Condensed Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenues	$ 9,193	$ 3,942	$ 18,528	$ 16,281
Operating expenses
Direct costs and expenses	3,891	1,503	7,346	4,244
Research and development	2,706	2,359	7,713	7,966
Sales, marketing, general and administrative	7,879	8,212	22,793	24,080
Accretion of contingent consideration	957	896	2,901	2,525
Change in fair value of contingent consideration			(1,944)	663
Total operating expenses	15,433	12,970	38,809	39,478
Loss from operations	(6,240)	(9,028)	(20,281)	(23,197)
Interest expense	(2,658)	(706)	(6,899)	(2,005)
Other income, net	53	133	363	1,001
Net loss	$ (8,845)	$ (9,601)	$ (26,817)	$ (24,201)
Net loss per share, basic and diluted	$ (31.93)	$ (39.35)	$ (99.69)	$ (103.87)
Weighted-average shares outstanding, basic and diluted	277	244	269	233