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Schedule II - Valuation and Qualifying Accounts:

12 Months Ended

Dec. 31, 2015

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:

		2015			2014
Balance at beginning of year		$	230,000		$	217,000
Charged to expenses			55,000			67,000
Uncollectible accounts written off			(159,000)			(54,000)
Balance at end of year		$	126,000		$	230,000

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

		2015			2014
Balance at beginning of year		$	645,000		$	738,000
Charged to expenses			179,000			(92,000)
Obsolete inventory written off			(1,000)			(1,000)
Balance at end of year		$	823,000		$	645,000

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

		2015			2014
Cost Basis
Balance at beginning of year		$	38,818,011		$	38,400,335
Additions			207,239			817,636
Disposals			-			(399,960)
Balance at end of year		$	39,025,250		$	38,818,011
Accumulated depreciation
Balance at beginning of year		$	31,062,484		$	29,718,564
Depreciation			1,409,210			1,743,880
Disposals			-			(399,960)
Balance at end of year		$	32,471,694		$	31,062,484

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- Definition

The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 09
-Article 12

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- References

No definition available.

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