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Revenue recognition (Tables)
 6 Months Ended
Jun. 30, 2023
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue The Company's revenues disaggregated by the major sources were as follows:
Three Months Ended June 30, 2023Three Months Ended June 30, 2022
USGNon-USG TotalUSGNon-USG Total
Product sales, net$150.5 $151.7 $302.2 $118.2 $119.0 $237.2 
CDMO:
Services— 26.4 26.4 — 2.7 2.7 
Leases— 2.7 2.7 — (4.5)(4.5)
Total CDMO$— $29.1 $29.1 $— $(1.8)$(1.8)
Contracts and grants4.6 2.0 6.6 6.2 1.1 7.3 
Total revenues$155.1 $182.8 $337.9 $124.4 $118.3 $242.7 
Six Months Ended June 30, 2023Six Months Ended June 30, 2022
USGNon-USG TotalUSGNon-USG Total
Product sales, net$176.6 $269.0 $445.6 $221.6 $252.7 $474.3 
CDMO:
Services— 39.8 39.8 — 54.5 54.5 
Leases— 4.5 4.5 — 4.5 4.5 
Total CDMO$— $44.3 $44.3 $— $59.0 $59.0 
Contracts and grants9.5 3.6 13.1 15.3 1.6 16.9 
Total revenues$186.1 $316.9 $503.0 $236.9 $313.3 $550.2 
Rollforward of Contract Liabilities The following table presents the roll forward of the contract liability balances:
Contract Liabilities
Balance at December 31, 2022$31.7 
Balance at June 30, 2023$19.3 
Revenue recognized in the period from amounts included in contract liability at the beginning of the period:$(6.8)
Schedule of Accounts Receivable, Net
Accounts receivable, including unbilled accounts receivable contract assets, consist of the following:
June 30, 2023December 31, 2022
Accounts receivable:
Billed$238.5 $102.7 
Unbilled51.8 56.4 
Allowance for expected credit losses(0.2)(0.7)
Accounts receivable, net$290.1 $158.4