Divestiture and Discontinued Operations (Details) - USD ($) $ in Thousands		3 Months Ended
	Nov. 04, 2015	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Summary of Results of Discontinued Operations [Abstract]
Income from discontinued operations, net of taxes		$ 183	$ 0
PAR Springer Miller Systems Inc [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total consideration	$ 16,600
Consideration received	12,100
Consideration receivable	$ 4,500
Consideration receivable period from closing date	18 months
Estimated fair value of the notes receivable		3,800
Increase in receivables based on net tangible asset		284,000
Consideration payable upon achievement of targets	$ 1,500
Assets [Abstract]
Other current assets		462		$ 462
Assets of discontinued operation		462		462
Liabilities [Abstract]
Accrued salaries and benefits		0		0
Liabilities of discontinued operation		0		$ 0
Summary of Results of Discontinued Operations [Abstract]
Total revenues		0	0
Income from discontinued operations before income taxes		284	0
Income taxes		(101)	0
Income from discontinued operations, net of taxes		$ 183	$ 0