Segments - Reconciles Segments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA									$ 60,675	$ 41,539	$ 22,307
Depreciation									(9,139)	(6,657)	(2,348)
Amortization									(5,994)	(5,210)	(1,052)
Interest									(14,495)	(8,022)	(1,563)
Acquisition costs									(6,147)	(3,787)	(1,965)
Stock based compensation expense									(7,355)	(3,812)	(447)
Purchase accounting adjustment to inventory									(4,805)	(2,149)
Non same-store revenue									8,088	3,967
Non same-store costs									(19,553)	(10,345)
Fair value adjustment of contingent note									(7,320)	(3,280)
Integration costs and costs of discontinued clinics									(3,788)	(998)
Clinic launch expenses									(767)	(1,380)
Non-recurring royalty settlement										(440)
SKU Rationalization									(6,482)		(610)
Costs associated with becoming a public company											(2,710)
Supplier receivable write-off											175
Litigation expenses									(529)
Pretax net (loss) income									(17,611)	(574)	11,787
Income tax benefit (expense)									3,309	661	(3,970)
Net (loss) income	$ (13,752)	$ (8,796)	$ 5,918	$ 2,326	$ (5,256)	$ 3,902	$ 5,398	$ (3,957)	(14,302)	87	7,817
Products | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA									73,537	52,185	30,836
Services | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA									20,045	15,246
Unallocated Corporate | Corporate, Non-Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBITDA									$ (32,907)	$ (25,892)	$ (8,529)