Schedule II - Valuation and Qualifying Accounts:

12 Months Ended

Dec. 31, 2013

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:

	2013		2012
Balance at beginning of year	$	99,000	$	67,000
Charged to expenses		138,000		30,000
Uncollectible accounts written off		(20,000)		2,000
Balance at end of year	$	217,000	$	99,000

The following is a summary of the allowance for excess inventory for the years ended December 31:

	2013		2012
Balance at beginning of year	$	636,000	$	384,000
Charged to expenses		101,000		252,000
Obsolete inventory written off		1,000		-
Balance at end of year	$	738,000	$	636,000

The following is a summary of property and equipment and the related accounts of accumulated depreciation for the years ended December 31:

	2013		2012
Cost Basis
Balance at beginning of year	$	36,571,114	$	34,341,820
Additions		1,829,221		2,229,294
Disposals		-		-
Balance at end of year	$	38,400,335	$	36,571,114
Accumulated depreciation
Balance at beginning of year	$	27,872,044	$	26,071,629
Depreciation		1,846,520		1,800,415
Disposals		-		-
Balance at end of year	$	29,718,564	$	27,872,044