Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues [Abstract]
Total revenue	$ 86,006	$ 77,698
Cost of sales (exclusive of depreciation and amortization shown separately below):
Change in fair value of derivative warrants	(405)	(1,614)
Selling, general and administrative	18,259	18,434
Depreciation and amortization	11,924	12,479
Total operating expenses	83,520	91,355
Operating income (loss)	2,486	(13,657)
Interest expense	(2,210)	(1,891)
Interest income	381	580
Other income, net	175	2,670
Income (loss) from equity method investments	145	(467)
Income (loss) before income taxes	977	(12,765)
Income tax expense	(78)	(60)
Net income (loss)	899	(12,825)
Loss attributable to noncontrolling interest	805	1,879
Net Income (Loss) Attributable to Parent, Total	$ 1,704	$ (10,946)
Income (loss) per share:
Basic (in dollars per share)	$ 0.01	$ (0.05)
Diluted (in dollars per share)	$ 0.01	$ (0.05)
Weighted-average common shares outstanding:
Basic (in shares)	204,992,555	204,196,669
Diluted (in shares)	206,040,099	204,196,669
Product revenue
Revenues [Abstract]
Total revenue	$ 75,702	$ 68,448
Cost of sales (exclusive of depreciation and amortization shown separately below):
Cost of sales	46,673	54,430
Service revenue
Revenues [Abstract]
Total revenue	10,304	9,250
Cost of sales (exclusive of depreciation and amortization shown separately below):
Cost of sales	$ 6,259	$ 4,398