Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

v3.8.0.1
Income Taxes - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Contingency [Line Items]      
Valuation allowance $ 7,534,000 $ 7,344,000  
Interest rate swaps 401,000 859,000  
Net operating losses 10,099,000 8,044,000  
Unrecognized tax benefits 600,000 600,000 $ 2,200,000
Unrecognized tax benefits that would impact effective tax rate 80,000 20,000  
Operating loss carryforward 22,716,000 14,449,000  
Earnings with no repatriation tax 0    
Amount of (decrease) increase included in tax expense for interest and penalties related to uncertain tax positions (60,000) (20,000) (200,000)
Tax Cuts and Jobs Act of 2017, incomplete accounting, change in tax rate, deferred tax liability, provisional income tax benefit 13,900,000    
Income tax benefit 4,791,000 (4,370,000) $ (4,976,000)
Foreign Tax Authority      
Income Tax Contingency [Line Items]      
Deferred tax assets, foreign 6,871,000 6,269,000  
Operating loss carryforward 27,200,000    
State      
Income Tax Contingency [Line Items]      
Net operating losses 262,000 $ 216,000  
Operating loss carryforward 15,700,000    
Federal      
Income Tax Contingency [Line Items]      
Operating loss carryforward $ 21,200,000