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Organization and Summary of Significant Accounting Policies - Additional Information (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 USD ($) customer | Dec. 31, 2014 USD ($) customer | Dec. 31, 2013 USD ($) | Apr. 30, 2015 | Sep. 25, 2013 USD ($)
Accounting Policies [Line Items] |  |  |  |  |
Advertising Expense | $ 700,000 | $ 800,000 | $ 700,000 |  |
Depreciation and amortization | $ 12,800,000 | $ 11,300,000 | 10,900,000 |  |
Vendor-Specific Objective Evidence (VSOE) exist when (approximately 80% or more) standalone sales are within a reasonable price range | 80.00% |  |  |  |
Number of significant customers that accounted for more than 10% of accounts receivables | customer | 0 | 0 |  |  |
Transferred non-recourse accounts receivables | $ 38,600,000 | $ 62,000,000 | 41,300,000 |  |
Accounts receivables from third-party leasing companies for transferred non-recourse accounts receivables | 800,000 | 1,100,000 | 100,000 |  |
Cost of application development of enterprise-level software | 26,011,000 | 19,643,000 |  |  |
Capitalized software development costs | $ 92,837,000 | 87,677,000 |  |  |
Computer equipment and related software |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Useful life | 5 years |  |  |  |
Software development costs |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Cost of revenues for amortization of capitalized software development cost | $ 5,800,000 | 4,400,000 | 3,200,000 |  |
Minimum |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Vendor-Specific Objective Evidence, within a reasonably narrow price range (plus or minus of median rate) | 15.00% |  |  |  |
Estimated useful lives of assets | 1 year |  |  |  |
Minimum | Computer equipment and related software |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Useful life | 3 years |  |  |  |
Minimum | Furniture and Fixtures |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Useful life | 5 years |  |  |  |
Minimum | Equipment |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Useful life | 3 years |  |  |  |
Maximum |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Vendor-Specific Objective Evidence, within a reasonably narrow price range (plus or minus of median rate) | 15.00% |  |  |  |
Estimated useful lives of assets | 30 years |  |  |  |
Maximum | Computer equipment and related software |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Useful life | 5 years |  |  |  |
Maximum | Furniture and Fixtures |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Useful life | 7 years |  |  |  |
Maximum | Equipment |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Useful life | 12 years |  |  |  |
Selling, general and administrative |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Shipping and handling expenses | $ 8,500,000 | 7,400,000 | 6,100,000 |  |
Capitalized software costs included in property and equipment |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Cost of application development of enterprise-level software | 1,200,000 | 3,900,000 |  |  |
Capitalized software costs included in other assets | Software development costs |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Capitalized software development costs | 12,100,000 | 10,400,000 |  |  |
Revolving Credit Facility | Wells Fargo Bank, National Association | Line of Credit |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Revolving credit facility |  |  |  |  | $ 75,000,000
Foreign Exchange Forward |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Derivative, notional amount | 400,000 |  |  |  |
Primary Supplier |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Minimum supplier purchase obligations | $ 0 |  |  |  |
Notice of termination, time upon delivery | 2 months |  |  |  |
Payments to suppliers | $ 41,700,000 | $ 34,500,000 | $ 29,200,000 |  |
New Accounting Pronouncement, Early Adoption, Effect |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Net current deferred tax assets | $ 12,500,000 |  |  |  |
Credit Concentration Risk | Lease Receivable |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Percentage of lease receivable balance | 75.00% |  |  |  |
Avantec Heathcare Limited |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Percentage of interest acquired |  |  |  | 85.00% |

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