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Income Taxes (Details Textual) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 31, 2016 | Sep. 30, 2015 | Jan. 31, 2012 | Oct. 31, 2010 | Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2026 | Dec. 31, 2018 | Dec. 31, 2017
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |
Unrecognized Tax Benefits |  |  |  |  | $ 906,000 |  |  |  | $ 911,000
Income Tax Examination, Penalties and Interest Accrued |  |  |  |  | 400,000 |  |  |  | $ 400,000
Tax Adjustments, Settlements, and Unusual Provisions |  |  | $ 369,000 | $ 353,000 |  |  |  |  |
Income Tax Expense (Benefit) |  |  |  |  | $ 582,000 | $ 445,000 |  |  |
Subsidiary Revenue |  | $ 72,400,000 |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  |  |  |  |  |  | 35.00%
Reversal of Service Tax Refund | $ 160,000 |  |  |  |  |  |  |  |
Service Tax Credit Receivable | $ 1,000,000 |  |  |  |  |  |  |  |
Maximum cumulative exposure for unrepatriated foreign earnings |  |  |  |  |  |  |  |  | $ 24,800,000
Global Intangible Low-Taxed Income [Member] |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  |  | 10.50% |  |  |  |
Scenario, Plan [Member] |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  |  |  |  |  | 21.00% |
Scenario, Plan [Member] | Global Intangible Low-Taxed Income [Member] |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  |  |  |  | 13.125% |  |
Maximum [Member] |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |
Percentage for Subsidiary Service Tax |  | 15.00% |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |
Percentage for Subsidiary Service Tax |  | 12.36% |  |  |  |  |  |  |
Philippine Bureau Of Taxation [Member] |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |
Income Tax Expense (Benefit) |  |  |  |  | $ 184,000 |  |  |  |

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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