CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net revenue	$ 20,744	$ 15,820	$ 53,600	$ 42,991
Cost of revenue	4,849	3,843	13,431	10,825
Gross profit	15,895	11,977	40,169	32,166
Operating expenses:
Sales and marketing	8,771	7,150	22,924	20,005
General and administrative	7,267	4,877	19,448	16,393
Research and development	1,396	1,122	3,843	3,455
Total operating expenses	17,434	13,149	46,215	39,853
Operating loss	(1,539)	(1,172)	(6,046)	(7,687)
Other expenses:
Interest expense, net	1,297	608	2,232	1,722
Other expense	41	85	78	148
Total other expenses	1,338	693	2,310	1,870
Net loss from continuing operations	(2,877)	(1,865)	(8,356)	(9,557)
Net gain from discontinued operations	213	0	54	0
Net loss	(2,664)	(1,865)	(8,302)	(9,557)
Net loss attributable to common stockholders	$ (2,664)	$ (1,865)	$ (8,302)	$ (9,557)
Weighted average common stock - basic and diluted (in shares)	14,639,020	12,624,858	14,487,015	12,417,972
Net loss per share attributable to common stockholders - basic and diluted (in dollars per share)	$ (0.18)	$ (0.15)	$ (0.57)	$ (0.77)