Subsequent Events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended
Jan. 31, 2017	Dec. 31, 2016
AquaBounty Technologies, Inc. \| Subsequent Event
Subsequent Event [Line Items]
Additional equity interest purchased by parent	$ 25,000
Additional equity interest purchased by parent (in shares)	2,421,073
AquaBounty Technologies, Inc. \| Subsequent Event
Subsequent Event [Line Items]
Noncash dividend, shares	1,776,557
GenVec, Inc. \| Subsequent Event
Subsequent Event [Line Items]
Number of shares of common stock to be issued per share of acquiree's common stock	0.297
Calculated value of share of acquiree's common stock (in usd per share)	$ 7.00
Period used to calculate volume weighted average price	5 days
Percent of collaboration payments	50.00%
Period during which a portion of collaboration payments received will be paid to former stockholders of acquiree	3 years
AquaBounty Technologies, Inc.
Subsequent Event [Line Items]
Parent ownership interest		70.00%
AquaBounty Technologies, Inc. \| Subsequent Event
Subsequent Event [Line Items]
Parent ownership interest	58.00%

Number of shares of common stock issued as dividends during the period. Excludes stock splits.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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Represents the purchase by the parent of an additional equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The purchase of the additional equity interest represented by this element increases the parent's controlling interest in the subsidiary.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4M
-URI http://asc.fasb.org/extlink&oid=65897068&loc=SL4591554-111686

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=64809438&loc=SL4573702-111684

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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The period of used to calculate the volume weighted average price used to calculate the value per share of the acquiree to be paid as consideration to acquire the entity.

+ References

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The value per share of the acquiree to be paid as consideration to acquire the entity.

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Number of shares of equity interested issued or issuable per share of acquiree to acquire entity.

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- Definition

The period subsequent to the acquisition during which a portion of collaboration payments received from previously existing collaborations will be paid to former stockholders of the acquired entity.

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Percent of collaboration payments received pursuant to a collaboration agreement for upfront fees, milestones and royalties which will be paid to another party.

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Represents the shares issued by the parent for purchase by the parent of an additional equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The purchase of the additional equity interest represented by this element increases the parent's controlling interest in the subsidiary.

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