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Income Taxes - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |  |  |
Federal statutory rate | 35.00% | 35.00% | 35.00%
Increase in valuation allowance | $ 1,805,000 | $ 378,000 | $ 240,000
U.S federal net operating loss carryforwards | $ 76,400,000 | 32,700,000 |
Period to utilize the net operating loss carryforwards | 19 years |  |
NOL carryforward used in period | $ 6,200,000 | 6,000,000 |
Foreign operating loss carryforwards | 3,000,000 | 0 |
Unrecognized tax benefts including interest and penalties | 2,800,000 | 2,200,000 |
Unrecognized tax benefits that would impact effective rate | 2,800,000 | 2,200,000 |
Reduction in valuation allowance | 2,300,000 | 1,401,000 |
Accrued interest and penalties | 216,000 | 187,000 |
Income tax penalties and interest expense | 30,000 | $ 6,000 | $ 42,000
Maximum |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |  |  |
Estimated change in unrecognized tax benefit in next twelve months, lower bound | $ 500,000 |  |

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- Definition The gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the balance sheet date including Interest and Penalties. + References No definition available. + Details
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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 + Details
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