Accounts Receivable (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Accounts Receivable [Abstract]
Accounts receivable - net	$ 33,972,000	$ 29,530,000
Allowances for doubtful accounts	812,000	875,000
Government segment [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	11,546,000	8,134,000
Government segment [Member] | Billed [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	12,200,000	9,400,000
Government segment [Member] | Advance billings [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	(654,000)	(1,266,000)
Hospitality segment [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	$ 22,426,000	$ 21,396,000