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ACCOUNTING POLICIES (Details Textual) (USD $) | 12 Months Ended
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Dec. 31, 2013 Customers | Dec. 31, 2012 Customers | Dec. 31, 2011
Accounting Policies [Line Items] |  |  |
Line of Credit Facility, Maximum Amount Outstanding During Period | $ 9,000,000 |  |
Number Of Customers | 19 | 19 |
Interest Costs Capitalized | 390,000 | 196,000 |
Property Subject to or Available for Operating Lease, Net, Total | 79,828,000 | 80,884,000 |
Property Subject to or Available for Operating Lease, Accumulated Depreciation | 44,630,000 | 38,515,000 |
Cost Method Investments | 2,701,000 | 2,687,000 |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 576,000 | 588,000 | 570,000
Foreign Currency Transaction Gain, before Tax | 1,174,000 | 132,000 | 27,000
Certificates of Deposit [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Line of Credit Facility, Maximum Amount Outstanding During Period | $ 9,000,000 | $ 9,000,000 |
Investment Interest Rate | 10.00% | 45.00% |
Investment Maturity Date | Aug. 31, 2014 | Aug. 31, 2013 |
Mevion Medical Systems Inc [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Cost Method Investment Interest Percentage | 0.77% | 1.00% |
Maximum [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Estimated Useful Lives | 15 years |  |
Stock Options Exercise Price | $ 6.50 | $ 6.50 | $ 6.50
Minimum [Member] |  |  |
Accounting Policies [Line Items] |  |  |
Property, Plant and Equipment, Estimated Useful Lives | 3 years |  |
Stock Options Exercise Price | $ 2.30 | $ 2.76 | $ 2.76

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- Definition The interest rate for investments that have an interest rate. For fixed rate investments, this indicates the fixed interest rate. If the investment has a variable interest rate, the rate stated here may be the rate that is currently relevant. In this case the "Investment, Interest Rate is Current Rate for Variable Rate Investment Flag", "Investment, Interest Rate is Discount Rate at Purchase Flag", "Investment, Interest Rate Reflects Current Yield Flag" should be used. If one of these flags are not appropriate to explain the interest rate that is indicated, then a new flag should be added or an explanation should be included in "Investment, Additional Information". + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 12 -Sentence Column A + Details
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 + Details
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- Definition Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=29638308&loc=d3e40346-111594 + Details
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- Definition Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2155824 + Details
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