XML 65 R55.htm IDEA: XBRL DOCUMENT v3.19.1
Debt and Credit Facilities (Details Textual)
1 Months Ended 3 Months Ended 24 Months Ended
Oct. 11, 2017
USD ($)
$ / shares
Mar. 31, 2019
USD ($)
Sep. 15, 2022
D
Dec. 31, 2018
USD ($)
May 08, 2018
USD ($)
Sep. 25, 2017
USD ($)
$ / shares
Convertible Senior Notes due 2022            
Debt Instrument [Line Items]            
Convertible Senior Notes due 2022, aggregate pricncipal $ 6,000,000 $ 46,000,000   $ 46,000,000   $ 40,000,000
Interest rate   5.50%       5.50%
Proceeds received $ 43,000,000          
Conversion rate   157.5101        
Conversion price | $ / shares           $ 6.35
Conversion premium, percent 29.00%         27.00%
Share Price | $ / shares $ 4.94         $ 5.00
Initial purchaser's discount   $ 2,500,000        
Initial purchaser's discount, percent   5.50%        
Discount rate   12.00%        
Amount over estimated fair value of the liability component   $ 8,500,000        
Transaction costs   500,000        
Transaction costs allocated to equity   $ 100,000        
Effective interest rate   12.20%        
Revolving Credit Facility | East West Bank            
Debt Instrument [Line Items]            
Amount available under revolving line of credit   $ 5,800,000        
Annual commitment fee amount   125,000        
Borrowings under revolving line of credit   $ 0        
Revolving Credit Facility | East West Bank | Minimum            
Debt Instrument [Line Items]            
Unused commitment fee percentage   0.30%        
Revolving Credit Facility | East West Bank | Maximum            
Debt Instrument [Line Items]            
Unused commitment fee percentage   0.50%        
Revolving Credit Facility | East West Bank | Prime Rate | Minimum            
Debt Instrument [Line Items]            
Credit facility interest on borrowings, percentage added to rate   0.00%        
Revolving Credit Facility | East West Bank | Prime Rate | Maximum            
Debt Instrument [Line Items]            
Credit facility interest on borrowings, percentage added to rate   0.50%        
Revolving Credit Facility | East West Bank | LIBOR | Minimum            
Debt Instrument [Line Items]            
Credit facility interest on borrowings, percentage added to rate   2.75%        
Revolving Credit Facility | East West Bank | LIBOR | Maximum            
Debt Instrument [Line Items]            
Credit facility interest on borrowings, percentage added to rate   3.25%        
Revolving Credit Facility | Revolving Line of Credit, Option a | East West Bank            
Debt Instrument [Line Items]            
Revolving line of credit         $ 15,000,000  
Scenario, Forecast | Convertible Senior Notes due 2022            
Debt Instrument [Line Items]            
Convertible price threshold percentage     130.00%      
Convertible threshold trading days | D     20      
Korean Subsidiary | Revolving Credit Facility | East West Bank            
Debt Instrument [Line Items]            
Percentage of equity interests pledged   65.00%