Identifiable Intangible Assets and Goodwill (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) segment	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Finite-Lived Intangible Assets [Line Items]
Capitalized software development costs	$ 1,000,000	$ 1,100,000	$ 3,100,000	$ 3,300,000
Amortization of capitalized software development costs	900,000	400,000	2,600,000	1,100,000
Amortization of intangible assets	241,000	241,000	724,000	724,000
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	22,926,000		22,926,000		$ 19,860,000
Less accumulated amortization	(10,759,000)		(10,759,000)		(8,190,000)
Total	12,167,000		12,167,000		11,670,000
Total intangible assets, net	12,567,000		$ 12,567,000		12,070,000
Number of operating segments | segment			2
Goodwill impairment			$ 0
Goodwill	11,051,000		11,051,000		11,051,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2018	1,107,000		1,107,000
2019	3,082,000		3,082,000
2020	2,640,000		2,640,000
2021	1,685,000		1,685,000
2022	692,000		692,000
Thereafter	2,961,000		2,961,000
Total	12,167,000		$ 12,167,000		11,670,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life			3 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life			7 years
Brink Acquisition
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	200,000	$ 200,000	$ 700,000	$ 700,000
Internal use software | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life			3 years
Internal use software | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life			7 years
Acquired and internally developed software costs
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	22,736,000		$ 22,736,000		19,670,000
Acquired and internally developed software costs | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life			3 years
Acquired and internally developed software costs | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life			7 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Useful life			7 years
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	160,000		$ 160,000		160,000
Non-competition agreements
Finite-Lived Intangible Assets [Line Items]
Useful life			1 year
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	30,000		$ 30,000		30,000
Restaurant/Retail
Finite-Lived Intangible Assets, Net [Abstract]
Goodwill	10,300,000		10,300,000		10,300,000
Government
Finite-Lived Intangible Assets, Net [Abstract]
Goodwill	800,000		800,000		800,000
Trademarks, trade names (non-amortizable)
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 400,000		$ 400,000		$ 400,000