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Debt - Promissory Note/FCC Civil Penalty (Details) $ in Thousands | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Jun. 30, 2015 USD ($) payment | Jul. 31, 2013 USD ($) installment | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Total debt, net carrying value |  |  | $ 32,930 | $ 33,654 |
Debt, gross |  |  | 32,927 |  |
Discount on debt |  |  | 7 | 79 |
FCC Enforcement Bureau Civil Penalty |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Accrued civil penalty liability |  |  |  |  | $ 2,000
Notes Payable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt, net carrying value |  |  | 326 | 1,041 |
Debt, gross |  |  | 333 | 1,120 |
Notes Payable | Promissory Note |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Promissory note, stated interest rate |  | 12.75% |  |  |
Promissory note, number of monthly payments | installment |  | 42 |  |  |
Total debt, net carrying value |  |  |  | 100 |
Debt, gross |  | $ 4,100 | 0 | 120 |
Notes Payable | FCC Enforcement Bureau Civil Penalty |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt, net carrying value | $ 1,700 |  | 300 | 900 |
Debt, gross | $ 2,000 |  | $ 333 | $ 1,000 |
Number of quarterly payments | payment | 12 |  |  |  |
Imputed interest rate | 12.75% |  |  |  |
Discount on debt | $ 300 |  |  |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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