Revenue Recognition (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained deficit	$ (548,652)		$ (544,010)
Revenue	43,145	$ 39,472
Long-term accounts receivable			$ 300
Deferred revenue	$ 6,700

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as noncurrent.

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

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