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Schedule II - Valuation and Qualifying Accounts: | 12 Months Ended
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Dec. 31, 2014
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:
|  | 2014 |  | 2013 |
Balance at beginning of year |  | $ | 217,000 |  | $ | 99,000 |
Charged to expenses |  |  | 67,000 |  |  | 138,000 |
Uncollectible accounts written off |  |  | (54,000) |  |  | (20,000) |
Balance at end of year |  | $ | 230,000 |  | $ | 217,000 |
The following is a summary of the allowance for excess inventory for the years ended December 31:
|  | 2014 |  | 2013 |
Balance at beginning of year |  | $ | 738,000 |  | $ | 636,000 |
Charged to expenses |  |  | (92,000) |  |  | 101,000 |
Obsolete inventory written off |  |  | (1,000) |  |  | 1,000 |
Balance at end of year |  | $ | 645,000 |  | $ | 738,000 |
The following is a summary of property and equipment and the related accounts of accumulated depreciation for the years ended December 31:
|  | 2014 |  | 2013 |
Cost Basis |  |  |  |  |  |  |
Balance at beginning of year |  | $ | 38,400,335 |  | $ | 36,571,114 |
Additions |  |  | 817,636 |  |  | 1,829,221 |
Disposals |  |  | (399,960) |  |  | - |
Balance at end of year |  | $ | 38,818,011 |  | $ | 38,400,335 |
Accumulated depreciation |  |  |  |  |  |  |
Balance at beginning of year |  | $ | 29,718,564 |  | $ | 27,872,044 |
Depreciation |  |  | 1,743,880 |  |  | 1,847,520 |
Disposals |  |  | (399,960) |  |  | - |
Balance at end of year |  | $ | 31,062,484 |  | $ | 29,718,564 |

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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 + Details
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