Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Revenue Recognition - Impact of ASC 606 On the Condensed Consolidated Statements of Operations (Unaudited) (Details)

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Note 2 - Revenue Recognition - Impact of ASC 606 On the Condensed Consolidated Statements of Operations (Unaudited) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Rentals $ 13,773 $ 15,322 $ 42,246 $ 45,228
Net revenues 16,677 17,588 49,575 52,184
Gross profit 9,548 11,041 29,174 32,031
Provision for doubtful accounts 1,274 4,456
Total selling, general and administrative 9,643 $ 10,481 28,885 $ 34,532
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]        
Rentals 1,467   4,804  
Net revenues 1,467   4,804  
Gross profit 1,467   4,804  
Provision for doubtful accounts 1,467   4,804  
Total selling, general and administrative 1,467   4,804  
Calculated under Revenue Guidance in Effect before Topic 606 [Member]        
Rentals 15,240   47,050  
Net revenues 18,144   54,379  
Gross profit 11,015   33,978  
Provision for doubtful accounts 1,467   4,804  
Total selling, general and administrative $ 11,110   $ 33,689