Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Total revenue	$ 40,030	$ 41,456	$ 109,857	$ 109,523
Operating expenses:
Sales and marketing	7,372	8,796	22,498	23,644
Product development	4,973	5,558	15,652	15,362
General and administrative	8,072	7,615	24,724	22,584
Amortization of intangible assets	807	1,133	2,619	3,115
Total operating expenses	44,552	47,533	131,542	127,785
Loss from operations	(4,522)	(6,077)	(21,685)	(18,262)
Interest income	44	116	232	164
Interest expense	(5)	(2)	(15)	(4)
Other income (expense), net	(6)	(59)	6	(92)
Loss before income taxes	(4,489)	(6,022)	(21,462)	(18,194)
Income tax benefit (expense)	4	(13)	(71)	(59)
Net loss	$ (4,485)	$ (6,035)	$ (21,533)	$ (18,253)
Net loss per share - basic and diluted (in dollars per share)	$ (0.17)	$ (0.24)	$ (0.83)	$ (0.75)
Weighted average number of shares - basic and diluted (in shares)	26,089	25,111	25,868	24,315
Product
Revenue:
Total revenue	$ 19,611	$ 22,482	$ 53,021	$ 58,125
Operating expenses:
Product and service costs (exclusive of amortization of intangible assets shown separately below)	14,221	16,202	40,049	42,003
Service
Revenue:
Total revenue	20,419	18,974	56,836	51,398
Operating expenses:
Product and service costs (exclusive of amortization of intangible assets shown separately below)	$ 9,107	$ 8,229	$ 26,000	$ 21,077