Accounts Receivable, net (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts Receivable [Abstract]
Accounts receivable-net	$ 29,530,000	$ 29,674,000
Write-offs of accounts receivable	382,000	278,000
Provision for doubtful accounts	772,000	340,000
Government segment [Member]
Accounts Receivable [Abstract]
Accounts receivable-net	8,134,000	8,890,000
Government segment [Member] | Billed [Member]
Accounts Receivable [Abstract]
Accounts receivable-net	9,400,000	9,340,000
Government segment [Member] | Advance billings [Member]
Accounts Receivable [Abstract]
Accounts receivable-net	(1,266,000)	(450,000)
Hospitality segment [Member]
Accounts Receivable [Abstract]
Accounts receivable-net	21,396,000	20,784,000
Allowances for doubtful accounts	$ 875,000	$ 484,000	$ 422,000