Nature of Operations and Summary of Significant Accounting Policies - Narrative (Details)
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12 Months Ended |
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Dec. 31, 2016
USD ($)
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Dec. 31, 2015
USD ($)
installment
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Dec. 31, 2014
USD ($)
shares
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Jun. 30, 2015
USD ($)
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Dec. 31, 2013
USD ($)
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Oct. 19, 2007
shares
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| Property, Plant and Equipment [Line Items] |
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| Cash |
$ 52,453,000
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$ 47,431,000
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| Cash equivalents |
73,468,000
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57,483,000
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| Cash and cash equivalents |
125,921,000
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104,914,000
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$ 44,816,000
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$ 14,550,000
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| Restricted cash |
2,900,000
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$ 20,000,000
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| Inventory valuation reserves |
82,000
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29,000
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| Deferred tax liability recorded against undistributed foreign earnings |
3,650,000
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2,789,000
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| Loss on foreign exchange |
$ (333,000)
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$ (204,000)
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$ (202,000)
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| Number of securities called by warrants | shares |
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88,097
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3,141,499
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| Long-Term Incentive Plan, Payment Commencing in February of the Calendar Year Immediately Following the Conclusion of the Performance Period |
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| Property, Plant and Equipment [Line Items] |
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| Long-term incentive plan, percentage of award payable in cash |
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50.00%
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| Long-term incentive plan, number of installments | installment |
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35
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| Long-Term Incentive Plan, Payment Commencing in February 2021 and Ending in December 2023 |
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| Property, Plant and Equipment [Line Items] |
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| Long-term incentive plan, percentage of award payable in cash |
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50.00%
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| Long-term incentive plan, number of installments | installment |
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35
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| Software and Software Development Costs [Member] | Minimum |
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| Property, Plant and Equipment [Line Items] |
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| Property, and equipment useful life |
3 years
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| Software and Software Development Costs [Member] | Maximum |
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| Property, Plant and Equipment [Line Items] |
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| Property, and equipment useful life |
5 years
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| Furniture and Fixtures | Minimum |
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| Property, Plant and Equipment [Line Items] |
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| Property, and equipment useful life |
5 years
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| Furniture and Fixtures | Maximum |
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| Property, Plant and Equipment [Line Items] |
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| Property, and equipment useful life |
7 years
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| China |
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| Property, Plant and Equipment [Line Items] |
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| Cash and cash equivalents |
$ 6,800,000
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