Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Components of Deferred Tax Assets [Abstract]
Accounts receivable	$ 31	$ 44
Accrued expenses	9,535	12,640
Inventory	243	491
Investment in partnership	8,696	9,537
Net operating losses	2,627	2,820
Operating lease liabilities	1,121
Tax credits	3,249	4,617
Share compensation	1,399	439
Other	1,685	1,229
Less: valuation allowance	(21,216)	(298)
Components of Deferred Tax Liabilities [Abstract]
Prepaid expenses	(689)	(828)
Property plant & equipment	(3,252)	(3,002)
Operating lease assets	(1,115)
Intangible assets	(3,814)	(55,983)
Total deferred income taxes	$ (1,500)	(28,294)
Vertical/Trigen Holdings, LLC [Member]
Components of Deferred Tax Liabilities [Abstract]
Ownership by parent (as a percent)	100.00%
Vertical/Trigen
Components of Deferred Tax Liabilities [Abstract]
Total deferred income taxes		$ (30,300)
Deferred Tax Assets, Net	$ 4,600