Revenue Recognition - Accounts Receivable and Deferred Revenue (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Assets
Accounts receivable	$ 58,905	$ 62,223
Liabilities:
Deferred revenue, current portion	25,667	4,131
Deferred revenue, long-term portion	56,174	40,058
Total deferred revenues	81,841	44,189
Current accounts receivable	58,905	62,223
Other noncurrent assets	$ 12,679	$ 3,317
Evercord | Processing and storage services | Alternate
Liabilities:
Billing collection period (in months)	12 months
Evercord | Processing and storage services | Minimum
Liabilities:
Billing collection period (in months)	6 months
Evercord | Processing and storage services | Maximum
Liabilities:
Billing collection period (in months)	18 months
BGI
Liabilities:
Deferred revenue, current portion	$ 12,049
Deferred revenue, long-term portion	16,050
Total deferred revenues	28,099
Accounts receivable	$ 2,500