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Accrued Compensation (Tables)
 12 Months Ended
Dec. 31, 2017
Compensation Related Costs [Abstract]  
Schedule of Accrued Compensation

Accrued compensation consisted of the following at December 31, 2017 and 2016:

 

    December 31,  
    2017     2016  
Accrued vacation   $ 290,000     $ 291,000  
Accrued salaries     278,000       264,000  
Accrued bonuses     61,000       487,000  
Accrued commissions     17,000       18,000  
Total accrued compensation   $ 646,000     $ 1,060,000