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STATEMENTS OF INCOME (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Revenues:    
Recurring $ 6,515diri_RecurringRevenues $ 7,426diri_RecurringRevenues
Non-recurring 1,780diri_NonRecurring 1,555diri_NonRecurring
Total revenues 8,295us-gaap_SalesRevenueNet 8,981us-gaap_SalesRevenueNet
Operating costs and expenses:    
Operations, research and development 3,456us-gaap_OperatingExpenses 3,626us-gaap_OperatingExpenses
Sales and marketing 1,889us-gaap_SellingAndMarketingExpense 2,360us-gaap_SellingAndMarketingExpense
General and administrative 2,499us-gaap_GeneralAndAdministrativeExpense 2,451us-gaap_GeneralAndAdministrativeExpense
Amortization and depreciation 327us-gaap_DepreciationDepletionAndAmortization 394us-gaap_DepreciationDepletionAndAmortization
Total operating costs and expenses 8,171us-gaap_CostsAndExpenses 8,831us-gaap_CostsAndExpenses
Operating income 124us-gaap_OperatingIncomeLoss 150us-gaap_OperatingIncomeLoss
Other income (expense) (10)us-gaap_OtherNonoperatingIncome 18us-gaap_OtherNonoperatingIncome
Income before provision for income taxes 114us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 168us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Provision for income taxes 8us-gaap_IncomeTaxExpenseBenefit 4us-gaap_IncomeTaxExpenseBenefit
Net income $ 106us-gaap_NetIncomeLoss $ 164us-gaap_NetIncomeLoss
Basic income per share attributable to common stockholders (in dollars per share) $ 0.01us-gaap_EarningsPerShareBasic $ 0.01us-gaap_EarningsPerShareBasic
Diluted income per share attributable to common stockholders (in dollars per share) $ 0.01us-gaap_EarningsPerShareDiluted $ 0.01us-gaap_EarningsPerShareDiluted
Basic weighted average common shares outstanding (in shares) 12,649us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 12,519us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted weighted average common shares outstanding (in shares) 12,670us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 12,635us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding