Consolidated Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue
Total revenue	$ 19,468	$ 19,593	$ 35,943	$ 40,237
Cost of revenue	8,450	9,971	17,711	20,784
Gross profit	11,018	9,622	18,232	19,453
Operating expenses
Sales and marketing	4,102	6,897	10,665	15,078
Research and development	2,738	3,328	5,728	6,240
General and administrative	6,474	5,289	12,210	10,618
Total operating expenses	13,314	15,514	28,603	31,936
Loss from operations	(2,296)	(5,892)	(10,371)	(12,483)
Other income and expenses
Interest income	23	91	58	198
Interest expense	(584)	(1,337)	(1,158)	(1,790)
Foreign currency exchange transaction income (loss)	694	398	(20)	(255)
Total other income (expenses)	133	(848)	(1,120)	(1,847)
Loss before income taxes	(2,163)	(6,740)	(11,491)	(14,330)
Income tax provision	(28)	23	(3)	14
Net loss	$ (2,135)	$ (6,763)	$ (11,488)	$ (14,344)
Net loss per share - basic and diluted (in dollars per share)	$ (0.03)	$ (0.11)	$ (0.17)	$ (0.23)
Weighted average common shares outstanding - basic and diluted (in shares)	68,187,128	63,333,737	67,885,622	63,092,874
Product
Revenue
Total revenue	$ 9,743	$ 19,337	$ 26,033	$ 39,806
Royalty and licensing
Revenue
Total revenue	$ 9,725	$ 256	$ 9,910	$ 431