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Long-Term Debt
6 Months Ended
Jun. 30, 2018
Debt Disclosure [Abstract]  
Long-term Debt [Text Block]
Note 3.
Long-Term Debt
 
Long-term debt consists of seven notes with three financing companies collateralized by the Gamma Knife equipment, the individual customer contracts, and related accounts receivable at June 30, 2018. As of June 30, 2018, long-term debt on the Condensed Consolidated Balance Sheets was $
4,787,000
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.