Accounts Receivable (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Accounts Receivable [Abstract]
Accounts receivable - net	$ 32,383,000	$ 31,445,000
Allowances for doubtful accounts	711,000	582,000
Government segment [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	10,495,000	8,890,000
Government segment [Member] | Billed [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	11,265,000	9,340,000
Government segment [Member] | Advance billings [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	(770,000)	(450,000)
Hospitality segment [Member]
Accounts Receivable [Abstract]
Accounts receivable - net	$ 21,888,000	$ 22,555,000