Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue:
Total revenue	$ 33,079	$ 23,286
Cost of revenue:
Total cost of revenue	15,047	10,946
Gross profit	18,032	12,340
Operating expenses:
Research and development	2,981	2,387
Selling, general and administrative	16,422	14,935
Total operating expenses	19,403	17,322
Operating loss	(1,371)	(4,982)
Interest expense	(1,061)	(661)
Other income	76	104
Net loss	$ (2,356)	$ (5,539)
Net loss per common share, basic and diluted	$ (0.01)	$ (0.03)
Weighted average common shares outstanding, basic and diluted	165,429	160,446
Product sales [Member]
Revenue:
Total revenue	$ 27,097	$ 18,300
Cost of revenue:
Total cost of revenue	14,014	10,568
Licensing and Development Revenue [Member]
Revenue:
Total revenue	1,755	915
Royalties [Member]
Revenue:
Total revenue	4,227	4,071
Cost of development revenue [Member]
Cost of revenue:
Total cost of revenue	$ 1,033	$ 378