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Accrued liabilities - Note 5
12 Months Ended
Dec. 31, 2014
Notes to Financial Statements  
Accrued liabilities - Note 5

5. Accrued liabilities

Accrued liabilities consist of the following:

            December 31,
            2014     2013
Bonuses         $ 889,000    $ 725,000 
Payroll and payroll taxes           322,000      375,000 
Compensated absences           336,000      315,000 
Deferred rent credit           134,000      99,000 
Warranty           35,000      32,000 
Adverse purchase commitments           500,000      500,000 
Professional fees           78,000      76,000 
Other           435,000      348,000 
          $ 2,729,000    $ 2,470,000