Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) segment	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of reportable segments for goodwill purposes | segment	1
Property, Plant and Equipment [Abstract]
Impairment of goodwill	$ 0	$ 0	$ 0
Impairment of long-lived assets	0	0	0
Write off of deferred financing costs	$ 100,000	200,000	400,000
Revenue Recognition [Abstract]
Maintenance agreements revenue recognition period (in years)	1 year
Advertising expenses	$ 59,000	347,000	283,000
Tax liability accrued in anticipation of future dividends from foreign subsidiaries	0
Foreign currency transaction losses	$ 271,000	515,000	2,000
Minimum [Member]
Revenue Recognition [Abstract]
Subscription and support revenue recognition period (in years)	1 year
Hosting services arrangement period (in years)	1 year
Maximum [Member]
Revenue Recognition [Abstract]
Subscription and support revenue recognition period (in years)	3 years
Hosting services arrangement period (in years)	3 years
Trade Names [Member]
Property, Plant and Equipment [Abstract]
Impairment of intangible asset	$ 0	$ 0	$ 0
Computer Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful life (in years)	3 years
Computer Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful life (in years)	5 years
Purchased Software and Licenses [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful life (in years)	3 years
Purchased Software and Licenses [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful life (in years)	5 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Abstract]
Estimated useful life (in years)	7 years