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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenue	$ 47,214,000	$ 30,565,000
Cost of revenue	11,730,000	8,611,000
Gross profit	35,484,000	21,954,000
Operating expenses:
Research and development	6,756,000	4,019,000
Selling, general and administrative	36,705,000	28,577,000
Total operating expenses	43,461,000	32,596,000
Loss from operations	(7,977,000)	(10,642,000)
Interest expense	(409,000)	(858,000)
Other income, net	379,000	383,000
Loss before income taxes	(8,007,000)	(11,117,000)
Income tax provision	12,000	0
Net loss	$ (8,019,000)	$ (11,117,000)
Net loss per common share, basic and diluted	$ (0.33)	$ (0.47)
Weighted-average shares, basic and diluted	24,474,308	23,479,955

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