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Income Taxes (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Oct. 31, 2016
Sep. 30, 2015
Jan. 31, 2012
Oct. 31, 2010
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2025
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Line Items]                      
Unrecognized Tax Benefits         $ 834,000   $ 834,000       $ 911,000
Income Tax Examination, Penalties and Interest Accrued         400,000   400,000       $ 400,000
Tax Adjustments, Settlements, and Unusual Provisions     $ 332,000 $ 317,000              
Income Tax Expense (Benefit)         $ 469,000 $ 268,000 $ 1,502,000 $ 807,000      
Subsidiary Revenue   $ 65,000,000                  
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                     $ 25,800,000
IncomeTaxReconciliationRepatriationOfForeignEarnings                     $ 9,100,000
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