Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Name:	us-gaap_ProceedsFromLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Note Payable (MidCap Loan) - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended
	Feb. 21, 2017	Mar. 31, 2017	May 29, 2015
CRG [Member]
Debt Instrument [Line Items]
License termination effective date		Feb. 21, 2017
Secured Loan Facility [Member] \| Mid Cap Financial Trust [Member]
Debt Instrument [Line Items]
Secured loan facility			$ 30.0
Net proceeds in aggregate amount	$ 29.4
Interest Expense [Member] \| Mid Cap Financial Trust [Member]
Debt Instrument [Line Items]
Deferred loan costs expensed		$ 0.7