| Balance Sheet Detail | 
 
		
			5.  Balance Sheet Detail
		 
		
			 
		 
		
			Equipment and leasehold improvements, net consist of the following:
		 
		
			 
		 
		
			
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						December 31,  
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						December 31,  
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				| 
					 
						  
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				 | 
				
					 
						2019 
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				 | 
				
					 
						2018 
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				 | 
			 
			
				| 
					 
						Equipment 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
					 
						 2,230 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
					 
						 2,146 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Leasehold improvements 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						 1,289 
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				 | 
				
					 
						  
				 | 
				
					 
						 1,332 
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				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
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						 3,519 
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				 | 
				
					 
						  
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						 3,478 
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				| 
					 
						Less accumulated depreciation and amortization 
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						 (2,304) 
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				 | 
				
					 
						  
				 | 
				
					 
						 (1,890) 
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						$ 
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						 1,215 
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						$ 
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						 1,588 
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				 | 
			 
		  
		
			Depreciation expense relating to equipment and leasehold improvements, net was $0.5 million during the years ended December 31, 2019 and 2018, respectively.
		 
		
			 
		 
		
			Accounts receivable – long term, net consist of the following:
		 
		
			 
		 
		
			
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				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						December 31,  
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				 | 
				
					 
						December 31,  
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				 | 
			 
			
				| 
					 
						  
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				 | 
				
					 
						2019 
				 | 
				
					 
						     
				 | 
				
					 
						2018 
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				 | 
			 
			
				| 
					 
						Total amount due from customer 
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				 | 
				
					 
						$ 
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						 5,656 
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						$ 
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						 11,169 
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				| 
					 
						Less: unamortized discount 
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				 | 
				
					 
						  
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						 (194) 
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				 | 
				
					 
						  
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						 (391) 
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				| 
					 
						Less: current portion included in accounts receivable 
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				 | 
				
					 
						  
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						 (4,104) 
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				 | 
				
					 
						  
				 | 
				
					 
						 (7,622) 
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				| 
					 
						  
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				 | 
				
					 
						$ 
				 | 
				
					 
						 1,358 
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				 | 
				
					 
						$ 
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						 3,156 
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				 | 
			 
		  
		
			 
		 
		
			Accounts payable and accrued expenses consist of the following:
		 
		
			
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				| 
					 
						  
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						December 31,  
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				 | 
				
					 
						December 31,  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						     
				 | 
				
					 
						2019 
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				 | 
				
					 
						2018 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Trade accounts payable 
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				 | 
				
					 
						$ 
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						 73,310 
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						$ 
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						 62,751 
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				 | 
			 
			
				| 
					 
						Accrued expenses 
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				 | 
				
					 
						  
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						 5,054 
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				 | 
				
					 
						  
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						 3,902 
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						$ 
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						 78,364 
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						$ 
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						 66,653 
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				 | 
			 
		  
		
			 
		 
		
			Accumulated other comprehensive loss consists of the following:
		 
		
			
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				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						December 31,  
				 | 
				
					 
						  
				 | 
				
					 
						December 31,  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						     
				 | 
				
					 
						2019 
				 | 
				
					 
						     
				 | 
				
					 
						2018 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Foreign currency translation adjustments 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
					 
						 (1,130) 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
					 
						 (1,419) 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
					 
						 (1,130) 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
					 
						 (1,419) 
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				 | 
			 
		  
		
			 
		 
   
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