance	$ 145
Ending balance	496
Increase	351
Contract assets
Beginning balance	2,845
Ending balance	3,216
Increase	371
Deferred revenue, current portion
Beginning balance	12,322
Ending balance	14,991
Increase	2,669
Deferred revenue
Beginning balance	18,084
Ending balance	27,852
Increase	$ 9,768

Change In Contract With Customer, Asset, Current [Roll Forward]

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Change In Contract With Customer, Asset, Noncurrent [Roll Forward]

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Change In Deferred Revenue, Current [Roll Forward]

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Change In Deferred Revenue, Noncurrent [Roll Forward]

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- Definition

Contract With Customer, Asset, Current, Increase (Decrease) In Period

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Contract With Customer, Asset, Noncurrent, Increase (Decrease) In Period

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Increase (Decrease) in Contract With Customer Liability, Net, Current

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Increase (Decrease) in Contract With Customer Liability, Net, Noncurrent

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

+ References

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent.

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