Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2014

Percentage of Revenue from Significant Customers

Revenue from significant customers as a percentage of the Company’s total revenue is as follows:

	Three months ended March 31,
	2014			2013
Upfront payment from sale of intellectual property to BioMarin		12	%		—
Orencia® Royalties from Bristol		—			24	%
Bioprocessing Customer A		40	%		38	%
Bioprocessing Customer B		22	%		12	%
Bioprocessing Customer C		14	%		15	%

Total Revenue

Percentage by Geographic Area or Significant Customers

The following table represents the Company’s total revenue by geographic area (based on the location of the customer):

	Three months ended March 31,
	2014			2013
United States		49	%		47	%
Sweden		32	%		39	%
United Kingdom		18	%		12	%
Other		1	%		2	%
		100	%		100	%

Accounts Receivable

Percentage by Geographic Area or Significant Customers

Significant accounts receivable balances as a percentage of the Company’s total trade accounts receivable and royalties and other receivables balances are as follows:

	March 31, 2014			December 31, 2013
Orencia® Royalties from Bristol		—			42	%
Bioprocessing Customer A		58	%		17	%
Bioprocessing Customer B		22	%		8	%
Tenant improvement allowance due from landlord		—			15	%