Divestiture and Discontinued Operations (Details) - USD ($) $ in Thousands		12 Months Ended
	Nov. 04, 2015	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration received		$ 0	$ 12,100
Liabilities
Liabilities of discontinued operation		0	441
Summary of Results of Discontinued Operations [Abstract]
Benefit from income taxes		400	3,200
Loss from discontinued operations, net of taxes		(720)	(4,912)
Working capital adjustment paid		977	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
Estimated fair value of the notes receivable	3,500
Decrease in receivables based on net tangible asset		(900)
Consideration could be received upon achievement of targets	$ 1,500
Assets
Other current assets		462	377
Assets of discontinued operation		462	377
Liabilities
Accrued salaries and benefits		0	441
Liabilities of discontinued operation		0	441
Summary of Results of Discontinued Operations [Abstract]
Total revenues		0	14,545
Loss from discontinued operations before income taxes		(1,131)	(5,702)
Loss on disposition		0	(2,408)
Benefit from income taxes		411	3,198
Loss from discontinued operations, net of taxes		(720)	(4,912)
Decrease in note receivables, net of tax		(600)
Loss on foreign currency exposure, net of tax		(100)
Working capital adjustment paid		$ (977)
Working capital adjustment - accrued expenses			900
Loss from discontinued operations - working capital adjustment, net of taxes			$ (26)