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Accrued Liabilities (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Accrued Liabilities    
Point loyalty program $ 1,652,000 $ 1,660,000
Payroll and related items 2,351,000 2,179,000
Win due to Delaware State Lottery Office 3,583,000 2,564,000
Other 2,146,000 2,135,000
Accrued liabilities $ 9,732,000 $ 8,538,000