Accounts Receivable (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Accounts Receivable [Abstract]
Accounts receivable-net	$ 29,965,000	$ 29,890,000
Allowances for doubtful accounts	477,000	541,000
Government segment [Member]
Accounts Receivable [Abstract]
Accounts receivable-net	8,431,000	7,665,000
Government segment [Member] | Billed [Member]
Accounts Receivable [Abstract]
Accounts receivable-net	10,480,000	11,226,000
Government segment [Member] | Advance billings [Member]
Accounts Receivable [Abstract]
Accounts receivable-net	(2,049,000)	(3,561,000)
Hospitality segment [Member]
Accounts Receivable [Abstract]
Accounts receivable-net	$ 21,534,000	$ 22,225,000