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Schedule II - Valuation and Qualifying Accounts:
 12 Months Ended
Dec. 31, 2016
Valuation and Qualifying Accounts [Abstract]  
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Schedule II – Valuation and Qualifying Accounts:
 
The following is a summary of the allowance for doubtful accounts related to accounts receivable for the years ended December 31:
 
 
 
2016
 
2015
 
Balance at beginning of year
 
$
126,000
 
$
230,000
 
Charged to expenses
 
 
26,000
 
 
55,000
 
Uncollectible accounts written off
 
 
(15,000)
 
 
(159,000)
 
Balance at end of year
 
$
137,000
 
$
126,000
 
 
The following is a summary of the allowance for excess inventory for the years ended December 31:
 
 
 
2016
 
2015
 
Balance at beginning of year
 
$
823,000
 
$
645,000
 
Charged to expenses
 
 
(11,000)
 
 
179,000
 
Obsolete inventory written off
 
 
(18,000)
 
 
(1,000)
 
Balance at end of year
 
$
794,000
 
$
823,000
 
 
The following is a summary of property and equipment and the related accounts of accumulated depreciation for the years ended December 31:
 
 
 
2016
 
2015
 
Cost Basis
 
 
 
 
 
 
 
Balance at beginning of year
 
$
39,025,000
 
$
38,818,000
 
Additions
 
 
-
 
 
207,000
 
Disposals
 
 
(775,000)
 
 
-
 
Balance at end of year
 
$
38,250,000
 
$
39,025,000
 
 
 
 
 
 
 
 
 
Accumulated depreciation
 
 
 
 
 
 
 
Balance at beginning of year
 
$
32,472,000
 
$
31,063,000
 
Depreciation
 
 
466,000
 
 
1,409,000
 
Disposals
 
 
-
 
 
-
 
Balance at end of year
 
$
32,938,000
 
$
32,472,000