Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenues	$ 76,474	$ 74,823
Cost of goods sold	42,773	39,054
Gross profit	33,701	35,769
Operating expenses
Sales and marketing expenses	9,307	9,072
General and administrative expenses	9,513	9,123
Research and development expenses	3,036	6,196
Total operating expenses	21,856	24,391
Gain on sale of assets	5,828
Operating income	17,673	11,378
Interest expense, net	(7,018)	(10,623)
Other income (expense), net	58	(383)
Income before income taxes	10,713	372
Provision (benefit) for income taxes	390	(3)
Net income	$ 10,323	$ 375
Net income per common share:
Basic and diluted	$ 0.34	$ 0.02
Common shares:
Basic	30,368,240	18,080,944
Diluted	30,372,691	18,404,393