Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 18, 2019	Sep. 30, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 41,386			$ 11,051
3M's Drive-Thru Communications Systems
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill			$ 2,390
Property, plant and equipment – net			712
Total assets			8,412
Warranty liability			1,412
Cash consideration			7,000
3M's Drive-Thru Communications Systems | Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets			510
3M's Drive-Thru Communications Systems | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets			1,200
3M's Drive-Thru Communications Systems | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets			$ 3,600
Restaurant Magic
Acquired Finite-Lived Intangible Assets [Line Items]
Tangible assets		$ 1,344
Goodwill		27,945
Total assets		47,689
Accounts payable and accrued expenses		629
Deferred revenue		715
Earn out liability		3,340
Cash consideration		43,005
Restaurant Magic | Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets		16,400
Restaurant Magic | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets		1,100
Restaurant Magic | Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets		$ 900