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Debt - Additional Information (Detail) - Cerus Term Loans |  | 9 Months Ended
--- | --- | ---
Jun. 30, 2014 USD ($) Tranche | Sep. 30, 2015
Line of Credit Facility [Line Items] |  |
Maximum borrowing limit | $ 30,000,000 |
Term of agreement | 5 years |
Number of loan tranches | Tranche | 3 |
Interest rate, description |  | Term Loan A bears an interest rate of 6.95%. Term Loan B bears an interest rate of 7.01%. Term Loan C will bear an interest rate calculated at the greater of 6.95% or 6.72% plus the three month U.S. LIBOR rate in effect three business days prior to the funding date.
Maturity period |  | Jun. 01, 2019
Principal and interest payments | 36 months |
Final payment term percent | 7.00% |
Terms of required periodic payments of interest and principal |  | The Company is required to make interest only payments through June 2016 followed by thirty-six months of equal principal and interest payments thereafter; however, if the Revenue Event is achieved no later than May 31, 2016, then the interest-only period may be extended through December 31, 2016, and the amortization period will be reduced to thirty months. The Company is also required to make a final payment equal to 7% of the principal amounts of the Term Loans drawn payable on the earlier to occur of maturity or prepayment.
Securities Pledged as Collateral |  |
Line of Credit Facility [Line Items] |  |
Percentage of investments made in subsidiary | 35.00% |
First Tranche (Term Loan A) |  |
Line of Credit Facility [Line Items] |  |
Loan and security agreement | $ 10,000,000 |
Interest rate | 6.95% |
Second Tranche (Term Loan B) |  |
Line of Credit Facility [Line Items] |  |
Loan and security agreement | $ 10,000,000 |
Borrowing conditions |  | The second tranche of $10.0 million ("Term Loan B") was drawn on June 15, 2015.
Interest rate |  | 7.01%
Third Tranche (Term Loan C) |  |
Line of Credit Facility [Line Items] |  |
Loan and security agreement | $ 10,000,000 |
Borrowing conditions |  | As amended, the third tranche of $10.0 million ("Term Loan C") would be available, subject to the Company achieving consolidated trailing six months' revenue at a specified threshold (the "Revenue Event")
Interest rate, minimum |  | 6.95%
Interest rate plus the three month U.S. LIBOR |  | 6.72%

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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