Accounts Receivable, net (Details) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Accounts Receivable [Abstract]
Accounts receivable - net	$ 29,344,000	$ 29,674,000
Allowances for doubtful accounts	609,000	484,000
Government segment [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	9,580,000	8,890,000
Government segment [Member] | Billed [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	10,179,000	9,340,000
Government segment [Member] | Advance billings [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	(599,000)	(450,000)
Hospitality segment [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	$ 19,764,000	$ 20,784,000