Consolidated Income Statements (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Gross sales	$ 175,196	$ 147,214	$ 333,416	$ 286,344
Commissions, allowances and rebates	331	192	618	401
Net sales	174,865	147,022	332,798	285,943
Other revenues, net	1,985	5,024	3,508	7,200
Net revenue	176,850	152,046	336,306	293,143
Total cost of goods sold	114,022	87,254	218,595	177,496
Gross profit	62,828	64,792	117,711	115,647
Operating expenses:
Selling, general and administrative expenses	25,695	15,668	50,736	32,523
Research and development expenses	3,678	4,133	7,140	7,752
Acquisition and integration expenses	562	339	6,618	339
Total operating expenses	29,935	20,140	64,494	40,614
Operating profit	32,893	44,652	53,217	75,033
Other expenses/(income):
Interest expense, net	5,746	17	11,370	99
Unrealized loss/(gain) on investment in equity securities	3,235	(5,146)	3,804	(5,146)
Other expenses, net	353	181	425	445
Income before income taxes	23,559	49,600	37,618	79,635
Provision for income taxes	7,872	8,748	11,404	14,534
Income from continuing operations	15,687	40,852	26,214	65,101
Loss from discontinued operations, net of tax	(69)	(433)	(187)	(624)
Net income	$ 15,618	$ 40,419	$ 26,027	$ 64,477
Basic earnings/(loss) per share of common stock:
Income from continuing operations	$ 0.47	$ 1.23	$ 0.78	$ 1.97
Loss from discontinued operations, net of tax	0.00	(0.01)	(0.01)	(0.02)
Net income	0.46	1.22	0.77	1.95
Diluted earnings/(loss) per share of common stock:
Income from continuing operations	0.46	1.21	0.78	1.94
Loss from discontinued operations, net of tax	0.00	(0.01)	0.00	(0.02)
Net income	$ 0.46	$ 1.20	$ 0.77	$ 1.92
Weighted average shares outstanding:
Basic	33,657	33,085	33,645	32,990
Effect of dilutive stock based compensation	116	557	122	628
Diluted	33,773	33,642	33,767	33,618
Product Sales [Member]
Gross sales	$ 145,273	$ 142,993	$ 269,518	$ 278,452
Total cost of goods sold	89,719	83,557	168,524	170,140
Service Revenue [Member]
Gross sales	29,923	4,221	63,898	7,892
Total cost of goods sold	$ 24,303	$ 3,697	$ 50,071	$ 7,356