Acquisitions - DoseMe (Details) - USD ($) $ in Thousands		3 Months Ended					6 Months Ended
	Jan. 02, 2019	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Acquisition
Total revenue		$ 76,834			$ 76,255		$ 149,661	$ 137,214
Net loss		(14,310)	$ (14,437)		(6,529)	$ (10,979)	(28,747)	(17,508)
Amortization expense		6,823			7,084		13,645	11,751
DoseMe
Acquisition
Cash consideration	$ 10,000
Issuance of common stock (in shares)	149,053
Cash payment for acquisition-related contingent consideration				$ 8,750
Total revenue					$ 72			$ 138
Revenue from Contract with Customer, Product and Service					us-gaap:ServiceMember			us-gaap:ServiceMember
Net loss					$ (769)			$ (1,995)
Amortization expense					579			1,141
Service
Acquisition
Total revenue		$ 37,461			$ 42,883		$ 73,201	$ 72,860