Goodwill and Intangible Assets, Net - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Goodwill impairment charge	$ (13,823,000)	$ 0
Accumulated impairment losses		0
Impairment charge	2,950,000
Amortization expense	19,194,000	$ 15,185,000	$ 9,871,000
AquaBounty Technologies, Inc.
Goodwill [Line Items]
Goodwill impairment charge	$ (13,001,000)