Accounts Receivable, net (Details) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Accounts Receivable [Abstract]
Accounts receivable - net	$ 34,467,000	$ 31,445,000
Allowances for doubtful accounts	553,000	582,000
Government segment [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	8,533,000	8,890,000
Government segment [Member] | Billed [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	10,018,000	9,340,000
Government segment [Member] | Advance billings [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	(1,485,000)	(450,000)
Hospitality segment [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	$ 25,934,000	$ 22,555,000