Segment and Related Information - Reconciliation of Segment Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Identifiable assets by geographic area [Abstract]
Long-Lived Assets	$ 13,503	$ 14,352
Goodwill by business segment [Abstract]
Goodwill	41,214	41,386
United States
Identifiable assets by geographic area [Abstract]
Long-Lived Assets	13,424	14,260
Other Countries
Identifiable assets by geographic area [Abstract]
Long-Lived Assets	79	92
Restaurant/Retail
Goodwill by business segment [Abstract]
Goodwill	40,478	40,650
Government
Goodwill by business segment [Abstract]
Goodwill	736	736
Operating segments | Restaurant/Retail
Identifiable assets by geographic area [Abstract]
Long-Lived Assets	1,776	1,987
Operating segments | Government
Identifiable assets by geographic area [Abstract]
Long-Lived Assets	241	272
Other
Identifiable assets by geographic area [Abstract]
Long-Lived Assets	$ 11,486	$ 12,093