Annual report pursuant to Section 13 and 15(d)

Note 2 - Summary of Significant Accounting Policies (Details Textual)

v3.6.0.2
Note 2 - Summary of Significant Accounting Policies (Details Textual)
3 Months Ended 12 Months Ended
Apr. 15, 2016
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Number of Financial Institutions     1  
Allowance for Doubtful Accounts Receivable     $ 0 $ 0
Inventory, Raw Materials, Net of Reserves     181,000  
Inventory, Finished Goods, Net of Reserves     $ 2,506,000  
Warranty Period     1 year  
Minimum [Member]        
Property, Plant and Equipment Estimated Useful Lives1     3 years  
Maximum [Member]        
Property, Plant and Equipment Estimated Useful Lives1     7 years  
Medical Equipment, Sales Demos [Member]        
Property, Plant and Equipment Estimated Useful Lives1     5 years  
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]        
Concentration Risk, Number of Customers     3 4
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Three Customers [Member]        
Concentration Risk, Percentage     78.00%  
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Four Customers [Member]        
Concentration Risk, Percentage       87.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member]        
Concentration Risk, Number of Customers     3 3
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Three Customers [Member]        
Concentration Risk, Percentage     81.00% 86.00%
Reverse Stock Split [Member]        
Stockholders' Equity Note, Stock Split, Conversion Ratio 8      
Reclassification to Report Debt Issuance Costs as a Contra Debt Liability [Member] | December 31, 2015 [Member]        
Prior Period Reclassification Adjustment   $ (387,000)