Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenues	$ 81,359	$ 76,474
Cost of goods sold	41,597	42,773
Gross profit	39,762	33,701
Operating expenses
Sales and marketing	10,214	9,307
General and administrative	12,270	9,513
Research and development	5,351	3,036
Total operating expenses	27,835	21,856
Gain on sale of assets	0	5,828
Operating income	11,927	17,673
Interest expense	(5,420)	(7,024)
Loss on extinguishment of debt	(2,161)	0
Other income	577	64
Income before income taxes	4,923	10,713
Provision for income taxes	785	390
Net income	$ 4,138	$ 10,323
Net income per common share outstanding:
Basic	$ 0.11	$ 0.34
Diluted	$ 0.11	$ 0.34
Weighted-average common shares outstanding:
Basic	36,888,718	30,368,240
Diluted	38,601,356	30,372,691