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Number of installments Share-Based Compensation Arrangement by Share-Based Payment Award, Vesting, Number of Installments Share-Based Compensation Arrangement by Share-Based Payment Award, Vesting, Number of Installments Assets Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Present value of net minimum lease payments Operating Lease, Liability Executive Officer 2 Executive Officer 2 [Member] Represents executive officer 2. Insider Trading Policies and Procedures [Line Items] Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Employee stock purchase plan (in shares) Incremental Common Shares Attributable to Dilutive Effect of Equity Unit Purchase Agreements Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Scanner Appliances and Other Computer Equipment Not Placed in Service Scanner Appliances and Other Computer Equipment Not Placed In Service [Member] Represents scanner appliances and other computer equipment not placed in service. 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